5-(1-Carboxy-1-methyl-ethoxy)-2-methyl-1H-indole-3-carboxylic acid benzyl ester 、
二乙胺 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 作用下,
以
乙酸乙酯 为溶剂,
以12%的产率得到5-(1-Diethylcarbamoyl-1-methyl-ethoxy)-2-methyl-1H-indole-3-carboxylic acid benzyl ester