乙氧甲酰基亚甲基三苯基膦 、 5-formyl-3-methyl-1H-pyrrole-2,4-dicarboxylic acid 2-tert-butyl ester 4-ethyl ester 在
silica gel 、
5-(2-ethoxycarbonylvinyl)-3-methyl-1H-pyrrole-2,4-dicarboxylic acid 2-tert-butyl ester 4-ethyl ester 作用下,
以
四氢呋喃 为溶剂,
反应 12.0h,
以to obtain the title compound 5-(2-ethoxycarbonyl-vinyl)-3-methyl-1H-pyrrole-2,4-dicarboxylic acid 2-tert-butyl ester 4-ethyl ester 1c (24 g, yield 84%) as a pale yellow solid的产率得到5-(2-ethoxycarbonylvinyl)-3-methyl-1H-pyrrole-2,4-dicarboxylic acid 2-tert-butyl ester 4-ethyl ester