Aluminium lithium hydride → 2-(3-Phenylpyrrolidin-3-yl)ethanol
Reaction equation
C([O:3][C:4](=O)[CH2:5][C:6]1([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH2:10][C:9](=O)[NH:8][CH2:7]1)C.[H-].[Al+3].[Li+].[H-].[H-].[H-]>O1CCCC1>[C:12]1([C:6]2([CH2:5][CH2:4][OH:3])[CH2:10][CH2:9][NH:8][CH2:7]2)[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 5 °C
Procedure
Combine (3-phenyl-5-oxopyrrolidin-3-yl)acetic acid ethyl ester (171 g, 0.69 mol) and tetrahydrofuran (2 L). Cool to about 5° C. Slowly, add over about 15 minutes a solution of lithium aluminum hydride in tetrahydrofuran (2.24 L, 1 M, 2.24 mol). After the addition is complete heat to about 60° C. After 18 hours, cool in an ice-bath. Slowly quench by adding a saturated aqueous solution of sodium potassium tartrate (208 mL). After the quench is complete, add Na2SO4 (100 g) and celite (150 g) and stir. After 3 hours, dilute the reaction mixture with tetrahydrofuran (2 L) and filter. Suspend the solids in diethyl ether (2 L) and and filter. Combine the filtrates and concentrate the in vacuo to give the title compound: mp; 106-110° C. Rf=0.12 (silica gel dichloromethane/methanol/concentrated aqueous ammonia, 9/1/0.1).
Workup
- additionAfter the addition
- temperatureis complete heat to about 60° C
- temperaturecool in an ice-bath
- customSlowly quench
- additionby adding a saturated aqueous solution of sodium potassium tartrate (208 mL)
- additionadd Na2SO4 (100 g) and celite (150 g)
- waitAfter 3 hours
- additiondilute the reaction mixture with tetrahydrofuran (2 L)
- filtrationfilter
- filtrationfilter
- concentrationconcentrate the in vacuo
Sources & evidence
- ORD record
- ord-e36cb7aeeb0247f6b104dc613ec25605
- Source dataset
- uspto-grants-2001_04
- Patent number
- US06211199B1
Reaction notes
Loading…