1,3-dithian-2-yl tetrafluoroborate 、
(5aα,6α,9aα,9bα)-4-[(1,1-dimethylethyl)dimethylsilyloxy]-1,2,3,5,5a,6,9a,9b-octahydro-6-methoxy-8,9a-dimethyl-9H-benz[e]inden-9-one 以
硝基甲烷 、
二氯甲烷 为溶剂,
以59%的产率得到(3aα,5aα,6α,9aα,9bα)-3a-(1,3-dithian-2-yl)-1,2,3,3a,4,5,5a,6,9a,9b-decahydro-6-methoxy-8,9a-dimethyl-9H-benz[e]indene-4,9-dione