the cis bicyclic αβ-unsaturated ketone (5) in diethyl Lg-(+)-tartrate afforded a 1 : 7 mixture of the cis(5) and the trans ketone (6) enriched in the (–)-enantiomer; Wolff–Kishner reduction of (6) yielded (–)-D2-bicyclo[8.8.0]octadec-1(10)-ene (7)(optical purity 0·5–1·0%) with the (R)- configuration.
所述的紫外线照射顺式双环αβ不饱和酮(5在
二乙基)大号克- (+) -
酒石酸盐,得到一个1:7混合物的顺式(5)和反式的酮(6中富集)( - ) -对映体; 用Wolff-Kishner还原(6)得到(-)- D 2-双环[8.8.0] octadec-1(10)-烯(7)(光学纯度0·5-1–0%),(R) - 配置。