Pyridine → (2-Oxopyrrolidin-1-yl)acetonitrile

Temperature

0 °C

Dimethylformamide (4.65 mL, 60 mmol) was taken up in acetonitrile (100 mL) and the solution cooled to 0° C. with an ice bath. Oxalyl chloride (4.8 mL, 55 mmol), diluted with acetonitrile (20 mL) was added to the reaction dropwise. The mixture was stirred for 30 min, then 2-(2-oxopyrrolidin-1-yl)acetamide (7.11 g, 50 mmol) in 30 mL of acetonitrile was added slowly to the reaction. The mixture was allowed to stir for 30 min and pyridine (6.1 mL, 100 mmol) was added to the reaction in one portion. The reaction was stirred for an additional 30 min and the volatiles were removed in vacuo. Water was added to the residue which was extracted with ethyl acetate. The aqueous layer was acidified to pH 2 with 1 N HCl and further extracted with ethyl acetate. All the organic layers were combined, washed with brine, dried with sodium sulfate, concentrated and placed on a high vacuum line to afford a clear oil. Yield=4.4 g

1. additionwas added to the reaction dropwise
2. stirringto stir for 30 min
3. stirringThe reaction was stirred for an additional 30 min
4. customthe volatiles were removed in vacuo
5. additionWater was added to the residue which
6. extractionwas extracted with ethyl acetate
7. extractionfurther extracted with ethyl acetate
8. washwashed with brine
9. dry with materialdried with sodium sulfate
10. concentrationconcentrated
11. customto afford a clear oil

ORD record

ord-d4db21da155c49459041ace9abd1df87

Source dataset

uspto-grants-2010_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07786132B2