4-cyano-5-ethyl-3-(2'-hydroxy-biphenyl-4-yl)-thiophene-2-carboxylic acid ethyl ester 、
1-碘代丙烷 在
potassium carbonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 4.0h,
以72%的产率得到4-cyano-5-ethyl-3-(2'-propoxy-biphenyl-4yl)-thiophene-2-carboxylic acid ethyl ester