4-[2-[1-(2-cyano-3-hydroxybut-2-enonylamino)ethyl]-4-ethylsulfamoylbenzo[b]furan-7-yloxy]butyric acid ethyl ester 在
sodium hydroxide 作用下,
以
乙醇 为溶剂,
反应 2.5h,
以44.7%的产率得到4-[2-[1-(2-cyano-3-hydroxybut-2-enonylamino)ethyl]-4-ethylsulfamoylbenzo[b]furan-7-yloxy]butyric acid