ethyl (E) 6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-3-methoxy-4-methyl-4-hexenoate 以
dichloromethane hexane 为溶剂,
以are obtained (E)-6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-3-methoxy-4-methyl-4-hexenoic acid, m.p. 133°-135° C. (hexane/methylene chloride)的产率得到6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-3-methoxy-4-methyl-4-hexenoic acid