Ammonia → 4-(4-Chlorophenyl)butanamide

To a stirred solution of 4-(4-chlorophenyl)butanoic acid (3.97 g, 20.0 mmol) and 1-hydroxybenzotriazole hydrate (3.37 g, 22.0 mmol) in N,N-dimethylformamide (40 mL) at ambient temperature was added solid 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (4.21 g, 22 mmol). The resulting mixture was stirred at ambient temperature for 25 minutes, and a solution of ammonia in methanol (7M, 14.3 mL, 100 mmol) was added. After stirring at ambient temperature for a further 15 minutes, the reaction mixture was diluted with water (400 mL) and extracted with chloroform (100 mL). The organic layer was dried over sodium sulfate and concentrated. The residual oil was triturated with hexane to afford a solid, which was collected by filtration, washed with hexane, and dried under vacuum to afford 4-(4-chlorophenyl)butanamide as an off-white powder (2.40 g, 61% yield).

1. stirringAfter stirring at ambient temperature for a further 15 minutes
2. extractionextracted with chloroform (100 mL)
3. dry with materialThe organic layer was dried over sodium sulfate
4. concentrationconcentrated
5. customThe residual oil was triturated with hexane
6. customto afford a solid, which
7. filtrationwas collected by filtration
8. washwashed with hexane
9. customdried under vacuum

ORD record

ord-b7e6965524824d74b5bb849b68d8722d

Source dataset

uspto-grants-2013_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08569522B2