反应详情

A solution of 4,5-dichloro-2-fluoro-benzoyl chloride (794.5 mg, 3.49 mmol) in dichloromethane (7.3 mL) was added drop-wise to a mixture of methyl 4-aminobenzoate (528.0 mg, 3.49 mmol), pyridine (847.6 μL, 10.48 mmol) and dichloromethane (11.0 mL) at 0° C. The reaction was stirred and allowed to warm up to room temperature over 1.5 hours. To the reaction, water (10 mL) was added. The solid was isolated by filtration, washed with water (2×10 mL) and hexane (2×10 mL) to yield methyl 4-[(4,5-dichloro-2-fluoro-benzoyl)amino]benzoate (955 mg, 80%) as a light pink solid. ESI-MS m/z calc. 341.00. found 342.2 (M+1)+; Retention time: 1.75 minutes (3 minutes run). 1H NMR (400 MHz, DMSO-d6) δ 10.90 (s, 1H), 8.03 (d, J=6.7 Hz, 1H), 8.02-7.95 (m, 2H), 7.93 (d, J=9.4 Hz, 1H), 7.88-7.76 (m, 2H), 3.84 (s, 3H) ppm.

1. additionwas added
2. customThe solid was isolated by filtration
3. washwashed with water (2×10 mL) and hexane (2×10 mL)