Water → HCID 19920130, compound

0.1 mol of cyclopentanecarbonitrile in 50 ml of THF is added in a rapid dropwise manner to a solution, stirred at 78° C. under an argon atmosphere, of 0.1 mol of lithium diisopropylamide (prepared from 0.1 mol of diisopropylamine and 63 ml of 1.6M butyllithium in hexane) in 250 ml of anhydrous THF. The mixture is stirred for 5 minutes at this temperature before adding 0.11 mol of 1-bromo-2,2dimethoxyethane. The mixture is allowed to return to room temperature and is hydrolyzed using 150 ml of water. The medium is allowed to settle, and the aqueous phase is separated and extracted twice with 150 ml of ether. The combined organic phases are washed with 100 ml of aqueous saline solution and 100 ml of water and then dried over magnesium sulfate. The solvents are evaporated off under vacuum and the residual oil is distilled.

1. customto return to room temperature
2. customthe aqueous phase is separated
3. extractionextracted twice with 150 ml of ether
4. washThe combined organic phases are washed with 100 ml of aqueous saline solution and 100 ml of water
5. dry with materialdried over magnesium sulfate
6. customThe solvents are evaporated off under vacuum
7. distillationthe residual oil is distilled

ORD record

ord-e85a172ef8ca401e9781a735778ecac7

Source dataset

uspto-grants-1995_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05436343