(1R,4S,4aS,8aR)-1,3-Dimethyl-5,8-dioxo-4-trimethylsilanyloxy-1,5,8,8a-tetrahydro-4H-naphthalene-4a-carboxylic acid methyl ester 在
Zn-HOAc 、
锌 作用下,
以98%的产率得到(4aS,5S,8R,8aR)-6,8-Dimethyl-1,4-dioxo-5-trimethylsilanyloxy-1,3,4,5,8,8a-hexahydro-2H-naphthalene-4a-carboxylic acid methyl ester