1-benzylamino-3,4,5-trichloro-1H-pyrrole-2-carboxylic acid methyl ester 、
氯甲酰乙酸乙酯 以
1,4-二氧六环 为溶剂,
反应 0.5h,
以to give the desired product (278 mg) as colorless syrup的产率得到1-[benzyl-(2-ethoxycarbonyl-acetyl)-amino]-3,4,5-trichloro-1H-pyrrole-2-carboxylic acid methyl ester