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CAS No. : | 7583-53-1 | MDL No. : | MFCD00006497 |
Formula : | C7H15NO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | UGXQXVDTGJCQHR-UHFFFAOYSA-N |
M.W : | 129.20 | Pubchem ID : | 97998 |
Synonyms : |
|
Num. heavy atoms : | 9 |
Num. arom. heavy atoms : | 0 |
Fraction Csp3 : | 1.0 |
Num. rotatable bonds : | 1 |
Num. H-bond acceptors : | 2.0 |
Num. H-bond donors : | 1.0 |
Molar Refractivity : | 41.62 |
TPSA : | 23.47 Ų |
GI absorption : | High |
BBB permeant : | No |
P-gp substrate : | No |
CYP1A2 inhibitor : | No |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -6.86 cm/s |
Log Po/w (iLOGP) : | 1.93 |
Log Po/w (XLOGP3) : | 0.32 |
Log Po/w (WLOGP) : | -0.06 |
Log Po/w (MLOGP) : | 0.57 |
Log Po/w (SILICOS-IT) : | 0.78 |
Consensus Log Po/w : | 0.71 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -0.78 |
Solubility : | 21.6 mg/ml ; 0.167 mol/l |
Class : | Very soluble |
Log S (Ali) : | -0.38 |
Solubility : | 54.3 mg/ml ; 0.421 mol/l |
Class : | Very soluble |
Log S (SILICOS-IT) : | -0.55 |
Solubility : | 36.2 mg/ml ; 0.28 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 0.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.64 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H227-H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With dmap; triethylamine; In dichloromethane; at 20℃; for 2h; | Toluene-4-sulfonic acid 1-methyl-piperidin-3-ylmethyl ester A mixture of 2.07 g (16 mmol) 1-methyl-3-piperidinemethanol, 3.35 g (18 mmol) p-toluensulfonyl chloride, 0.58 g (5 mmol) 4-dimethylaminopyridine and 2.23 mL (16 mmol) NEt3 in 30 mL DCM was stirred for 2 h at room temperature. The mixture was washed with water and evaporated to dryness to yield 4.5 g (99%) of the title compound as yellow oil which was used without further purification. MS(m/e): 284.1 (MH+). |
58% | With triethylamine; In dichloromethane; at 0 - 20℃; for 6h; | To a stirred solution of 1 -methyl-3 -hydroxymethylpiperidine (2 g, 15.5 mmol) in DCM (30 mL) at 0C, triethylamine (4.9 g, 46 mmol) and tosyl chloride (4.41 g, 23.2 mmol) were added and allowed the mixture to stir at room temperature for 6 h. After completion, the reaction mixture was diluted with water (30 mL) and extracted with DCM (3 x 30 mL). The combined organic layer was dried over sodium sulfate and concentrated. The resulting crude was purified by flash chromatography (silica gel, 12 g cartridge) using 0-20% EtOAc in hexanes as eluent to obtain (l-methylpiperidin-3-yl)methyl 4- methylbenzenesulfonate (Yield: 2.50 g, 58%) as white solid. LCMS (ES) m/z = 284.36 [M+H]+; NMR (400 MHz, DMSO-d6) d ppm: 0.87-0.95 (m, 1H), 1.33-1.50 (m, 4H), 1.63 (m, 1H), 1.80-1.85 (m, 2H), 2.06 (s, 3H), 2.42 (s, 3H), 2.46-2.52 (m, 1H), 3.90 (m, 2H), 7.48 (d, J= 8.0 Hz, 2H). 7.78 (d, J= 8.0 Hz, 2H). |
With dmap; In dichloromethane; at 20℃; for 12h;Cooling with ice; | 10.0 g of 1-methyl-3-piperidinemethanol are dissolved in 100 ml of dichloromethane, and 9.46 g of 4-dimethylaminopyridine and 15.5 g of p-toluenesulfonyl chloride are added with ice cooling The reaction solution is stirred at room temperature for twelve hours and then washed with saturated NaHCO3 solution and dried over MgSO4, and the solvent is removed under reduced pressure. The resulting residue is dissolved in 150 ml of acetone, and 39.5 g of sodium iodide are added. The reaction mixture is heated at the boil under reflux for two hours. The solvent is then removed under reduced pressure, and the residue is taken up in 300 ml of ethyl acetate and washed twice with in each case 100 ml of water. The organic phase is dried over MgSO4 and then concentrated under reduced pressure. This gives 9.4 g of 3-iodomethyl-1-methylpiperidine. C7H141N (239.10), LCMS (ESI): 240.0 (M+H+). |
With triethylamine; In dichloromethane; at 20℃; for 5h; | Into a 250 mL round bottom flask containing a solution of (l-methylpiperidin-3- yl)methanol (8.0 g, 62 mmol) in dichloromethane (80 mL) was added triethylamine (17 mL, 125 mmol) followed by the addition of p-toluenesulfonyl chloride (14.2 g, 75 mmol) and the reaction mixture stirred at room temperature for 5 h. The reaction mixture was diluted with dichloromethane and washed with water and brine solution. The organic fraction was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude was purified by flash chromatography eluting with methanol in dichloromethane (5-7%) to afford (1-methylpiperidin-3-yl)methyl 4-methylbenzenesulfonate as a liquid. 1H NMR (DMSO-d6; 400 MHz): delta 7.80 (d, J = 7.8 Hz, 2H), 7.11 (d, J = 7.8 Hz, 2H), 4.01-3.91 (m, 2H), 3.21-3.16 (m, 2H), 2.64-2.58 (m, 2H), 2.43 (s, 3H), 2.42-2.29 (m, 1H), 2.09 (s, 3H), 1.77-1.74 (m, 2H), 1.62- 1.59 (m, 2H). MS calc'd [M+H]+ 284.1, found 284.4. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With triethylamine; In dichloromethane; at 20℃; for 2h; | Into a 100-mL round-bottom flask, was placed (l-methylpiperidin-3- yl)methanol (1 g, 7.74 mmol, 1 equiv), dichloromethane (20 mL), TEA (2.349 g, 23.21 mmol, 3.00 equiv), MsCl (1.326 g, 11.63 mmol, 1.50 equiv). The resulting solution was stirred for 2 h at 20 °C. The resulting mixture was concentrated under vacuum. This resulted in 1.6 g (100percent) of the title compound as a yellow solid. |
In dichloromethane; at 0 - 20℃; for 24h; | 3-HYDROXYMETHYL-L-METHYLPIPERIDINE (2 g, 9.66 mmol) was dissolved in DCM (15 mL), the solution was cooled to 0 °C and METHANESULFONYL chloride (0.9 mL, 11.6 mmol) was added dropwise. The reaction was then allowed to warm up to room temperature and left stirring for 24 H. After this time water (20 mL) was added to the reaction and the organic layer was separated, dried over NA2S04, filtered and solvent removed to give a colourless OIL. 1H NMR indicated a mixture of the starting piperidine and the desired product. This was then dissolved in acetonitrile (30 ML) along with 2-FLUORO-4-NITROPHENOL (1.52 g. , 9.66 mmol); potassium carbonate (2.67 g. , 19.32 mmol) was added and the reaction was heated at 90 °C for 18 h, then allowed to cool to room temperature. The solids were filtered and solvent removed from the filtrate. This gave 3.5 g of an orange oil. Column chromatography (5percent MeOH/DCM) gave a yellow solid which was shown to be a mixture of 2-fluoro-4-nitrophenol and 3- (2-FLUORO-4-NITROPHENOXYMETHYL)-L- methylpiperidine. The material was partitioned between DCM (30 mL) and saturated potassium carbonate solution (30 mL). The DCM layer was removed and washed with 5M HC1 (20 mL). The acidic layer was then basified to pH 10 and extracted twice with DCM (30 mL). The organics combined, dried over NA2SO4, filtered and solvent removed to give 3-(2-FLUORO-4-NIKOPHENOXYMETHYL)-1- methylpiperidine as a yellow OIL. 1NMR (400 MHz, (CD30D) 8.16-8. 06 (2 H, M), 7.33 (1 H, T, J8. 8), 4.17 (1 H, M), 4.09 (1 H, M), 3.32 (1 H, D, J 10. 8), 3.02 (1 H, t, J 11.5), 2.47 (3 H, s), 2.22 (3 H, M), 1. 89 (3 H, M), 1.75 (1 H, M), 1.28 (1 H, M). | |
In dichloromethane; at 20℃; for 24h; | General Scheme J; General Method J; Preparation of 3- (2-Fluoro-4-nitrophenoxymethyl)-1-methylpiperidine; 3-Hydroxymethyl-l-methylpiperidine (2 g, 9.66 mmol) was dissolved in DCM (15 mL), the solution was cooled to 0 °C and methanesulfonyl chloride (0.9 mL, 11.6 mmol) was added dropwise. The reaction was then allowed to warm up to room temperature and left stirring for 24 h. After this time water (20 mL) was added to the reaction and the organic layer was separated, dried over Na2S04, filtered and solvent removed to give a colorless oil. 1H NMR indicated a mixture of the starting piperidine and the desired product. This was then dissolved in acetonitrile (30 mL) along with 2-fluoro-4-nitrophenol (1.52 g. , 9.66 mmol) ; potassium carbonate (2.67 g. , 19.32 mmol) was added and the reaction was heated at 90 °C for 18 h, then allowed to cool to room temperature. The solids were filtered and solvent removed from the filtrate. This gave 3.5 g of an orange oil. Column chromatography (5percent MeOH/DCM) gave a yellow solid which was shown to be a mixture of 2-fluoro-4-nitrophenol and 3-(2-fluoro-4-nitrophenoxymethyl)-1- methylpiperidine. The material was partitioned between DCM (30 mL) and saturated potassium carbonate solution (30 mL). The DCM layer was removed and washed with 5M HC1 (20 mL). The acidic layer was then basified to pH 10 and extracted twice with DCM (30 mL). The organics combined, dried over Na2SO4, filtered and solvent removed to give 3-(2-fluoro-4-nitrophenoxymethyl)-1- methylpiperidine as a yellow oil. 1NMR (400 MHz, (CD30D) 8.16-8. 06 (2 H, m), 7. 33 (1 H, t, J8. 8), 4.17 (1 H, m), 4.09 (1 H, m), 3. 32 (1 H, d, J 10. 8), 3.02 (1 H, t, J 11.5), 2.47 (3 H, s), 2.22 (3 H, m), 1. 89 (3 H, m), 1.75 (1 H, m), 1. 28 (1 H, m).; Alternatively, the nitro derivative was prepared as follows: 3,4-Difluoronitro phenol (3 g, 18. 7 mmol) and 3-hydroxy-1-methylpiperidine (2.5 g, 19.3 mmol) were dissolved in dry THF (100 mL) under nitrogen. Sodium hydride (60percent, 1 g, 25 mmol) was slowly added under positive nitrogen pressure. The resulting light yellow solution was heated at 60 °C for 2.5 h. The dark-red solution was left to cool to room temperature and quenched with a solution of acetic acid (0.3 mL, 5.2 mmol) in methanol (10 mL). Solvent was removed under reduced pressure to yield an orange solid that was purified by column chromatography using DCM: MeOH (75: 25) as eluent to yield 3- (2-fluoro-4-nitro phenoxymethyl)-l- methylpiperidine as an orange oil. |
0.65 g | With triethylamine; In dichloromethane; at 0 - 20℃; for 5h; | Step a. To a stirred solution of (l-methylpiperidin-3-yl)methanol (CAS Number 7583-53-1; available from Ark Pharm) (0.5 g, 3.876 mmol) in DCM (10 ml) was added TEA (0.78 g, 7.752 mmol) and methane sulfonyl chloride (0.66 g, 5.804 mmol) at 0°C. The reaction mixture was stirred at rt for 5 h. The reaction mixture was poured into water (20 ml) and saturated NaHC03 solution (10 ml) and extracted with EtOAc (3 x 50 ml). The combined organic phase was washed with brine solution (20 ml), dried over Na2S04, filtered and concentrated under reduced pressure. The resulting residue was purified by flash chromatography (5percent MeOH in DCM) yielding (1-methylpiperidin-3-yl)methyl methanesulfonate (0.65 g, 3.136 mmol); NMR (400 MHz, DMSO-d6) delta ppm 4.04 - 4.13 (m, 2 H), 3.17 (s, 3 H), 2.68 (d, J=8.8 Hz, 1H), 2.57 (d, J=10.4 Hz, 1H), 2.15 (s, 3 H), 1.87 - 1.92 (m, 2 H), 1.76 (t, J=10 Hz, 1H), 1.59 - 1.63 (m, 2 H), 1.41 - 1.50 (m, 1H), 0.97 - 1.05 (m, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride; In tetrahydrofuran; at 60℃; for 2.5h;Product distribution / selectivity; | General Scheme J; General Method J; Preparation of 3- (2-Fluoro-4-nitrophenoxymethyl)-1-methylpiperidine; 3-Hydroxymethyl-l-methylpiperidine (2 g, 9.66 mmol) was dissolved in DCM (15 mL), the solution was cooled to 0 °C and methanesulfonyl chloride (0.9 mL, 11.6 mmol) was added dropwise. The reaction was then allowed to warm up to room temperature and left stirring for 24 h. After this time water (20 mL) was added to the reaction and the organic layer was separated, dried over Na2S04, filtered and solvent removed to give a colorless oil. 1H NMR indicated a mixture of the starting piperidine and the desired product. This was then dissolved in acetonitrile (30 mL) along with 2-fluoro-4-nitrophenol (1.52 g. , 9.66 mmol) ; potassium carbonate (2.67 g. , 19.32 mmol) was added and the reaction was heated at 90 °C for 18 h, then allowed to cool to room temperature. The solids were filtered and solvent removed from the filtrate. This gave 3.5 g of an orange oil. Column chromatography (5percent MeOH/DCM) gave a yellow solid which was shown to be a mixture of 2-fluoro-4-nitrophenol and 3-(2-fluoro-4-nitrophenoxymethyl)-1- methylpiperidine. The material was partitioned between DCM (30 mL) and saturated potassium carbonate solution (30 mL). The DCM layer was removed and washed with 5M HC1 (20 mL). The acidic layer was then basified to pH 10 and extracted twice with DCM (30 mL). The organics combined, dried over Na2SO4, filtered and solvent removed to give 3-(2-fluoro-4-nitrophenoxymethyl)-1- methylpiperidine as a yellow oil. 1NMR (400 MHz, (CD30D) 8.16-8. 06 (2 H, m), 7. 33 (1 H, t, J8. 8), 4.17 (1 H, m), 4.09 (1 H, m), 3. 32 (1 H, d, J 10. 8), 3.02 (1 H, t, J 11.5), 2.47 (3 H, s), 2.22 (3 H, m), 1. 89 (3 H, m), 1.75 (1 H, m), 1. 28 (1 H, m).; Alternatively, the nitro derivative was prepared as follows: 3,4-Difluoronitro phenol (3 g, 18. 7 mmol) and 3-hydroxy-1-methylpiperidine (2.5 g, 19.3 mmol) were dissolved in dry THF (100 mL) under nitrogen. Sodium hydride (60percent, 1 g, 25 mmol) was slowly added under positive nitrogen pressure. The resulting light yellow solution was heated at 60 °C for 2.5 h. The dark-red solution was left to cool to room temperature and quenched with a solution of acetic acid (0.3 mL, 5.2 mmol) in methanol (10 mL). Solvent was removed under reduced pressure to yield an orange solid that was purified by column chromatography using DCM: MeOH (75: 25) as eluent to yield 3- (2-fluoro-4-nitro phenoxymethyl)-l- methylpiperidine as an orange oil. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With pyridine; dibromotriphenylphosphorane; In acetonitrile; at 0 - 25℃; for 94h; | 3-(HYDROXYMETHYL)-1-METHYLPIPERIDINE (2g, 15. 5MMOLES) was dissolved in anhydrous acetonitrile (32mL) and anhydrous pyridine (2.02mL, 24. 8mmoles) was added and the solution was cooled to 0 C. Dibromotriphenylphosphorane (8. 49G, 20. 2mmoles) was added at 0 C and the mixture was allowed to warm up to 25 C and was stirred for 94h. The mixture was evaporated to dryness and the residue was chromatographed on a silica gel column (30x5cm) using gradient elution with dichloromethane, 35percent diethyl ether in DICHLOROMETHANE and 5-10percent methanol in dichloromethane as the eluant to give 3-(BROMOMETHYL)-1- METHYLPIPERIDINE (3.13g, 100percent): FABMS: m/z 192.1 (MH+) ; 8H (CDCI3) 1.52 (1H, m, CH2), 1. 99 (2H, m, CH2), 2.43 (1 H, m, CH2), 2.75 (2H, m, CH2), 2.82 (1 H, m, CH), 2.86/2. 88 (3H, s, NCH3), 3.42/3. 49 (2H, dd,-CH2Br) and 3.56 ppm (2H, m, CH2); 8C (CDCI3) CH3 : 44.3 ; CH2: 22.1, 26.6, 35.4, 54.8, 58.2 ; CH: 34. 6. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triphenylphosphine; diethylazodicarboxylate; In methanol; dichloromethane; | 4-(4-Chloro-2-fluorophenoxy)-7-hydroxy-6-methoxyquinazoline (12.1g, 38mmol), (prepared as described for the starting material in Example 5), was suspended in dichloromethane (375ml) and treated with triphenylphosphine (29.6g, 113mmol) then stirred at ambient temperature for 30 minutes. (1-Methylpiperidin-3-yl)methanol (8.25g, 63.8mmol) and (R)-(1-methylpiperidin-3-yl)methanol (1.46g, 11.3mmol), (CAS 205194-11-2), giving R:S (57.5:42.5 by chiral HPLC) (9.7g, 75mmol) were dissolved in dichloromethane (75ml) and added to the suspension. Diethyl azodicarboxylate (17.7ml, 75mmol) was added in portions using a syringe pump and the mixture was then allowed to warm to ambient temperature and stirred overnight. The residue was concentrated under vacuum then chromatographed on silica eluding with dichloromethane followed by dichloromethane/methanol /ammonia (93/6/1). The relevant fractions were combined and evaporated to give an oil. The residue was triturated with ether, filtered and dried to give (R,S)-4-(4-chloro-2-fluorophenoxy)-6-methoxy-7-((1-methylpiperidin-3-yl)methoxy)quinazoline (8.7g, 53percent). 1H NMR Spectrum: (DMSOd6) 1.11(m, 1H); 1.50(m, 1H); 1.58-1.98(m, 4H); 2.09(m, 1H); 2.15(s, 3H); 2.62(d, 1H); 2.81(d, 1H); 3.95(s, 3H); 4.09(d, 2H); 7.39(m, 2H); 7.55(m, 2H); 7.67(d, 1H); 8.53(s, 1H) MS (ESI): 432 (MH)+ |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
j) 4-(2,3-Dimethylindol-5-yloxy)-7-hydroxy-6-methoxyquinazoline (97 mg) was reacted with 1-methyl-3-piperidinemethanol (75 mg) to give 4-(2,3-dimethylindol-5-yloxy)-6-methoxy-7-(1-methylpiperidin-3-ylmethoxy)quinazoline. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With di-isopropyl azodicarboxylate; triphenylphosphine; In tetrahydrofuran; at 20℃; for 12h; | To a stirred solution of 1-methylpiper-idine-3-methanol (1 g, 5.3 mmol), 2-nitro-4-bromo-phenol (1.15 g, 5.3 mmol), and triphenylphosphine(1.39 g, 5.3 mmol) in dry THF (25 mL) under a nitro- gen atmosphere was added dropwise a solution ofdiisopropyl azodicarboxylate (1.04 mL, 5.3 mmol).The resulting mixture was stirred at room tempera- ture for 12 hours, then was diluted with ethylacetate (75 mL) and washed with brine (2 x 50 mL).The combined organic layers were dried over MgS04,filtered, and concentrated under reduced pressure.The crude material was purified on columnchromatography (silica gel) and eluted with 5percent MeOHin CH2C12 to yield a colorless oil. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1-[4-Fluoro-2-(1-methyl-piperidin-3-ylmethoxy)-phenyl]-3-(5-methyl-pyrazin-2-yl)-urea Prepared according to the methods for compound 303, using 2-nitro-5-fluorophenol and 1-methyl-3-hydroxymethyl piperidine. 1H NMR (400 MHz, CDCl3) delta8.50 (br s, 1H), 8.19 (m, 2H), 6.65 (m, 2H), 3.85 (m, 2H), 3.60 (s, 3H), 2.80-3.20 (m, 2H), 2.54 (s, 3H), 2.39 (s, 3H), 1.60-2.10 (m 5H). LRMS (ESI, Positive) m/e 373.95 (M+1). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1-[5-Fluoro-2-(1-methyl-piperidin-3-ylmethoxy)-phenyl]-3-(5-methyl-pyrazin-2-yl)-urea Steps 1-2: According to procedure for compound 300, using 1,4-difluoro-2-nitrobenzene and 1-methyl-3-hydroxymethyl piperidine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With triethylamine; In dichloromethane; | Step A Toluene-4-sulfonic acid 1-methyl-piperidin-3-ylmethyl Ester (1-Methyl-piperidin-3-yl)-methanol (1.0 mL, 7.75 mmol, 1 eq) was suspended in dry CH2Cl2 (20 mL) under Ar. Triethylamine (1.9 mL, 14 mmol, 2.0 eq) was added followed by thc addition of toluencsulfonyl chloride (1.49 g, 7.8 mmol, 1.0 eq.). The reaction mixture was stirred at room temperature for 18 hours, and then quenched with aqueous sodium bicarbonate. The aqueous layers were extracted several times with CH2Cl2, and the combined organic layers were dried over Na2SO4. After removing the solvent, the residue was loaded on silica gel and chromatographed (ethyl acetate/methanol/triethylamine 87/10/3). 1.85 g (85percent yield) of the amine tosylate was obtained as a yellow oil. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
33% | With tributylphosphine; In dichloromethane; acetone; | Alternatively the racemate may be made as follows: 1,1'-(Azodicarbonyl)dipiperidine (560 mg, 2.2 mmol) was added in portions to a mixture of 4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (240 mg, 0.75 mmol), (prepared as described for the starting material in Example 2), 1-methyl-3-piperidinemethanol (115 mg, 0.89 mmol) and tributylphosphine (440 mg, 2.2 mmol) in methylene chloride (10 ml). The mixture was stirred for 18 hours, diluted with ether and the resulting precipitate was removed by filtration. The volatiles were removed from the filtrate by evaporation, and the residue was dissolved in acetone and ethereal hydrogen chloride (1.5 ml of a 1M solution, 1.5 mmol) was added. The precipitated product was collected by filtration and purified by column chromatography eluding with methylene chloride/methanol/aqueous ammonia (75/8/1). The purified solid product was triturated with ether collected by filtration and dried to give 4-(4chloro-2-fluoroanilino)-6-methoxy-7-(1-methylpiperidin-3-ylmethoxy)quinazoline (105 mg, 33percent). m.p. 211-212° C.; 1H NMR Spectrum: (DMSOd6) 1.08(m, 1H); 1.50(m, 1H); 1.78(m, 4H); 2.08(m, 1H); 2.16(m, 3H); 2.62(m, 1H); 2.82(m, 1H); 3.95(s, 3H); 4.00(d, 2H); 7.18(s, 1H); 7.32(m, 1H); 7.52(dd, 1H); 7.58(t, 1H); 7.79(s, 1H); 8.35(s, 1H); 9.52(s, 1H); MS-ESI: 431 [MH]+; Elemental analysis: Found C, 59.9; H, 5.5; N, 12.9; C22H24N4O2ClF 0.5H2O Requires C, 60.0; H, 5.7; N, 12.7percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
53% | With triphenylphosphine; In methanol; dichloromethane; | A mixture of 4-(4-chloro-2-fluorophenoxy)-7-hydroxy-6-methoxyquinazoline (12.1 g), triphenylphosphine (29.6 g) and methylene chloride (375 ml) was stirred at ambient temperature for 30 minutes. The reaction mixture was cooled in an ice-bath and a solution of N-methylpiperidin-3-ylmethanol (8.25 g) in methylene chloride (75 ml) was added followed by the portionwise addition of diethyl azodicarboxylate (17.7 ml). The reaction mixture was allowed to warm to ambient temperature and was stirred overnight. The mixture was concentrated under vacuum and the residue was purified by column chromatography on silica using initially methylene chloride and then a 93:6:1 mixture of methylene chloride, methanol and an aqueous ammonium hydroxide solution as eluent. The material so obtained was triturated under diethyl ether. There was thus obtained 4-(4-chloro-2-fluorophenoxy)-6-methoxy-7-(N-methylpiperidin-3-ylmethoxy)quinazoline (8.7 g, 53percent); NMR: (DMSOd6) 1.11 (m, 1H), 1.5 (m, 1H), 1.58-1.98 (m, 4H), 2.09 (m, 1H), 2.15 (s, 3H), 2.62 (d, 1H), 2.81 (d, 1H), 3.95 (s, 3H), 4.09 (d, 2H), 7.39 (m, 2H), 7.55 (m, 2H), 7.67 (d, 1H), 8.53 (s, 1H); Mass: M+H+ 432. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | With ammonium hydroxide; triphenylphosphine; In tetrahydrofuran; dichloromethane; | A. Preparation of I where R1, R2 and R6 are Methyl, R3 and R5 are Hydrogen, and R4 is Bromo 3-Hydroxymethyl-1-methylpiperidine (0.4 mL, 3.14 mmol) and triphenylphosphine (1.01 g, 3.85 mmol) were added to a solution of 4-bromo-2,6-dimethylphenol (517 mg, 2.57 mmol) in tetrahydrofuran (10 mL) at 0° C. under dry nitrogen, followed by the dropwise addition of diethyl azodicarboxylate (0.57 mL, 3.60 mmol). The mixture was stirred at 0° C. for 4 hours and the solvent removed in vacuo. The residue was purified on silica gel, eluding with 5percent methanol in dichloromethane containing 0.25percent ammonium hydroxide, to give 3-(4-bromo-2,6-dimethylphenoxymethyl)-1-methylpiperidine as an oil (531 mg, 66percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 58 (1-Methyl-3-piperidino)methyl 1-phenylcyclobutanecarboxylate Hydrochloride The title compound was prepared in an analogous manner to that in Example 36 by reacting 1-phenylcyclobutanecarbonyl chloride with 1-methyl-3-piperidinemethanol at 80° C. for 18 h. The yield was 1.4 g (77percent); mp 126-128° C.; 1 H NMR (D2 O) delta 1.15 (m, 1H), 1.67-1.81 (m, 2H), 1.97 (m, 2H), 2.05-2.19 (m, 2H), 2.42 (t, 1H), 2.64 (m, 2H), 2.73 (m, 1H), 2.80 (s, 3H), 2.87 (m, 2H), 3.17 (d, 1H), 3.49 (d, 1H), 4.09 (q, 1H), 4.17 (q, 1H), 7.44 (t, 1H), 7.49 (d, 2H), 7.54 (t, 2H). Anal. (C18 H25 NO2.HCl) C, H, N. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | With sodium hydroxide; formaldehyd; formic acid; | EXAMPLE 5 [(N-Methyl-3-piperidyl)methyl]-[trans-2'-(N,N-dibutylamino)cyclohexyl] carbonate hydrochloride hydrate A! At 0° C., 3-hydroxymethyl-piperidine (20 g, 173 mmoles) was slowly added to formic acid (63 ml, 1.66 moles) then a 40percent solution of formaldehyde was added (62.4 ml, 833 mmoles). The mixture was refluxed for 5 hours, then the solvent was evaporated and the residue taken up in little water, brought to basic pH with 32percent sodium hydroxide and extracted with ethyl ether. The organic phase was anhydrified over sodium sulfate and evaporated. The resultant crude was purified by distillation and provided 17 g (yield: 76percent) of N-methyl-3-hydroxymethylpiperidine (b.p.--85°-86° C./1 mmHg). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
40% | With triphenylphosphine; diethylazodicarboxylate; In tetrahydrofuran; at 20℃; for 3h; | To a stirred solution of compound II (3 mg, 0.009 mmol) in THF (1.0 mL) was added (l-methylpiperidin-3-yl)methanol (5.0 muL, 0.036 mmol), triphenylphosphine (16 mg, 0.048 mmol) and diethyl azodicarboxylate (6.3 muL, 0.048 mmol). After stirring at room temperature for 3 h, the reaction mixture was concentrated. The residue was dissolved in THF/water (3:2, 0.8 mL), passed through a 0.45 mum filter, and purified by HPLC on a Varian Inertsil.(R). 5mu ODS-3 (250x100) reverse-phase HPLC column. Elution with 10percent to 90percent gradient of 0.1percent EPO <DP n="83"/>AcOH in water/0.1 percent AcOH in CH3CN over 40 min provided IV (1.7 mg, 40percent yield): LRMS m/z (M+H) calcd for C25H34NO8 476.2; obsd 476.2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
REFERENCE EXAMPLE 5 1,1-Dimethyl-3-hydroxymethylpiperidinium p-toluenesulfonate The procedures of Reference Example 3 were repeated using 2.58 g of 1-methyl-3-piperidinemethanol and 3.72 g of methyl p-toluenesolfonate, to give 5.13 g of the desired compound, m.p. 130°-132° C. 1 H NMR (DMSO-d6) delta: 0.8-2.1 (m, 5H), 2.29 (s, 3H), 2.6-3.6 (m, 6H), 3.03 (s, 3H), 3.11 (s, 3H), 4.79 (t, 1H), 6.9-7.6 (m, 4H). IR (KBr) cm-1: 3360, 3050, 3020, 2940, 2910, 2860, 1480, 1450, 1215, 1190, 1045, 1010, 820, 700, 560. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thionyl chloride; | Preparation 1F Following a procedure similar to that described in Preparation 1D above, a solution of 95 g. (0.735 mole) of 3-hydroxymethyl-1-methylpiperidine in 600 ml. of MDC was cooled to 0° C. and treated dropwise with 53.6 ml. of thionyl chloride. When addition was complete, the reaction mixture was heated to reflux for one hour and then taken to dryness to give 135 g. of 3-chloromethyl-1-methylpiperidine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With pyridine; In methanol; dichloromethane; acetonitrile; | A. 3-(BROMOMETHYL)-1-METHYLPIPERIDINE <strong>[7583-53-1]3-(Hydroxymethyl)-1-methylpiperidine</strong> (2 g, 15.5 mmoles) was dissolved in anhydrous acetonitrile (32 mL) and anhydrous pyridine (2.02 mL, 24.8 mmoles) was added and the solution was cooled to 0° C. Dibromotriphenylphosphorane (8.49 g, 20.2 mmoles) was added at 0° C. and the mixture was allowed to warm up to 25° C. and was stirred for 94 h. The mixture was evaporated to dryness and the residue was chromatographed on a silica gel column (30*5 cm) using gradient elution with dichloromethane, 35percent diethyl ether in dichloromethane and 5-10percent methanol in dichloromethane as the eluant to give 3-(bromomethyl)-1-methylpiperidine (3.13 g, 100percent): FABMS: m/z 192.1 (MH+); deltaH (CDCl3) 1.52 (1H, m, CH2), 1.99 (2H, m, CH2), 2.43 (1H, m, CH2), 2.75 (2H, m, CH2), 2.82 (1H, m CH), 2.86/2.88 (3H, s, NCH3), 3.42/3.49 (2H, dd, -CH2Br) and 3.56 ppm (2H, m, CH2); deltaC (CDCl3) CH3: 44.3; CH2: 22.1, 26.6, 35.4, 54.8, 58.2; CH: 34.6. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
37% | Example 159; {4-[4-(4-Bromo-phenylcarbamoyl)-2-(7-isopropyl-pyrido[2,3-d]pyrimidin-4-ylamino)- phenylsulfanyl]-phenyl}-carbamic acid l-methyl-piperidin-3-ylmethyl ester; [05861 The product from Example 100 (76 mg, 0.1 mmol), (l-methyl-piperidin-3-yl)-methanol (65 mg, 0.5 mmol) and l ,8-diazabicyclo[5.4.0]undec-7-ene (15 muL, 0.1 mmol) in tetrahydrofuran (5 <n="162"/>mL) was heated at 60 0C for 1 hour. The mixture was added saturated sodium carbonate, extracted with ethyl acetate, dried with magnesium sulfate, filtered and evaporated. The residue was purified by reverse phase preparative HPLC with TFA method to give the title compound as a trifluoroacetic acid salt (36 mg, 37percent). 1H NMR (300 MHz, DMSOd6) delta ppm:. 1.20 (m, 1 H) 1.36 (d, J=6.99 Hz3 6 H) 1.78 (m, 3 H) 2.14 (m, 1 H) 2.79 (d, J=4.04 Hz, 3 H) 3.28 (m, 1 H) 3.44 (m, 4 H) 4.02 (m, 2 H) 7.07 (d, J=8.09 Hz, 1 H) 7.40 (d, J=8.82 Hz, 2 H) 7.54 (m, 4 H) 7.73 (d, J=8.82 Hz, 2 H) 7.85 (m, 2 H) 7.98 (s, 1 H) 8.79 (s, 1 H) 8.95 (d, J=8.46 Hz, 1 H) 9.46 (s, 1 H) 9.96 (s, 1 H) 10.38 (s, 1 H) 11.38 (s, 1 H); MS (ESI+) m/z 740 742 (M+H)+. | |
37% | The product from Example 60 (76 mg, 0.1 mmol), (l-methyl-piperidin-3-yl)- methanol (65 mg, 0.5 mmol) and l,8-diazabicyclo[5.4.0]undec-7-ene (15 muL, 0.1 mmol) in tetrahydrofuran (5 mL) was heated at 60 0C for 1 hour. The mixture was added saturated sodium carbonate, extracted with ethyl acetate, dried with magnesium sulfate, filtered and evaporated. The residue was purified by reverse phase preparative HPLC with TFA method to give the title compound as a trifluoroacetic acid salt (36 mg, 37percent). 1H NMR (300 MHz, DMSO-d6) delta ppm: 1.20 (m, 1 H) 1.36 (d, J=6.99 Hz, 6 H) 1.78 (m, 3 H) 2.14 (m, 1 H) 2.79 (d, J=4.04 Hz, 3 H) 3.28 (m, 1 H) 3.44 (m, 4 H) 4.02 (m, 2 H) 7.07 (d, J=8.09 Hz, 1 H) 7.40 (d, J=8.82 Hz, 2 H) 7.54 (m, 4 H) 7.73 (d, J=8.82 Hz, 2 H) 7.85 (m, 2 H) 7.98 (s, 1 H) 8.79 (s, 1 H) 8.95 (d, J=8.46 Hz, 1 H) 9.46 (s, 1 H) 9.96 (s, 1 H) 10.38 (s, 1 H) 11.38 (s, 1 H); MS (ESI+) m/z 740 742 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Example 20; 5-(1-Methylpiperidin-3-ylmethoxy)quinazoline-2,4-diamine; [0093] Step 1; Sodium hydride (60percent; 316 mg; 7.9 mmol) was suspended in DMF and cooled to 0 °C. 1-Methylpiperdin-3-ylmethanol (998 mg; 7.5 mmol) was added dropwise to the sodium hydride mixture. The solution was allowed to warm to room temperature and stirred for 30 minutes. The solution was then cooled to 0 °C. 2,6- Difluorobenzonitrile (1.1 g; 7.9 mmol) in DMF was cooled to 0° C and the alcohol mixture was added dropwise to the benzonitrile solution and allowed to warm to room temperature overnight. The solution was poured into water and extracted with dichloromethane and solvent removed. Purification by column chromatography (10percent ethyl acetate/ hexane) to yield 79 milligrams of 2-fluoro-6-(1-methylpiperidin-3- ylmethoxy) benzonitrile. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
401.7 g | With Novozym 435; In n-heptane; at 65℃; under 65 - 85 Torr;Dean-Stark; | To a 3-neck, 2-L round bottom flask fitted with an overhead stirrer and a Dean-Stark trap with cold-finger condenser was added methyl laurate (302 g, 1 .41 mol) and 3-hydroxymethyl-1 -methylpiperidine (200 g, 1 .56 mol). Novozym 435 (30 g) was added, followed by the addition of heptane (120 mL). The internal pressure was reduced to 85 mm Hg and controlled by a vacuum regulator. The mixture was heated to 65°C. After 1 .5 hrs, 23 ml_ of methanol had collected in the Dean-Stark trap. At that point, the reaction was cooled to ambient temperature. The mixture was allowed to stand overnight. The following morning, the pressure was once again reduced to 85 mm Hg, and the mixture was heated to 65°C. The reaction was checked by 1 H NMR after 5.5 hours. Additional 3-hydroxymethyl-1 -methylpiperidine (9.00 g) was added. After 7.5 hrs, the mixture was cooled to ambient temperature. Then additional 3-hydroxymethyl-4-methylpiperidine (17.9 g) was once again added. The pressure was reduced to 65 mm Hg, and the mixture was heated to 65°C. After 5 hrs, the reaction was stopped. The mixture was filtered, and the solids were washed with additional heptane. Heptane (500 ml_) was added to the organics, which were then washed with water (1 x 500 ml_). After the layers were separated, the organics were dried with Na2SO4. After filtration, most of the volatiles were removed at reduced pressure. The remaining material was heated to 50°C and sparged (subsurface) for ca. 24 hrs with nitrogen at 100 mL/min to drive off residual heptane affording the title compound as a pale yellow oil (401 .7 g) that was 98.4percent pure by 1 H NMR analysis. 1 H NMR (300 MHz, CDCI3) delta 3.95 (m, 2H), 2.08 (m, 2H), 2.30 (t, J = 9 Hz, 2H), 2.27 (s, 3H) 2.01 -1 .83 (m, 2H); 1 .77-1 .56 (m, 8H); 1 .37-1 .21 (m, 17H), 0.89 (t, 3H).HPLC (150 x 4.6 mm Zorbax SB-C8 column, 75:25 (v:v) (0191) methanol :water (containing 0.1 vol percent trifluoroacetic acid) for 10 min, gradient to 100percent methanol over 1 min, held at 100percent methanol for 9 min, ELSD detection): tR (laurate ester) 5.0 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
110 mg | A solution of the mixture containing (7R,9Z)-18-hydroxyoctacos-9-en-7-yl acetate (0.33 g) obtained in Reference Example 48 and pyridine (0.35 g, 4.5 mmol) in toluene (7.1 mL) was cooled to 0°C in an ice bath, and a solution of triphosgene (0.14 g, 0.49 mmol) in toluene (1.1 mL) was added thereto over 1 minute. After stirring at 0°C for 10 minutes, the reaction mixture was heated to room temperature, stirred for 30 minutes, and cooled to 0°C again. (1-Methyl-3-piperidyl)methanol (0.96 g, 7.4 mmol) was added thereto, and the mixture was reacted at room temperature for 90 minutes. After treatment with a saturated aqueous solution of sodium bicarbonate, the reaction mixture was subjected to extraction with ethyl acetate, and the obtained organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was then subjected to silica gel column chromatography to obtain the compound of interest as a colorless liquid (110 mg). 1H-NMR (400 MHz, CDCl3) delta: 0.86 - 0.91 (6H, m), 0. 93-1.05 (1H, m), 1.17 - 1.38 (36H, m), 1.48 - 1.78 (8H, m), 1.85 - 1.94 (1H, m), 1.96 - 2.07 (6H, m), 2.24 - 2.34 (5H, m), 2.74 (1H, d, J = 10.5 Hz), 2.86 (1H, d, J = 10.5 Hz), 3.95 (1H, ddd, J = 2.7, 7.4, 10.2 Hz), 4.06 (1H, ddd, J = 2.7, 5.9, 10.2 Hz), 4.64 - 4.71 (1H, m), 4.87 (1H, quint, J = 6.3 Hz), 5.27 - 5.37 (1H, m), 5.43 - 5.51 (1H, m). MS (ESI+) m/z 622 [M+H]+ HRMS (ESI+) m/z 622.5438 (2.8 mDa). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | A solution of (6Z,9Z,26Z,29Z)-pentatriaconta-6,9,26,29-tetraen-18-ol (0.22 g, 0.44 mmol) obtained in Reference Example 4 and pyridine (0.22 g, 2.8 mmol) in toluene (4.4 mL) was cooled to 0°C in an ice bath, and a solution of triphosgene (0.090 g, 0.30 mmol) in toluene (0.66 mL) was added thereto over 2 minutes. After stirring at 0°C for 15 minutes, the reaction mixture was heated to room temperature, stirred for 1 hour, and cooled to 0°C again. (1-Methyl-3-piperidyl)methanol (0.60 g, 4.6 mmol) was added thereto, and the mixture was reacted overnight at room temperature. After treatment with a saturated aqueous solution of sodium bicarbonate, the reaction mixture was subjected to extraction with ethyl acetate-hexane, and the obtained organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was then subjected to silica gel column chromatography to obtain the compound of interest as a colorless liquid (201 mg, 70percent). 1H-NMR (400 MHz, CDCl3) delta: 0.89 (6H, m), 0.92 - 1.04 (1H, m), 1.21 - 1.40 (36H, m), 1.48 - 1.78 (8H, m), 1.85 - 1.94 (1H, m), 1.96 - 2.10 (9H, m), 2.26 (3H, s), 2.77 (4H, t, J = 6.6 Hz), 2.72 - 2.90 (2H, m), 3.94 (1H, dd, J = 7.4, 10.6 Hz), 4.05 (1H, dd, J = 5.5, 10.6 Hz), 4.64 - 4.72 (1H, m), 5.28 - 5.42 (8H, m). MS (ESI+) m/z 656 [M+H]+ HRMS (ESI+) m/z 656.5981 (-0.1 mDa). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | To a solution of triacontan-11-ol (0.18 g, 0.41 mmol) obtained in Reference Example 63 and pyridine (0.20 g, 2.6 mmol) in toluene (4.1 mL), a solution of triphosgene (0.084 g, 0.28 mmol) in toluene (0.62 mL) was added over 2 minutes. After stirring at room temperature for 1 hour, 1-methyl-3-piperidinemethanol (0.56 g, 4.3 mmol) was added thereto, and the mixture was reacted overnight at room temperature. After treatment with a saturated aqueous solution of sodium bicarbonate, the reaction mixture was subjected to extraction with hexane, and the obtained organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was then subjected to silica gel column chromatography to obtain the compound of interest as a colorless liquid (145 mg, 60percent). 1H-NMR (400 MHz, CDCl3) delta: 0.89 (6H, t, J = 7.0 Hz), 1.20 - 1.36 (50H, m), 1.48 - 1.77 (8H, m), 1.85 - 1.94 (1H, m), 1.95 - 2.07 (1H, m), 2.26 (3H, s), 2.75 (1H, d, J = 10.9 Hz), 2.86 (1H, d, J = 10.9 Hz), 3.94 (1H, dd, J = 7.4, 10.9 Hz), 4.06 (1H, dd, J = 5.9, 10.9 Hz), 4.64 - 4.71 (1H, m). MS (ESI+) m/z 594 [M+H]+ HRMS (ESI+) m/z 594.5827 (0.2 mDa). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
55% | A solution of (19Z,22Z)-octacosa-19,22-dien-11-ol (0.26 g, 0.64 mmol) obtained in Reference Example 17 and pyridine (0.32 g, 4.0 mmol) in toluene (7.4 mL) was cooled to 0°C in an ice bath, and a solution of triphosgene (0.13 g, 0.44 mmol) in toluene (0.9 mL) was added thereto over 2 minutes. After stirring at 0°C for 20 minutes, the reaction mixture was heated to room temperature, stirred for 1 hour, and cooled to 0°C again. (1-Methyl-3-piperidyl)methanol (0.87 g, 6.7 mmol) was added thereto, and the mixture was reacted overnight at room temperature. After treatment with a saturated aqueous solution of sodium bicarbonate, the reaction mixture was subjected to extraction with hexane, and the obtained organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was then subjected to silica gel column chromatography to obtain the compound of interest as a colorless liquid (360 mg, 55percent). 1H-NMR (500 MHz, CDCl3) delta: 0.85 - 0.91 (6H, m), 1.21-1.39 (32H, m), 1.49 - 1.76 (9H, m), 1.86 - 1.92 (1H, m), 1.96 - 2.07 (5H, m), 2.26 (3H, s), 2.74 (1H, d, J = 10.5 Hz), 2.77 (2H, t, J = 6.8 Hz), 2.85 (1H, d, J = 10.5 Hz), 3.94 (1H, dt, J = 3.2, 7.3 Hz), 4.06 (1H, ddd, J = 3.2, 5.9, 10.7 Hz), 4.65 - 4.71 (1H, m), 5.29 - 5.42 (4H, m). MS (ESI+) m/z 562 [M+H]+ HRMS (ESI+) m/z 562.5196 (-0.3 mDa). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With lithium aluminium tetrahydride; In tetrahydrofuran; at 0 - 20℃; for 1h; | Into a 500 mL round bottom flask containing a solution of methyl 1-methylpiperidine-3- carboxylate (12.0 g, 76 mmol) in tetrahydrofuran (500 mL) was added lithium aluminumhydride (4.3 g, 114 mmol) in portions at 0 °C and the reaction mixture was stirred at room temperature for 1 h. The reaction was quenched with methanol at 0 °C and the precipitated solid was filterred through celite. The filtrate was concentrated and the crude was purified by flash chromatography eluting with methanol in dichloromethane (5-10percent) to afford (1-methylpiperidin-3-yl)methanol as a solid. 1H NMR (DMSO-d6, 400 MHz): delta 3.38-3.35 (m, 1H), 3.27-3.20 (m, 1H), 3.18-3.15 (m, 1H), 2.77-2.72 (m, 1H), 2.66-2.60 (m, 2H), 2.10 (s, 3H), 1.78-1.75 (m, 1H), 1.73-1.51 (m, 4H), 1.48-1.29 (m, 1H). MS calc'd [M+H]+ 130.1, found 130.2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
22%; 23% | With cyanomethylenetributyl-phosphorane; In toluene; at 50℃; for 18h;Sealed tube; | General procedure: The reaction was performed in 2 batches. In a sealed tube, cyanomethylenetributyl phosphorane (9.28 mL, 35.40 mmol) was added to a solution of 3-methyl-5-nitro-lH- pyrazole (1.50 g, 1 1.80 mmol) and 3-hydroxymethyl-3-methyloxethane (3.53 mL, 35.40 mmol) in toluene (100 mL). The solution was heated at 60 °C for 18 h. The 2 batches were combined and the solvent was evaporated in vacuo. The residue (black oil) was purified by column chromatography on silica gel (irregular SiOH, 15-40 muiotaeta, 330 g, liquid loading on DCM, mobile phase: heptane/EtOAc, gradient from 90: 10 to 50:50). The fractions containing the product were combined and evaporated to dryness to give 3.95 g of intermediate 303 (79percent yield, orange oil) directly used as it in the next step. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | Sodium hydride (60percent, 1.5 mmol) was added portionwise to 1-methylpiperidine-3-methanol (1.2 mmol) at 0 °C.In 10 mL of N,N-dimethylformamide solution,Stir for 15 minutes,Intermediate 2 was then slowly added to the mixture at 0 ° C.The reaction mixture was slowly warmed to room temperature and stirred for 1 hour.The reaction solution was diluted with water.Extracted with ethyl acetate,Drying the combined organic layers,Rotary evaporation to give the crude product.The crude product was purified by silica gel column chromatography (dichlorobenzene:methanol = 20:1).Obtained a light yellow oil,Intermediate 8b,Yield: 73percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
69% | Sodium hydride (60percent, 1.5 mmol) was added in portions at 0 °C.1-methylpiperidin-3-methanol (1.2 mmol)In a solution of N,N-dimethylformamide,Stir for 15 minutes,Then, the intermediate 4b was slowly added to the reaction solution at 0 ° C.Slowly warm to room temperature and stir for 1 hour.Add water to quench the reaction,Extracted with ethyl acetate,Drying the combined organic layers,concentrate,The crude product was purified by silica gel column chromatography (dichlorobenzene:methanol = 20:1).Obtained a light yellow oil,That is, the target 5b,Yield: 69percent. |
Tags: 7583-53-1 synthesis path| 7583-53-1 SDS| 7583-53-1 COA| 7583-53-1 purity| 7583-53-1 application| 7583-53-1 NMR| 7583-53-1 COA| 7583-53-1 structure
[ 90226-87-2 ]
(1-Ethylpiperidin-4-yl)methanol
Similarity: 0.92
[ 90226-87-2 ]
(1-Ethylpiperidin-4-yl)methanol
Similarity: 0.92
[ 1210934-04-5 ]
(S)-(1-Methylpyrrolidin-3-yl)methanol
Similarity: 0.89
[ 90226-87-2 ]
(1-Ethylpiperidin-4-yl)methanol
Similarity: 0.92
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P301 + P310 | IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. |
P301 + P312 | IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. |
P301 + P330 + P331 | IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. |
P302 + P334 | IF ON SKIN: Immerse in cool water/wrap in wet bandages. |
P302 + P350 | IF ON SKIN: Gently wash with plenty of soap and water. |
P303 + P361 + P353 | IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. |
P304 + P312 | IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell. |
P304 + P340 | IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. |
P304 + P341 | IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P305 + P351 + P338 | IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. |
P306 + P360 | IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes. |
P307 + P311 | IF exposed: call a POISON CENTER or doctor/physician. |
P308 + P313 | IF exposed or concerned: Get medical advice/attention. |
P309 + P311 | IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician. |
P332 + P313 | IF SKIN irritation occurs: Get medical advice/attention. |
P333 + P313 | IF SKIN irritation or rash occurs: Get medical advice/attention. |
P335 + P334 | Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages. |
P337 + P313 | IF eye irritation persists: Get medical advice/attention. |
P342 + P311 | IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician. |
P370 + P376 | In case of fire: Stop leak if safe to Do so. |
P370 + P378 | In case of fire: |
P370 + P380 | In case of fire: Evacuate area. |
P370 + P380 + P375 | In case of fire: Evacuate area. Fight fire remotely due to the risk of explosion. |
P371 + P380 + P375 | In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion. |
Storage | |
Code | Phrase |
P401 | |
P402 | Store in a dry place. |
P403 | Store in a well-ventilated place. |
P404 | Store in a closed container. |
P405 | Store locked up. |
P406 | Store in corrosive resistant/ container with a resistant inner liner. |
P407 | Maintain air gap between stacks/pallets. |
P410 | Protect from sunlight. |
P411 | |
P412 | Do not expose to temperatures exceeding 50 oC/ 122 oF. |
P413 | |
P420 | Store away from other materials. |
P422 | |
P402 + P404 | Store in a dry place. Store in a closed container. |
P403 + P233 | Store in a well-ventilated place. Keep container tightly closed. |
P403 + P235 | Store in a well-ventilated place. Keep cool. |
P410 + P403 | Protect from sunlight. Store in a well-ventilated place. |
P410 + P412 | Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF. |
P411 + P235 | Keep cool. |
Disposal | |
Code | Phrase |
P501 | Dispose of contents/container to ... |
P502 | Refer to manufacturer/supplier for information on recovery/recycling |
Physical hazards | |
Code | Phrase |
H200 | Unstable explosive |
H201 | Explosive; mass explosion hazard |
H202 | Explosive; severe projection hazard |
H203 | Explosive; fire, blast or projection hazard |
H204 | Fire or projection hazard |
H205 | May mass explode in fire |
H220 | Extremely flammable gas |
H221 | Flammable gas |
H222 | Extremely flammable aerosol |
H223 | Flammable aerosol |
H224 | Extremely flammable liquid and vapour |
H225 | Highly flammable liquid and vapour |
H226 | Flammable liquid and vapour |
H227 | Combustible liquid |
H228 | Flammable solid |
H229 | Pressurized container: may burst if heated |
H230 | May react explosively even in the absence of air |
H231 | May react explosively even in the absence of air at elevated pressure and/or temperature |
H240 | Heating may cause an explosion |
H241 | Heating may cause a fire or explosion |
H242 | Heating may cause a fire |
H250 | Catches fire spontaneously if exposed to air |
H251 | Self-heating; may catch fire |
H252 | Self-heating in large quantities; may catch fire |
H260 | In contact with water releases flammable gases which may ignite spontaneously |
H261 | In contact with water releases flammable gas |
H270 | May cause or intensify fire; oxidizer |
H271 | May cause fire or explosion; strong oxidizer |
H272 | May intensify fire; oxidizer |
H280 | Contains gas under pressure; may explode if heated |
H281 | Contains refrigerated gas; may cause cryogenic burns or injury |
H290 | May be corrosive to metals |
Health hazards | |
Code | Phrase |
H300 | Fatal if swallowed |
H301 | Toxic if swallowed |
H302 | Harmful if swallowed |
H303 | May be harmful if swallowed |
H304 | May be fatal if swallowed and enters airways |
H305 | May be harmful if swallowed and enters airways |
H310 | Fatal in contact with skin |
H311 | Toxic in contact with skin |
H312 | Harmful in contact with skin |
H313 | May be harmful in contact with skin |
H314 | Causes severe skin burns and eye damage |
H315 | Causes skin irritation |
H316 | Causes mild skin irritation |
H317 | May cause an allergic skin reaction |
H318 | Causes serious eye damage |
H319 | Causes serious eye irritation |
H320 | Causes eye irritation |
H330 | Fatal if inhaled |
H331 | Toxic if inhaled |
H332 | Harmful if inhaled |
H333 | May be harmful if inhaled |
H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled |
H335 | May cause respiratory irritation |
H336 | May cause drowsiness or dizziness |
H340 | May cause genetic defects |
H341 | Suspected of causing genetic defects |
H350 | May cause cancer |
H351 | Suspected of causing cancer |
H360 | May damage fertility or the unborn child |
H361 | Suspected of damaging fertility or the unborn child |
H361d | Suspected of damaging the unborn child |
H362 | May cause harm to breast-fed children |
H370 | Causes damage to organs |
H371 | May cause damage to organs |
H372 | Causes damage to organs through prolonged or repeated exposure |
H373 | May cause damage to organs through prolonged or repeated exposure |
Environmental hazards | |
Code | Phrase |
H400 | Very toxic to aquatic life |
H401 | Toxic to aquatic life |
H402 | Harmful to aquatic life |
H410 | Very toxic to aquatic life with long-lasting effects |
H411 | Toxic to aquatic life with long-lasting effects |
H412 | Harmful to aquatic life with long-lasting effects |
H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
Sorry,this product has been discontinued.
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