溴甲苯 、
4,4'-dimethoxy-2,2',5,5'-tetrakis(methoxycarbonyl)1,1'-dimethyl-3,3'-bipyrrole 在
lithium hydroxide 、
四丁基碘化铵 、
potassium carbonate 作用下,
生成 4,4'-Dimethoxy-1,1'-dimethyl-1H,1'H-[3,3']bipyrrolyl-2,5,2',5'-tetracarboxylic acid 2,5'-dibenzyl ester 5,2'-dimethyl ester 、 4,4'-Dimethoxy-1,1'-dimethyl-1H,1'H-[3,3']bipyrrolyl-2,5,2',5'-tetracarboxylic acid 5,5'-dibenzyl ester 2,2'-dimethyl ester 、
2,2'-bis<(benzyloxy)carbonyl>-4,4'-dimethoxy-5,5'-bis(methoxycarbonyl)-1,1'-dimethyl-3,3'-bipyrrole