(4R,5R)-(-)-1',11'-dimethoxy-6'-hydroxy-2,2,5-trimethyl-9',10'-dihydrospiro<1,3-dioxolane-4,8'(7'H)-naphthacene>-5',12'-dione 在
三氯化硼 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以29%的产率得到(R)-6,8-Dihydroxy-8-((R)-1-hydroxy-ethyl)-1,11-dimethoxy-7,8,9,10-tetrahydro-naphthacene-5,12-dione