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CAS No. : | 16665-38-6 | MDL No. : | MFCD07774100 |
Formula : | C7H9NO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | GBMRUSRMPOUVEK-UHFFFAOYSA-N |
M.W : | 139.15 | Pubchem ID : | 10820596 |
Synonyms : |
|
Num. heavy atoms : | 10 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.29 |
Num. rotatable bonds : | 2 |
Num. H-bond acceptors : | 3.0 |
Num. H-bond donors : | 1.0 |
Molar Refractivity : | 36.86 |
TPSA : | 42.35 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | No |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -7.17 cm/s |
Log Po/w (iLOGP) : | 1.51 |
Log Po/w (XLOGP3) : | -0.03 |
Log Po/w (WLOGP) : | 0.43 |
Log Po/w (MLOGP) : | -0.39 |
Log Po/w (SILICOS-IT) : | 1.17 |
Consensus Log Po/w : | 0.54 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -1.0 |
Solubility : | 14.0 mg/ml ; 0.101 mol/l |
Class : | Very soluble |
Log S (Ali) : | -0.41 |
Solubility : | 54.2 mg/ml ; 0.39 mol/l |
Class : | Very soluble |
Log S (SILICOS-IT) : | -1.95 |
Solubility : | 1.55 mg/ml ; 0.0111 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 0.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.54 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | 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 |
---|---|---|
62.9% | With manganese(IV) oxide In ethyl acetate at 80℃; for 2 h; | 4-Methoxypyridine-2-carbaldehyde, used as starting material was prepared as follows:- Manganese(IV) oxide (2.412 mL, 139.42 mmol, 4eq) was added portionwise to (4- methoxypyridin-2-yl)methanol (4.85g, 34.85 mmol, leq) in ethyl acetate (15OmL). The resulting mixture was stirred at 80 0C for 2 h. The hot reaction mixture was filtered through celite. The resulting mixture was evaporated to dryness to afford desired A- methoxypyridine-2-carbaldehyde (3.01 g, 21.93 mmol, 62.9 percent). IH NMR (400.132 MHz, DMSO) δ 3.93 (3H, s), 7.27 (IH, m), 7.44 (IH, d), 8.63 (IH, d), 9.96 (IH, s) |
46% | With manganese(IV) oxide In chloroform for 2.5 h; Reflux | A suspension of 17 (420 mg, 3.02 mmol) and MnO2 (3.2 g) in dry CHCl3 (5 mL) was refluxed for 2.5 hr. After removal of MnO2 by filtration, the filtrate was concentrated under reduced pressure to give 18 (193 mg, 46 percent) as a pale yellow solid. |
193 mg | With manganese(IV) oxide In ethyl acetate for 3 h; Reflux | Manganese dioxide (696 mg) was added to a solution of (4-methoxypyridin-2-yl)methanol (278 mg) obtained in Reference Example 21-6 (3) in ethyl acetate (5 mL), followed by refluxing for 1 hour. Manganese dioxide (696 mg) was added thereto, followed by refluxing for 2 hours. The reaction mixture was cooled to room temperature, the insoluble materials were filtered off, and the solvent was distilled off under reduced pressure. The obtained residues were purified by silica gel column chromatography (ethyl acetate), whereby 4-methoxypicolinic aldehyde (193 mg) was obtained as a colorless oily material |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62.9% | With manganese(IV) oxide; In ethyl acetate; at 80℃; for 2h; | 4-Methoxypyridine-2-carbaldehyde, used as starting material was prepared as follows:- Manganese(IV) oxide (2.412 mL, 139.42 mmol, 4eq) was added portionwise to (4- methoxypyridin-2-yl)methanol (4.85g, 34.85 mmol, leq) in ethyl acetate (15OmL). The resulting mixture was stirred at 80 0C for 2 h. The hot reaction mixture was filtered through celite. The resulting mixture was evaporated to dryness to afford desired A- methoxypyridine-2-carbaldehyde (3.01 g, 21.93 mmol, 62.9 percent). IH NMR (400.132 MHz, DMSO) delta 3.93 (3H, s), 7.27 (IH, m), 7.44 (IH, d), 8.63 (IH, d), 9.96 (IH, s) |
46% | With manganese(IV) oxide; In chloroform; for 2.5h;Reflux; | A suspension of 17 (420 mg, 3.02 mmol) and MnO2 (3.2 g) in dry CHCl3 (5 mL) was refluxed for 2.5 hr. After removal of MnO2 by filtration, the filtrate was concentrated under reduced pressure to give 18 (193 mg, 46 percent) as a pale yellow solid. |
193 mg | With manganese(IV) oxide; In ethyl acetate; for 3h;Reflux; | Manganese dioxide (696 mg) was added to a solution of <strong>[16665-38-6](4-methoxypyridin-2-yl)methanol</strong> (278 mg) obtained in Reference Example 21-6 (3) in ethyl acetate (5 mL), followed by refluxing for 1 hour. Manganese dioxide (696 mg) was added thereto, followed by refluxing for 2 hours. The reaction mixture was cooled to room temperature, the insoluble materials were filtered off, and the solvent was distilled off under reduced pressure. The obtained residues were purified by silica gel column chromatography (ethyl acetate), whereby 4-methoxypicolinic aldehyde (193 mg) was obtained as a colorless oily material |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
55.6% | (4-Methoxypyridin-2-yl)methanol, used as starting material was prepared as follows:- Trifiuoroacetic anhydride (50.8 mL, 359.32 mmol, 5eq) was added dropwise to A- methoxy-2-methylpyridine 1-oxide (1Og, 71.86 mmol, leq) in DCM (40OmL) at 0 0C over a period of 20 mins under nitrogen. The resulting solution was stirred at room temperature for 30 mins. The temperature was increased to 40 0C and the reaction mixture was stirred for a further 6 h then left to stir at room temperature overnight. The reaction mixture was quenched carefully with saturated sodium bicarbonate and stirred for 1 h. The reaction mixture was extracted with DCM and the organic layers were combined and washed with brine, dried (MgSO4), filtered and evaporated under reduced pressure to give (4- methoxypyridin-2-yl)methanol (5.56 g, 39.94mmol, 55.6 %) as a yellow oil. IH NMR (400.132 MHz, DMSO) delta 3.83 (3H, s), 4.52 (2H, s), 5.38 (IH, s), 6.82 (IH, m), 7.01 (IH, d), 8.29 (IH, d) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With thionyl chloride; In dichloromethane; at 0 - 45℃; for 3.5h; | To a cooled (0 C) solution of 17 (700 mg, 5.03 mmol) in dry CH2Cl2 (4 mL) was added dropwise SOCl2 (2.2 mL, 30.8 mmol). The reaction mixture was stirred at 45 C for 3.5 hr. After removal of the solvent under reduced pressure, the residue was dissolved in sat. NaHCO3 and extracted with CHCl3. The extracts were dried over MgSO4 and concentrated under reduced pressure to give 19 (796 mg, quant.) as a red liquid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thionyl chloride; In chloroform; | 14. 2-Chloromethyl-4-methoxypyridine hydrochloride 15 ml of thionyl chloride are added dropwise to a solution, cooled to -10 C., of 10 g (0.072 mole) of <strong>[16665-38-6]2-hydroxymethyl-4-methoxypyridine</strong> in 30 ml of dry chloroform in the course of 15 minutes. The solution is allowed to come to room temperature and stirring is continued for one and a half hours. After the solvent and the excess thionyl chloride have been stripped off, colorless crystals are obtained, and these are recrystallized from isopropanol [12.1 g (87%), m.p. 149-150 C., decomposition]. | |
With thionyl chloride; | (4) 2-Chloromethyl-4-methoxypyridine hydrochloride This was prepared by the method of Baker et. al., J. Chem. Soc., Chem. Comm., 3598, 1958, but starting with <strong>[16665-38-6]2-hydroxymethyl-4-methoxypyridine</strong> (as prepared in (3) above, 44.05 g, 0.317 mole) and thionyl chloride (500 ml) to give the title compound as a reddish solid, 46 g (75%) which was used directly in the following preparation without further purification. | |
With thionyl chloride; In chloroform; | (1) Thionyl chloride (23 cc) was added over 25 minutes to a stirred solution of <strong>[16665-38-6]2-hydroxymethyl-4-methoxypyridine</strong> (8.935 g) in chloroform at room temperature, and the mixture was stirred for a further 2 hours and was evaporated to dryness and the residue was triturated with ether and recrystallized from 0.9N ethanolic hydrogen chloride/ether (7:5) to give 2-chloromethyl-4-methoxypyridine hydrochloride m.p. 142 (decomp).(12.1 g). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
67% | With potassium carbonate; In hydrogenchloride; | (3) 2-Hydroxymethyl-4-methoxypyridine A solution of 2-acetoxymethyl-4-methoxypyridine (20.72 g, 0.114 mole) in 3M hydrochloric acid (100 ml) was heated under reflux for 1 hour. The resulting solution was concentrated under reduced pressure and the residue neutralised by addition of potassium carbonate. The mixture was extracted with dichloromethane and the organic solution dried over anhydrous sodium sulphate, filtered and evaporated to give a light coloured viscous oil which solidified on standing to yield the title compound (10.6 g, 67%) b.p. 135 C. at 0.1 mm mercury. |
820 mg | With sodium hydroxide; In methanol; water; for 3h;Reflux; | Methanol (5 mL) and a 2 mol/L sodium hydroxide aqueous solution (5 mL) were added to (4-methoxypyridin-2-yl)methyl acetate obtained in Reference Example 21-6 (2), followed by refluxing for 3 hours. The reaction mixture was cooled to room temperature, 2 mol/L hydrochloric acid was added thereto, the resultant product was extracted with chloroform and dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The obtained residues were purified by silica gel column chromatography (ethyl acetate:methanol=1:0?9:1), whereby (4-methoxypyridin-2-yl)methanol (820 mg) was obtained as a white solid. (0979) MS(ESI m/z): 140 (M+H) (0980) RT(min): 0.25 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
4-Methoxypyrid-2-ylcarbinol was prepared by the method of Katz, et al. and purified by chromatography, eluding with dichloromethane:methanol (95:5); TLC: Rf =0.45, dichloromethane:methanol (9:1); 300 MHz NMR: 3.82 (s,3), 4.50 (d,2), 5.40 (t,1), 6.81 (dd,1), 7.00 (d,1), 8.28 (d,1); MS: m/z=140(M+1). Example 25.b.: Isolated and used without further purification; TLC: Rf =0.25, dichloromethane:methanol (95:5); MS: m/z=563(M+1). | ||
14. 2-Chloromethyl-4-methoxypyridine hydrochloride 15 ml of thionyl chloride are added dropwise to a solution, cooled to -10 C., of 10 g (0.072 mole) of 2-hydroxymethyl-4-methoxypyridine in 30 ml of dry chloroform in the course of 15 min.. The solution is allowed to come to room temperature and stirring is continued for 1.5 h. After the solvent and the eccess thionyl chloride have been stripped off, colorless crystals are obtained, and these are recrystallized from isopropanol [12.1 g (87%), m.p. 149-150 C., decomposition]. | ||
PREPARATION 25 2-Hydroxymethyl4-methoxypyridine Title product of the preceding Preparation (20.75 g, 0.114 mol) and sodium methoxide (9.23 g, 0.171 mol) were combined in 110 ml methanol and heated under reflux for 65 minutes. The mixture was cooled, stripped in vacuo, the residue taken up in 100 ml H2 O, neutralized with 1N HCl and extracted with 3*70 ml of ethyl acetate. The organic layers were combined, dried (Na2 SO4) and stripped to yield title product as a solid, 14.2 g. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
67% | 5-[(5-Fluoro-2-methoxy-pyridin-4-yl)methoxy]-1H-pyrazol-3-amine, used as starting material, was prepared as follows:; -3-Amino-5-hydroxypyrazole (0.56 g, 5.65 mmol) and triphenylphosphine (1.78 g, 6.78 mmol) were stirred in DCM (I6 ml) under nitrogen and the reaction mixture was cooled in an ice-bath. Diisopropylazodicarboxylate (1.34 ml, 6.78 mmol) was added dropwise over a period of 10 min. The reaction mixture was then stirred in the ice-bath for 1 h. (5-Fluoro-2-methoxy-pyridin-4-yl)methanol (1.07 g, 6.78 mmol) in THF (15 ml) was added slowly over 5-10 min. The reaction mixture was stirred and allowed to warm to room temperature over 1 h. This was then stirred for a further 18 h. The mixture was filtered and washed through with DCM (10 ml). The filtrate was extracted with 2M HCl(aq) (3×8 ml) and the combined extracts were basified with 6N NaOH(aq). The basified aqueous phase was extracted with DCM (3×20 ml). The combined extracts were filtered, dried over MgSO4, filtered and evaporated. The crude product was purified by silica column chromatography, eluting with 0-3% MeOH in DCM, to afford 5-[(5-fluoro-2-methoxy-pyridin-4-yl)methoxy]-1H-pyrazol-3-amine as a white solid (354 mg, 26% yield).1H NMR (399.902 MHz, DMSO) delta 3.75 (s, 3H), 4.70 (s, 1H), 4.91 (s, 2H), 5.06 (s, 2H), 6.76 (d, 1H), 8.04 (d, 1H), 10.37 (s, 1H); m/z (ES+) [M+H]+=239. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With tributylphosphine; di-isopropyl azodicarboxylate; In tetrahydrofuran; at 20℃; for 16h; | Example 6; N-cyclopropyl-3-({4-[(4-methoxypyridin-2-yl)methoxy]benzoyl}amino)-4- methylbenzamide To a stirred solution of N-cyclopropyl-3-[(4-hydroxybenzoyl) amino] -4- methylbenzamide (200 mg, 0.64 mmol) and <strong>[16665-38-6]4-methoxy-2-hydroxymethylpyridine</strong> (500 mg, 3.6 mmol) in dry THF (25 mL) under an argon atmosphere was added successively tributylphosphine (500 mg, 2.5 mmol) and di-isopropyl azodicarboxylate (500 mg, 2.5 mmol). The mixture was stirred at 20C for 16 hours, then the solvent was evaporated at reduced pressure and the residue purified by silica column chromatography, eluting with a gradient of 0 to 10% methanol in ethyl acetate to give the title compound as a white solid (100 mg); NMR Spectrum : (DMSOd,) 1.55 (m, 2H), 1.65 (m, 2H), 2.25 (s, 3H), 2.85 (m, 1H), 3.85 (s, 3H), 5.20 (s, 2H), 6.95 (dd, 1H), 7.05 (d, 1H), 7.15 (d, 2H), 7.30 (d, 1H), 7.60 (dd, 1H), 7.80 (s, 1H), 7.95 (d, 2H), 8.35 (d, 1H), 8. 40 (broad s, 1H), 9. 80 (s, 1H) ; Mass Spectrum: M+H+ 432. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | With sodium tetrahydroborate; calcium chloride; In tetrahydrofuran; methanol; at 0 - 20℃; for 3.5h; | To a cooled (0 C) solution of 16 (1.2 g, 23.3 mmol) and CaCl2 (3.2 g, 28.8 mmol) in dry MeOH-THF (2 : 1, 12 mL) was added portionwise NaBH4 (545 mg, 14.4 mmol). The reaction mixture was stirred at rt for 3.5 hr. After cooling to 0 C, water was added to quench the reaction. The solvent was removed by evaporation and the residue was dissolved in water and extracted with CHCl3. The organic extracts were dried over MgSO4, concentrated under pressure, and then washed with hexane-Et2O (1 : 1) to give 17 (771 mg, 77 %) as a white solid. |
36% | b) Lithium aluminum hydride (16 ml of a 1.0 N solution in diethyl ether, 16 mmol) was added to a solution of methyl 4-methoxypicoline-2-carboxylate (2.70 g, 16 mmol) in diethyl ether (50 ml) at ambient temperature. The reaction was stirred for 1 hour, poured into an aqueous solution of Rochelle's salt (250 ml) and the reaction mixture extracted with ethyl acetate (3*50 ml). Purification of the crude product by flash chromatography on silica gel, eluding with dichloromethane-ethyl acetate, yielded 2-(hydroxymethyl)-4-methoxypyridine (800 mg, 36% yield) as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
51% | With ammonium persulfate; In methanol; dichloromethane (CH2 Cl2); water; | A. 2-hydroxymethyl-4-methoxypyridine The 4-methoxypyridine--N-oxide (6.3 g, 0.05 mol) was suspended in 150 ml of dichloromethane (CH2 Cl2). Trimethyloxoniumtetrafluoroborate (7.5 g, 0.05 mol) was added all at once and the reaction was stirred at room temperature for 2 hrs. After evaporation of the solvent, the residue was dissolved in methanol (150 ml) and heated to reflux. To this solution was added of ammonium persulfate (2.3 g) in 20 ml of water. After 30 min. a further portion of 1.2 g of persulfate in 5 ml of water was added. After refluxing for one hour the solution was cooled and concentrated under vacuum. The residue was chromatographed over silica with 9:1 chloroform/methanol to give 3.52 g (51% yield) of the subtitle compound. |
51% | With ammonium persulfate; In methanol; dichloromethane (CH2Cl2); water; | A. 2-hydroxymethyl-4-methoxypyridine The 4-methoxypyridine-N-oxide (6.3 g, 0.05 mol) was suspended in 150 ml of dichloromethane (CH2Cl2). Trimethyloxoniumtetrafluoroborate (7.5 g, 0.05 mol) was added all at once and the reaction was stirred at room temperature for 2 hrs. After evaporation of the solvent, the residue was dissolved in methanol (150 ml) and heated to reflux. To this solution was added of ammonium persulfate (2.3 g) in 20 ml of water. After 30 min. a further portion of 1.2 g of persulfate in 5 ml of water was added. After refluxing for one hour the solution was cooled and concentrated under vacuum. The residue was chromatographed over silica with 9:1 chloroform/methanol to give 3.52 g (51% yield) of the subtitle compound. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine; In dichloromethane; | B. 4-methoxy-2-p-toluenesulfonyloxymethylpyridine The <strong>[16665-38-6]2-hydroxymethyl-4-methoxypyridine</strong>, (3.48 g, 0.024 mol) was dissolved in 50 ml CH2 Cl2 and cooled to 0 C. The p-toluenesulfonyl chloride (5.7 g, 0.03 mol) was added followed by triethylamine (5 g), in 10 ml of CH2 Cl2. After 15 minutes, the reaction was stirred at room temperature for one hour. The reaction was diluted with CH2 Cl2 (200 ml) and washed with water. The organic layer was separated and dried with MgSO4, filtered and concentrated to afford 7.3 g of crude subtitle compound suitable for further use. | |
With triethylamine; In CH2Cl2and; dichloromethane; | B. 4-methoxy-2-p-toluenesulfonyloxymethylpyridine The <strong>[16665-38-6]2-hydroxymethyl-4-methoxypyridine</strong>, (3.48 g, 0.024 mol) was dissolved in 50 ml CH2Cl2and cooled to 0C. The p-toluenesulfonyl chloride (5.7 g, 0.03 mol) was added followed by triethylamine (5 g), in 10 ml of CH2Cl2. After 15 minutes, the reaction was stirred at room temperature for one hour. The reaction was diluted with CH2Cl2(200 ml) and washed with water. The organic layer was separated and dried with MgSO4, filtered and concentrated to afford 7.3 g of crude subtitle compound suitable for further use. | |
With potassium hydroxide; In tetrahydrofuran; at 0 - 5℃; for 12.1667h;Inert atmosphere; | Synthesis of 2-azidomethyl-4-methoxypyridine.[0298] 2-Hydroxymethyl-4-methoxypyridine (278 mg, 2.0 mmol) was dissolved in tetrahydrofuran (15 mL) in a 50 mL round-bottomed flask under argon. The flask was cooled to 0-5 C with an ice/water bath for 10 minutes at which time, powdered OH (157 mg, 2.8 mmol) was added followed by /?erra-toluenesulfonyl chloride (pTsCl). The reaction was stirred for 12 hours, at which time diethyl ether (30 mL) was added. The mixture was transferred to a separatory funnel, and a saturated solution of NaHCC>3 (40 mL) was added. The organic layer was dried with MgSC>4, filtered, and concentrated to a residue, which was chromatographed on a silica gel column with a 10% to 50% gradient of ethyl acetate/hexanes. Rf = 0.69 (ethyl acetate, 254 nm UV). This material was then dissolved in N,N-dimethylformamide (5 mL), and sodium azide (266mg, 4.09 mmol) was added and the reaction was stirred at ambient temperature for 16 hours, at which time the reaction mixture was diluted with diethyl ether (30 mL) and washed with a saturated solution of NaHCC>3 (3 x 30 mL), then with brine (25 mL), dried with MgS04, filtered and concentrated in vacuo. The resulting residue was chromatographed over silica gel with a 15% to 50% gradient of ethyl acetate/hexanes to furnish 100 mg (30% yield) of this compound as a light yellow oil. Rf = 0.68 (ethyl acetate, 254 nm UV). NMR (400MHz, CDCh): 8.34 (d, J= 5.6 Hz, 1H,), 6.81 (d, J= 2.4 Hz 1 H), 4.39 (s, 2H), 3.81 (s, |
With potassium hydroxide; | Example 315 Synthesis of (4-methoxypyridin-2-yl)methyl 4-methylbenzenesulfonate. To a solution of <strong>[16665-38-6](4-methoxypyridin-2-yl)methanol</strong> (10 g, 71.86 mmol) in THF (300 mL) was added potassium hydroxide (6.05 g, 107.8 mmol) followed by tosyl chloride (16.45 g, 86.24 mmol) at 0 C. the reaction mixture was warmed to RT with stirring for 12 h, and filtered with Celite. The filtrate was concentrated to afford (4-methoxypyridin-2-yl)methyl 4-methylbenzenesulfonate (21.0 g, crude) as a yellow oil which was used in the next step without purification. ESI-MS [M+H]+: 294.0. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In diethyl ether; | A solution of lithium aluminium hydride (1M in diethyl ether, 16 ml) was added dropwise to a stirred mixture of methyl 4-methoxypyridine-2-carboxylate (2.7 g) and diethyl ether (50 ml). The resultant mixture was heated to reflux for 1 hour. The mixture was treated with potassium sodium tartrate tetrahydrate and extracted with ethyl acetate. The organic phase was dried (MgSO4) and evaporated. The residue was purified by column chromatography using increasingly polar mixtures of methylene chloride and methanol as eluent to give 4-methoxypyrid-2-ylmethanol (0.8 g); NMR Spectrum: 3.62 (s, 3H), 4.51 (d, 2H), 5,34 (broad t, 1H), 6.8 (m, 1H), 6.99 (d, 1H), 8.27 (d, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
6.9% | With tributylphosphine; di-isopropyl azodicarboxylate; In tetrahydrofuran; at 20℃; for 0.166667h; | [0334] In a round bottom flask, ethyl (2S)-2-ethoxy-3-(4-hydroxyphenyl)propanoate (0.1084 g, 0.4549 mmol) was dissolved in tetrahydrofuran (5.00 mL) and (4-methoxypyridin-2- yl)methanol (0.278 g, 2.00 mmol) was added. Tributylphosphine (390 uL, 1.6 mmol) and diisopropyl azodicarboxylate (310 uL, 1.6 mmol) were then added sequentially to the abovementioned solution. After 10 mins, the reaction is interpreted to be complete by HPLC- MS analysis. The reaction mixture is concentrated in vacuo and purified by CombiFlash Rf (C18aq Gold 30g column, 0.1%TFA in MeCN: 0.1%TFA in water gradient, fractions collected on 214 nM). The appropriate fractions (HPLC-MS) were combined and reduced in volume to 10 mL of water. The aqueous solution is made basic with saturated sodium bicarbonate and extracted with ether (3x 10 mL). The organic layer is dried over Na2S04, filtered and concentrated in vacuo to give ethyl (2S)-2-ethoxy-3-{4-[(4-methoxypyridin-2- yl)methoxy]phenyl}propanoate (11.2 mg; 6.9%;) as an oil. [0335] 1H NMR (300 MHz, CHLOROFORM-d) delta ppm 1.18 (t, J=7.0 Hz, 3 H), 1.23 (t, J=7.1 Hz, 3 H), 2.93 - 3.00 (m, 2 H), 3.36 (m, 1 H), 3.62 (m, 1 H), 3.91 (s, 3 H), 3.98 (t, J=6.7 Hz, 1 H), 4.17 (q, J=7.1 Hz, 2 H), 5.24 (s, 2 H), 6.83 (dd, J=5.8, 2.3 Hz, 1 H), 6.93 (d, J=8.8 Hz, 2 H), 7.14 (d, J=2.3 Hz, 1 H), 7.18 (d, J=8.8 Hz, 2 H), 8.43 (d, J=5.9 Hz, 1 H). [0336] HPLC retention Time: 3.128 min [0337] LCMS: 360.0 (M+H)+ |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; 4-methoxypyridine N-oxide; 2-chloro-5,5-dimethyl[1,3,2]dioxaphosphinane 2-oxide; at 20℃; for 16h; | DMOCP (3,8 g; 20.5 mmol) was added to a solution of nucleoside phosphonic acid, Pic-OH (1.7 g; 12.3 mmol) and MPNO (2.6 g; 20.5 mmol) in pyridine (45 mL). The reaction mixture was stirred for 16 h at r.t., quenched by the addition of 2M TEAB (20 mL) and evaporated. The residue was dissolved in chloroform (0.5 L) and extracted with 0.2 M TEAB (3 x 100 ml). The organic layer was dried over anhydrous sodium sulfate, evaporated and coevaporated with dioxane. The crude diPic phosphonate was then treated 6 h at r.t. with benzenethiol (6 mL) and TEA (8.4 mL) in dioxane (45 mL) The reaction mixture was diluted with ethyl acetate and directly purified by chromatography on silica gel (elution with gradient of 0-100% ethyl acetate/ethanol/acetone/water 4: 1 : 1 : 1 in ethyl acetate (S1O2 buffered with TEA). Intermediate 8 was lyophilized from dioxane to yield 2.4 g (66%): HRMS (ESI) calcd for C46H43FN6O10P (M-H)- 889.27623, found 889.27583; 1H NMR (DMSO-d6) d 11.25 (br s, 1H), 8.74 (s, 1H), 8.67 (s, 1H), 8.26 (d, J= 5.7 Hz, 1H), 8.04 (m, 2H), 7.64 (m, 1H), 7.54 (m, 2H), 7.27 (m, 2H), 7.19 (m, 2H), 7.14 (m, 5H), 7.04 (d, J= 2.6 Hz, 1H), 6.81 (dd, J= 5.7, 2.6 Hz, 1H), 6.76 (m, 4H), 6.43 (dd, J= 18.6, 1.6 Hz, 1H), 6.01 (ddd, J= 51.8, 4.0, 1.6 Hz, 1H), 4.90 (ddd, J= 22.3, 8.1, 4.0 Hz, 1H), 4.80 (dd, J= 14.3, 7.5 Hz, 1H), 4.78 (dd, J= 14.3, 7.5 Hz, 1H), 4.20 (ddd, J= 8.1, 5.0, 2.5 Hz, 1H), 3.77 (s, 3H), 3.67 (s, 6H), 3.64 (m, 2H), 3.31 (dd, J = 11.0, 2.5 Hz, 1H), 3.22 (dd, = 11.0, 5.0 Hz, 1H);31P NMR (DMSO-fife) d 12.48;19F NMR (DMSO-fife) d -199.61. |
Tags: 16665-38-6 synthesis path| 16665-38-6 SDS| 16665-38-6 COA| 16665-38-6 purity| 16665-38-6 application| 16665-38-6 NMR| 16665-38-6 COA| 16665-38-6 structure
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