ethyl 10-[(3R,4R)-7-hydroxy-3-(4-hydroxyphenyl)-3-methylthiochroman-4-yl]-2-(4,4,5,5,5-pentafluoropentyl)decanoate 、
sodium hydroxide 、
盐酸 在
乙酸乙酯 、
magnesium sulfate 、 silica gel 、 Ethyl acetate hexane methylene-chloride 作用下,
以
water ethanol 为溶剂,
反应 4.0h,
以to give 10-[(3R,4R)-7-hydroxy-3-(4-hydroxyphenyl)-3-methythiochroman-4-yl]-2-(4,4,5,5,5-pentafluoropentyl)decanoic acid (1.8 g, Yield 91%) as a foam的产率得到10-[(3R,4R)-7-hydroxy-3-(4-hydroxyphenyl)-3-methyl-thiochroman-4-yl]-2-(4,4,5,5,5-pentafluoropentyl)decanoic acid