(+/-)-cis-(7,9-dihydroxy)-6,11-dimethoxy-9-ethenyl-7,8,9,10-tetrahydronaphthacene-5,12-dione 、 (tert-butyldimethylsilyl)trifluorometane sulfonate 在
2,6-二甲基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以80%的产率得到(+/-)-cis-7-<(tert-butyldimethylsilyl)oxy>-9-hydroxy-6,11-dimethoxy-9-ethenyl-7,8,9,10-tetrahydronaphthacene-5,12-dione