4-Biphenylcarbonsaeure-<6-<<4-(1-m-chlorphenyl-1-methylethoxy)carbonylbutyl>carbonylvinyl>-3-oxo-2-oxa-7-bicyclo<3.3.0>octylester> 在
sodium tetrahydroborate 、 zinc(II) chloride 作用下,
以
乙二醇二甲醚 为溶剂,
以95%的产率得到4-Biphenylcarbonsaeure-<6-<7-(1-m-chlorphenyl-1-methylethoxy)carbonyl-3-hydroxy-1-heptenyl>-3-oxo-2-oxa-7-bicyclo<3.3.0>octylester>