反应详情

To 2-chloro-5-(chlorosulfonyl)-4-fluorobenzoic acid (1.092 g, 4.0 mmol) was added dichloromethane (10 mL), oxalyl chloride (2.8 mL) and one small drop of N,N-dimethylformamide. The mixture was stirred at room temperature overnight. The mixture was then concentrated to give 2-chloro-5-(chlorosulfonyl)-4-fluorobenzoyl chloride which was used without additional purification.

1. concentrationThe mixture was then concentrated