(Rac)-1-ethyl-7-methoxy-4a-methyl-4,4a,9,10-tetrahydro-3h-phenanthren-2-one 、
三溴化硼 在
crude product 作用下,
以
二氯甲烷 为溶剂,
反应 5.0h,
以v, stepwise gradient) as eluent to yield E64的产率得到(Rac)-1-ethyl-7-hydroxy-4a-methyl-4,4a,9,10-tetrahydro-3h-phenanthren-2-one