Hydrogen Bromide → HCID 86728478, compound

Participants

Reaction Conditions

Reaction Steps

To 2,5-difluoro-N-(2-methoxy-4-pyridyl)benzamide (2.60 g, 9.84 mmol) in acetic acid (15.60 mL) was added HBr 33% in acetic acid (12.1 mL of 33% w/v, 49.20 mmol) and the mixture was stirred at 90° C. for 5 h. Additional HBr (10 mL, 33% in acetic acid) was added and the mixture was stirred at 90° C. overnight. The mixture was cooled to room temperature and was poured into water (200 mL). The mixture was stirred and the solid was collected by filtration. The solid was washed with water (2×50 mL). The solid was slurried in hexanes (2×50 mL) and filtered to give 2,5-difluoro-N-(2-oxo-1H-pyridin-4-yl)benzamide (2.30 g, 9.19 mmol, 93%). ESI-MS m/z calc. 250.05. found 251.3 (M+1)+; Retention time: 1.16 minutes (3 minutes run). 1H NMR (400 MHz, DMSO-d6) δ 11.31 (s, 1H), 10.59 (s, 1H), 7.56 (ddd, J=8.2, 5.4, 3.0 Hz, 1H), 7.46 (pd, J=9.1, 4.4 Hz, 2H), 7.33 (d, J=7.2 Hz, 1H), 6.81 (d, J=2.0 Hz, 1H), 6.42 (dd, J=7.2, 2.1 Hz, 1H) ppm.

Provenance & Evidence