6-{1-[4-(3,3-dimethyl-2-oxo-butoxy)-3-methyl-phenyl]-1-ethyl-propyl}-benzofuran-2-carboxylic acid ethyl ester 、
sodium hydroxide 、
甲醇 以
四氢呋喃 为溶剂,
以to give the title compound (880 mg, 96%)的产率得到6-{1-[4-(3,3-dimethyl-2-oxo-butoxy)-3-methyl-phenyl]-1-ethyl-propyl}-benzofuran-2-carboxylic acid