Structure of 90365-74-5
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CAS No. : | 90365-74-5 |
Formula : | C11H15NO2 |
M.W : | 193.24 |
SMILES Code : | O[C@H]1CN(CC2=CC=CC=C2)C[C@@H]1O |
MDL No. : | MFCD01073893 |
InChI Key : | QJRIUWQPJVPYSO-QWRGUYRKSA-N |
Pubchem ID : | 2734057 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 14 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.45 |
Num. rotatable bonds | 2 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 2.0 |
Molar Refractivity | 57.66 |
TPSA ? Topological Polar Surface Area: Calculated from |
43.7 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.73 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.3 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
-0.31 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.58 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
0.83 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
0.63 |
Log S (ESOL):? ESOL: Topological method implemented from |
-1.41 |
Solubility | 7.48 mg/ml ; 0.0387 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-0.78 |
Solubility | 32.1 mg/ml ; 0.166 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-1.64 |
Solubility | 4.43 mg/ml ; 0.0229 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
No |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-7.27 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.97 |
* 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% | Stage #1: With hydrogen; acetic acid In ethanol at 20℃; for 7 h; Stage #2: With hydrogenchloride In 1,4-dioxane |
To a solution of (3S,4S)-1-benzylpynolidne-3,4-diol (522 mg) in ethanol (15 mL) were added 10percent palladium-carbon (100 mg) and acetic acid (10 mL), and the mixture was reacted under pressurized hydrogen (40psi) at room temperature for 7 hours in Parr hydrogenation apparatus. The reaction solution was filtered through Celite, and the filtrate was concentrated under reduced pressure. To the resulting residue was added 4N hydrochloric acid-dioxane solution, and then the mixture was concentrated under reduced pressure to give the titled compound (373 mg) as a yellow solid (yield 99percent). MS(APCI)m/z; 104[M+H]+. |
90.9% | With palladium 10% on activated carbon; hydrogen In ethanol; water at 20℃; for 48 h; | Intermediate ((3S, 4S) -5) (77.3g, 0.4mol) was dissolved in 80percent aqueous ethanol (2.4L) was added 10percent Pd / C (7.0g), at room temperature through hydrogen (0.07MPa) reaction 2d. The catalyst was removed by filtration and the filtrate concentrated under reduced pressure, the residue was treated with absolute ethanol (2 × 250mL) with traces of water addition to give a yellow oil of Intermediate ((3S, 4S) -6) 37.5g, yield 90.9percent. |
90.9% | With palladium 10% on activated carbon; hydrogen In ethanol; water at 20℃; for 48 h; | Intermediate ((3S,4S)-5) (77.3 g, 0.4 mol) was dissolved in an aqueous solution of ethanol (80percent), to which10percent Pd/C (7.0 g) was added. Hydrogen (0.07 MPa) was supplied, and the reaction was kept for 2 days at room temperature.The catalyst was filtered off, and the filtrate was concentrated under reduced pressure. Anhydrous ethanol(23250 mL) was used to remove the trace amount of water from the residue to obtain intermediate ((3S,4S)-6) as ayellow oil (37.5 g, yield: 90.9percent).MASS (ESI+) m/z = 104 (M+H)+.1 H NMR (400 MHz, DSO-d6): 2.60 (m, 2H), 3.02 (m, 2H), 3.83 (m, 2H), 4.81 (br s, 3H). |
90.9% | With palladium 10% on activated carbon; hydrogen In ethanol; water at 20℃; for 48 h; | The intermediate ((3S, 4S)-5) (77.3 g, 0.4 mol) Soluble in 80percent aqueous ethanol solution (2.4L),Add 10percent Pd/C (7.0g),The reaction was carried out at room temperature with hydrogen (0.07 MPa) for 2 d.The catalyst was removed by filtration, and the filtrate was concentrated under reduced pressure.The residue was stripped of water with anhydrous ethanol (2×250 mL) to give a yellow oily intermediate ((3S, 4S)-6) 37.5 g, yield: 90.9percent. |
83% | With palladium 10% on activated carbon; hydrogen In ethanol at 20℃; for 24 h; | General procedure: 10 percent Pd/C (1.50 g) was added to solution of 3a (7.50 g, 38.86 mmol) in ethanol (40 mL) under argon atmosphere, hydrogenated under 100 psi at room temperature for 24 h. The reaction mixture was filtered through celite pad, filtrate was evaporated in vacuo to get crude. The crude product was washed with n-pentane-diethyl ether mixture (1:1) (20 mL), decanted the organic layer and dried in vacuo yielding 3.28 g (82.0 percent) of light brown solid of compound 4a. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | To a solution of (3S,4S)-1-benzylpynolidne-3,4-diol (522 mg) in ethanol (15 mL) were added 10percent palladium-carbon (100 mg) and acetic acid (10 mL), and the mixture was reacted under pressurized hydrogen (40psi) at room temperature for 7 hours in Parr hydrogenation apparatus. The reaction solution was filtered through Celite, and the filtrate was concentrated under reduced pressure. To the resulting residue was added 4N hydrochloric acid-dioxane solution, and then the mixture was concentrated under reduced pressure to give the titled compound (373 mg) as a yellow solid (yield 99percent). MS(APCI)m/z; 104[M+H]+. | |
90.9% | With palladium 10% on activated carbon; hydrogen; In ethanol; water; at 20℃; under 525.053 Torr; for 48h; | Intermediate ((3S, 4S) -5) (77.3g, 0.4mol) was dissolved in 80percent aqueous ethanol (2.4L) was added 10percent Pd / C (7.0g), at room temperature through hydrogen (0.07MPa) reaction 2d. The catalyst was removed by filtration and the filtrate concentrated under reduced pressure, the residue was treated with absolute ethanol (2 × 250mL) with traces of water addition to give a yellow oil of Intermediate ((3S, 4S) -6) 37.5g, yield 90.9percent. |
90.9% | With palladium 10% on activated carbon; hydrogen; In ethanol; water; at 20℃; under 525.053 Torr; for 48h; | Intermediate ((3S,4S)-5) (77.3 g, 0.4 mol) was dissolved in an aqueous solution of ethanol (80percent), to which10percent Pd/C (7.0 g) was added. Hydrogen (0.07 MPa) was supplied, and the reaction was kept for 2 days at room temperature.The catalyst was filtered off, and the filtrate was concentrated under reduced pressure. Anhydrous ethanol(23250 mL) was used to remove the trace amount of water from the residue to obtain intermediate ((3S,4S)-6) as ayellow oil (37.5 g, yield: 90.9percent).MASS (ESI+) m/z = 104 (M+H)+.1 H NMR (400 MHz, DSO-d6): 2.60 (m, 2H), 3.02 (m, 2H), 3.83 (m, 2H), 4.81 (br s, 3H). |
90.9% | With palladium 10% on activated carbon; hydrogen; In ethanol; water; at 20℃; for 48h; | The intermediate ((3S, 4S)-5) (77.3 g, 0.4 mol) Soluble in 80percent aqueous ethanol solution (2.4L),Add 10percent Pd/C (7.0g),The reaction was carried out at room temperature with hydrogen (0.07 MPa) for 2 d.The catalyst was removed by filtration, and the filtrate was concentrated under reduced pressure.The residue was stripped of water with anhydrous ethanol (2×250 mL) to give a yellow oily intermediate ((3S, 4S)-6) 37.5 g, yield: 90.9percent. |
83% | With palladium 10% on activated carbon; hydrogen; In ethanol; at 20℃; under 5171.62 Torr; for 24h; | General procedure: 10 percent Pd/C (1.50 g) was added to solution of 3a (7.50 g, 38.86 mmol) in ethanol (40 mL) under argon atmosphere, hydrogenated under 100 psi at room temperature for 24 h. The reaction mixture was filtered through celite pad, filtrate was evaporated in vacuo to get crude. The crude product was washed with n-pentane-diethyl ether mixture (1:1) (20 mL), decanted the organic layer and dried in vacuo yielding 3.28 g (82.0 percent) of light brown solid of compound 4a. |
With hydrogen;palladium on activated charcoal; In methanol; | (i) 3S,4S-Dihydroxy-pyrrolidine-1-carboxylic acid benzyl ester Pd on C (300 mg) was added to a solution of (3S,4S)-(+)-benzyl-3,4-pyrrolidindiol (2.5 g, 12.9 mmol, commercially available) in MeOH. The reaction mixture was stirred under H2 balloon overnight, filtered thought Celite and concentrated under reduced pressure. The residue was dissolved in 1,4-dioxane (10 mL) and 6percent Na2CO3 was added to adjust pH ~10. Benzyl chloroformate (3.69 mL, 25.87 mmol) was added to the reaction mixture (during addition of benzyl chloroformate, 6percent Na2CO3 was added to adjust pH ~9). The reaction mixture was stirred at room temperature for 2 hours and concentrated under reduced pressure. The residue was taken into water (50 mL) and extracted with EtOAc (2*50 mL). The organic layers were dried over MgSO4 and concentrated. The residue was purified by column chromatography (2percent CH3OH in CH2Cl2) to give colorless oil (1.51 g, 51percent). 1H NMR (300 MHz, CDCl3) delta7.28-7.34 (5H, m), 5.10 (1H, s), 4.12 (2H, m), 3.65-3.70 (2H, m), 3.36-3.43 (2H, m), 2.83 (1H, bs), 2.65 (1H, bs). | |
With hydrogen; acetic acid;10% palladium on charcoal; In methanol; under 2585.81 Torr; for 24h; | To a solution of SLnHK-01-3a (S,S) (5.0 g, 0.02 mol) in MeOH (35 mL) was added AcOH (15 mL) followed by addition of Pd/C (1.6 g). The mixture was then exposed to H2 at 50 psi for 24 h. The mixture was filtered through celite pad and filtrate was concentrated under reduced pressure to afford SLnHK-01-3 (S,S) (2.5 g, crude). The crude material was taken up for next step without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With triethylamine; In dichloromethane; | (3S, 4S) -1-benzyl-3,4-pyrrolidanediol (6 g, 31 mmol) was dissolved in anhydrous dichloromethane (150 ml)Triethylamine (12.8 ml, 93 mmol) was added dropwise, and then methanesulfonyl chloride (5.8 ml, 74 mmol) was added dropwise to the reaction system at 0 ° C. After completion of the dropwise addition, the mixture was stirred at room temperature for 12 hours.After completion of the reaction, the mixture was washed with water, saturated sodium bicarbonate and saturated brine, and dried over anhydrous sodium sulfate. (Petroleum ether: ethyl acetate = 3: 1) to give 7 g of (3S, 4S) -1-benzyl-3,4-pyrrolidanediol dimethanesulfonate (yellow solid , Yield 65percent). |
25.2 g | With triethylamine; In dichloromethane; at 0 - 20℃; for 0.5h; | 16.0g <strong>[90365-74-5](3S,4S)-(+)-1-benzylpyrrolidine-3,4-diol</strong> and 23.1 ml triethylamine were dissolved in 50 ml dichloromethane. At 0°C, add dropwise 12.9 ml methanesulfonyl chloride. Raise the temperature to room temperature and react for 30min. Afterwards use 30 ml deionized water extraction twice, the organic phase by the 300 ml of 1 mol/L hydrochloric acid solution after washing off the aqueous phase, the aqueous phase then 100 ml caustic soda solution to wash the adding 60 ml dichloromethane, to retain the liquid organic phase, reduced pressure to remove the solvent to obtain the 25.2g solid (3S,4S)-1-benzyl-3,4-bis(methanesulfonyloxy)pyrrolidine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | With lithium aluminium tetrahydride; In tetrahydrofuran; at 0℃; for 24h;Reflux; | To a suspension of LiAlH4 (5.1 g, 135 mmol) in 200mL dry THFwas added dropwise a solution of (3R,4R)-1-benzyl-3,4-dihydroxypyrrolidine-2,5-dione (2a) (10 g, 45 mmol) in 300mL dry THF at 0 C. The reaction was then heated to reflux for another24 h. The reaction mixture was cooled to 0 C and quenched withH2O (5.1 mL)/15% NaOH (5.1 mL)/H2O (15.3 mL) in turn, followed bythe addition of 300mL EtOAc. After stirring at R.T. for 15 min, theobtained suspension was filtered on a pad of celite (washing withEtOAc) and the filtrate was evaporated in vacuum, purified by flashchromatography (DCM:MeOH 30:1) to afford 3a as light brownsolid (6.2 g, 73%). M.p.: 94-96 C. 1H NMR (400 MHz, DMSO-d6)d 2.34 (dd, J 4.4 Hz, 9.6 Hz, 2H), 2.77-2.81 (m, 2H), 3.49-3.63 (m,2H), 3.89 (t, J 4.0 Hz, 2H), 4.89 (brs, 2H), 7.25e7.36 (m, 5H); 13CNMR (100 MHz, DMSO-d6) d 60.0, 60.8, 77.6, 126.8, 128.1, 128.6,139.0; HRMS (ESI) m/z calcd for C11H15NO2 [MH] 194.1176, found194.1178. [alpha]D 20 = 7.2 (c = 0.56, CHCl3). |
71% | With lithium aluminium tetrahydride; In tetrahydrofuran; at 0℃; for 12h;Inert atmosphere; Reflux; | Under nitrogen, cooled to LiAlH4 0 after (61.2g, 1.6mol) in tetrahydrofuran (3.6L) was slowly added a solution of Intermediate ((3R, 4R) -4) (132.7g, 0.6mol). The reaction mixture was refluxed for 12h, cooled to room temperature, ethyl acetate was added dropwise in an ice-water bath (144mL). Distilled water was added dropwise with vigorous stirring followed (61.2mL), 5% NaOH (61.2mL) and distilled water (183.6mL). Filter cake was washed with hot tetrahydrofuran (2 × 1.2L) and washed. The combined filtrate and washings were concentrated under reduced pressure, the residue was separated and purified by silica gel column to give a pale yellow oil which was recrystallized from ethyl acetate as a white solid intermediate ((3S, 4S) -5) 82.3g, yield 71.0%. |
71% | With lithium aluminium tetrahydride; In tetrahydrofuran; at 0℃; for 12h;Inert atmosphere; Reflux; | Under a nitrogen atmosphere, intermediate ((3R,4R)-4) (132.7 g, 0.6 mol) was slowly added to a solution ofLiAlH4 (61.2 g, 1.6 mol) in tetrahydrofuran (3.6 L) which was cooled to 0C. The reaction mixture was refluxed for 12 h,and cooled to room temperature. Ethyl acetate (144 mL) was added dropwise to the reaction mixture in a cold waterbath. Distilled water (61.2 mL), 5% NaOH (61.2 mL) and distilled water (183.6 mL) were sequentially added dropwiseunder vigorous stirring. The mixture was filtered, and the filter cake was washed with hot tetrahydrofuran (231.2 L). Thefiltrate and wash solution were combined and concentrated under reduced pressure. The residue was separated on asilica gel column to obtain a light yellow oil, which was then recrystallized with ethyl acetate to obtain intermediate((3S,4S)-5) as a white solid (82.3 g, yield: 71.0%).MASS (ESI+) m/z = 194 (M+H)+.1 H NMR (400 MHz, DSO-d6): 2.30 (dd, 2H), 2.74 (dd, 2H), 3.46 (d, 1H), 3.57 (d, 1H), 3.84 (m, 2H), 4.84 (br s, 2H),7.20-7.35 (m, 5H). |
71% | With lithium aluminium tetrahydride; In tetrahydrofuran; at 0℃; for 12h;Inert atmosphere; Reflux; | Under the protection of nitrogen,The intermediate ((3R, 4R)-4) (132.7 g, 0.6 mol) was slowly added to a solution of LiAlH4 (61.2 g, 1.6 mol) in tetrahydrofuran (3.6 L) after cooling to 0 C.The reaction mixture was refluxed for 12 h.After cooling to room temperature, ethyl acetate (144 mL) was added dropwise in ice water.Distilled water (61.2 mL) was added dropwise under vigorous stirring.5% NaOH (61.2 mL) and distilled water (183.6 mL).Filter and filter cake was washed with hot tetrahydrofuran (2 x 1.2 L).The filtrate and washings were combined and concentrated under reduced pressure.The residue was purified on a silica gel column to give a pale yellow oil.After recrystallization from ethyl acetate, the title compound ((3S, 4S)-5)The yield was 71.0%. |
69% | With lithium aluminium tetrahydride; In tetrahydrofuran; at -5 - 95℃; for 12h; | Lithium aluminum tetrahydrate (5 g, 132 mmol)Was dissolved in anhydrous tetrahydrofuran (100 ml)A solution of (3R, 4R) -1-benzyl-3,4-dihydroxy-2,5-pyrrolidinedione (10 g, 45 mmol) in dry tetrahydrofuran was added at -5 C. After completion of the dropwise addition, The reaction was allowed to proceed to 95 C for 12 hours,Cooled to room temperature, 6.8 g of water was added dropwise to the reaction system, and the floc was present. Then, 6.8 g of 20% NaoH solution and 20.4 g of water were added. Filtered and purified under reduced pressure and purified by silica gel column chromatography (dichloromethane: methanol = 50: 1)To give 6 g of (3S, 4S) -1-benzyl-3,4-pyrrolidine diol (pale yellow solid in 69% yield). |
61% | The (3R,4R)-l-benzyl-3,4-dihydroxypyrrolidine-2,5-dione (0.98 g, 4.4 mmol) <n="124"/>in THF (20 ml) was added slowly to a stirring solution Of LiAlH4 (4.75 ml, 11.87 mmol of 2.5 M solution in THF) in THF cooled to -5C. After complete addition, the reaction was warmed to room temperature, then heated at reflux overnight. The reaction was cooled to room temperature, then quenched with saturated aqueous NH4Cl until further addition produced no more bubbling. The reaction was diluted with ethyl acetate (20 ml), filtered, and the solid washed with ethyl acetate. The combined filtrates were concentrated, and the residue purified by silica flash chromatography (gradient elution, using EtOAc, and 9: 1 EtOAc-EtOH) to provide the title compound as a tan solid (0.52 g, 61%). | |
45% | To a stirred solution of boron trifluoride ethyl etherate (23 mL, 0.16 mol) in DME (120 mL) were added SLnHK-01-2a (10 g, 0.04 mol) and sodium borohydride (6.2 g, 0.16 mol) at 0 C. The mixture was stirred at 70 C. for 2 h. Then 6 N HCl (62.5 mL) was added slowly at 70 C., stirred for 15 min. Sodium fluoride (28 g) was added and the mixture was heated at reflux temperature for 30 min. The mixture was cooled to room temperature, 20% aq. NaOH (53 mL) was added and the resulting mixture was filtered. The organic phase was isolated, evaporated to dryness and obtained residue was partitioned between water and diethyl ether. The water phase was extracted with diethyl ether (2x100 mL). The combined organic phases were dried over MgSO4, evaporated to dryness and obtained crude material was recrystallized from ethyl acetate to obtain SLnHK-01-3a (S,S) (7.0 g, 45%) as white crystals.1H NMR (200 MHz, CDCl3): delta 7.34-7.25 (m, 5H), 4.04 (t, J=4.2 Hz, 2H), 3.58 (d, J=7.8 Hz, 2H), 2.92-2.88 (m, 2H), 2.44-2.40 (m, 2H). | |
12% | With borane-THF; In tetrahydrofuran; at 20 - 60℃; for 2h; | To a mixture of (3R,4R)-1-benzyl-3,4-dihydroxypyrrolidine-2,5-dione (44 g, 199 mmol, 1.0 eq) and THF (176 mL) at 20 C. (vessel jacket temperature) was added borane-tetrahydrofuran complex (1.0 mol/L) in THF (800 mL, 800 mmol, 1.0 mol/L, 4.0 eq) at a rate to maintain the temperature between 20 C. and 25 C. Over 1 hr, the jacket temperature was ramped to 60 C. and then held for 1 hr. Upon completion, the reaction was cooled to 30 C. and quenched by the slow dropwise addition of MeOH (97 mL, 12 eq) to the mixture at a rate to control off gassing. The reaction mixture was then heated to reflux and concentrated to a low stir volume. The reaction solvent THF was then replaced by a constant volume displacement with MeOH (total of 1.5 L). Once the THF content had been reduced to less than 1 wt %, MeOH was replaced by a constant volume displacement with EtOAc (total of 1.5 L) to reduce the MeOH content to less than 1 wt %. The total volume of EtOAc was then readjusted to about 250 mL (6 vol) and then cooled to 5 C. to crystallize the product. The desired product was isolated by filtration, washed with cold EtOAc (88 mL) and dried to give title compound (27.0 g, 140 mmol, 70%). A second crop of product was isolated by concentration of the combined filtrate and cake wash to half volume, which was then cooled to 5 C., filtered and washed with cold EtOAc (50 mL) to afford additional title compound (4.5 g, 23 mmol, 12%). 1H NMR (400 MHz, DMSO-d6) delta ppm 7.33-7.26 (m, 4H) 7.25-7.20 (m, 1H) 4.48 (d, J=4.8 Hz, 2H) 3.38-3.31 (m, 2H), 3.57 (d, J=13.0 Hz, 1H) 3.46 (d, J=13.0 Hz, 1H) 2.74 (dd, J=9.4, 5.9 Hz, 2H) 2.30 (dd, J=9.4, 4.4 Hz, 2H). m/z (EI+) for C11H15NO2 194.2 (M+H)+ |
The compound obtained in Referential Example 188 (11 g) was dissolved in tetrahydrofuran (110 mL), and lithium aluminium hydride (5.69 g) was added thereto in small portions under ice cooling. The thus-obtained mixture was heated to room temperature, and after 1 hour, the mixture was heated under reflux overnight. The resultant mixture was left to cool, and to the mixture were sequentially added water (5.7 mL), 15% aqueous sodium hydroxide (5.7 mL), water (17.1 mL) under ice cooling. The reaction mixture was brought back to room temperature, and was stirred for 1 hour. The resultant precipitate was filtered through Celite, and the filtrate was concentrated. The residue was recrystallized from ethyl acetate, to thereby give the title compound (6.35 g).1H-NMR(CDCl3) delta:2.40-2.44(2H, m), 2.88-2.92(2H, m), 3.58(each 1H, AB type d, J=7.8Hz), 4.04(2H, t, J=4.2Hz), 7.25-7.34(5H, m). | ||
With hydrogenchloride; sodium hydroxide; sulfuric acid; In methanol; 1,2-dimethoxyethane; dichloromethane; water; ethyl acetate; toluene; | Example 6 A solution of 32.2 ml (0.6 mole) sulfuric acid in 100 ml DME was added dropwise to a suspension of 66.4 g (0.3 mole) (3R,4R)-1-benzyl-3,4-dihydroxy-2,5-pyrrolidine dione (IIb) and 45.6 g (1.2 moles) sodium boron hydride in 400 ml 1,2-dimethoxyethane (DME) within 2.5 h at room temperature. The mixture was then agitated 4 h at 75 C. After it cooled off, 75 ml MeOH were added and the mixture rotated in to dryness. The residue was taken up in 300 ml water and compounded with 50 ml conc. hydrochloric acid. The mixture was then made alkaline and extracted with 200 ml toluene twice at 65 C. The extraction residue was taken up in 100 ml each of water and toluene, adjusted to be strongly acidic with hydrochloric acid and agitated overnight at room temperature. It was then made alkaline with 30% sodium hydroxide solution. After the addition of 200 ml toluene the organic phase was separated at 65 C. The aqueous phase was extracted again with 200 ml methylene chloride. After the organic phases were rotated in, 85 g oil remained. The latter was taken up in 400 ml ethyl acetate and washed twice with 80 ml water at 65 C. The ethyl-acetate phase was rotated in after drying over sodium sulfate. 60 g residue remained which was recrystallized from 150 ml ethyl acetate. 30.2 g (52.1%) (3S,4S)-1-benzyl-3,4-dihydroxypyrrolidine (IIIb) were obtained in two fractions. Melting point: 97-98 C. [alpha]D20: +33.5 (1.5, MeOH) C11H15NO2 calc.: C 68.37 H 7.82 N 7.25 193.25 obs.: C 68.30 H 7.98 N 7.32 | |
With sodium hydroxide; In tetrahydrofuran; water; | REFERENTIAL EXAMPLE 189 (3S,4S)-1-Benzyl-3,4-pyrrolidinediol: The compound (11 g) obtained in Referential Example 188 was dissolved in tetrahydrofuran (110 ml), and lithium aluminum hydride (5.69 g) was added portionwise to the solution under ice cooling. The mixture was heated to room temperature for 1 hour and heated under reflux and for additional a night. After allowing the reaction mixture to cool, water (5.7 ml), a 15% aqueous solution (5.7 ml) of sodium hydroxide and water (17.1 ml) were added under ice cooling in that order, and the mixture was heated to room temperature and stirred for 1 hour. After deposits were filtered through Celite, and the mother liquor was concentrated under reduced pressure, the resultant residue was recrystallized from ethyl acetate to obtain title compound (6.35 g). 1H-NMR (CDCl3) delta: 2.40-2.44(2H,m), 2.88-2.92(2H,m), 3.58(each 1H,AB type d,J=7.8 Hz), 4.04(2H,t,J=4.2 Hz), 7.25-7.34(5H,m). | |
With lithium aluminium tetrahydride; In tetrahydrofuran; at 0 - 20℃;Heating / reflux; | [Referential Example 189] (3S,4S)-1-Benzyl-3,4-pyrrolidinediol: The compound (11 g) obtained in Referential Example 188 was dissolved in tetrahydrofuran (110 ml), and lithium aluminum hydride (5.69 g) was added portionwise to the solution under ice cooling.. The mixture was heated to room temperature for 1 hour and heated under reflux and for additional a night.. After allowing the reaction mixture to cool, water (5.7 ml), a 15% aqueous solution (5.7 ml) of sodium hydroxide and water (17.1 ml) were added under ice cooling in that order, and the mixture was heated to room temperature and stirred for 1 hour.. After deposits were filtered through Celite, and the mother liquor was concentrated under reduced pressure, the resultant residue was recrystallized from ethyl acetate to obtain title compound (6.35 g).1H-NMR (CDCl3) delta: 2.40-2.44(2H,m), 2.88-2.92(2H,m), 3.58(each 1H,AB type d,J=7.8Hz), 4.04(2H,t,J=4.2Hz), 7.25-7.34(5H,m). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
35% | With 1H-imidazole; In N,N-dimethyl-formamide; at 20℃; | To a stirred solution of <strong>[90365-74-5](3S,4S)-1-benzyl-3,4-dihydroxypyrrolidine</strong> (1.00 g, 5.2 mmol) and 0 imidazole (0.71 g, 10.4 mmol) in DMF (10 mL) was added t-butyldimethylsilyl chloride (0.47 g, 3.1 mmol). The solution was stirred overnight at rt, diluted with Et2O (80 mL) and washed with water (2 x 35 mL). The combined water washes were back extracted with Et2O (30 mL). The combined Et2O layers were washed with brine (10 mL), dried over MgSO4 and concentrated to leave an oil (0.85 g). The crude product was applied to a 12-g silica cartridge and eluted with a 0-100% EtOAc 5 in hexanes gradient to afford (3S,4S)-1-benzyl-3-hydroxy-4-(t-butyldimethyI-silyloxy)pyrrolidine (0.56 g, 35%) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97% | The (3S,4S)-l-benzylpyrrolidine-3,4-diol (0.52 g, 2.7 mmol) was dissolved in ethanol (15 ml) and acetic acid (10 ml) and hydrogenated (50 psi H2) over 10percent Pd-C (100 mg) on a Parr apparatus for 6 hours. After filtering through Celite, and washing the filter cake with ethyl acetate, the combined filtrate and washings were concentrated. The residue was diluted with 4N HCl/dioxane (2 ml), methanol (5 ml), then toluene (40 ml) and concentrated. The residue was triturated with ethyl ether to provide the hydrochloride salt of the title compound as a tan solid (0.37 g, 97percent). 1H NMR (D2O, 400MHz) 4.35 (d, J=3.4 Hz, 2H), 3.54 (dd, J = 12.8 Hz, 3.4 Hz, 2H), 3.30 (d, J = 12.8 Hz, 2H). |
Tags: 90365-74-5 synthesis path| 90365-74-5 SDS| 90365-74-5 COA| 90365-74-5 purity| 90365-74-5 application| 90365-74-5 NMR| 90365-74-5 COA| 90365-74-5 structure
A352692 [163439-82-5]
(3R,4R)-1-Benzylpyrrolidine-3,4-diol
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A352692 [163439-82-5]
(3R,4R)-1-Benzylpyrrolidine-3,4-diol
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