Acetonitrile → 3-(3-Bromophenyl)-3-oxopropanenitrile

n-Butyllithium (214 ml, 340 mmol, 1.6 M solution in hexane) was added dropwise to a solution of acetonitrile (23.8 ml, 460 mmol) in dry tetrahydrofuran (1000 ml) at −78° C. After stirring the reaction mixture for 20 min., a solution of 4-bromobenzoyl chloride in dry tetrahydrofuran (50 ml) was added dropwise over 20 min. After 1 h, saturated ammonium chloride was added (200 ml) and the reaction mixture was allowed to warm to room temperature. The product was extracted into ether and washed with 1 N hydrochloric acid (400 ml). The organics were removed in vacuo and the residue was redissolved in ethyl acetate. Ammonium hydroxide was added to give a solid which was filtered, redissolved in ethyl acetate and washed with 2 N hydrochloric acid. The organic layer was washed with brine, dried over sodium sulfate and concentrated in vacuo to give 2-(3-bromobenzoyl)-acetonitrile (16.6 g) as a solid.

1. waitAfter 1 h
2. extractionThe product was extracted into ether
3. washwashed with 1 N hydrochloric acid (400 ml)
4. customThe organics were removed in vacuo
5. dissolutionthe residue was redissolved in ethyl acetate
6. additionAmmonium hydroxide was added
7. customto give a solid which
8. filtrationwas filtered
9. dissolutionredissolved in ethyl acetate
10. washwashed with 2 N hydrochloric acid
11. washThe organic layer was washed with brine
12. dry with materialdried over sodium sulfate
13. concentrationconcentrated in vacuo

ORD record

ord-5d4eb10d5faa4436abdd46583027143c

Source dataset

uspto-grants-2002_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06444696B1