(2R,3S)-3-allyloxy-2-<3'''-<2iv-(3vi-allyloxypropoxymethyl)allyloxy>propoxymethyl>tetrahydropyran 在
bis(tricyclohexylphosphine)benzylidine ruthenium(IV) di 、
盐酸 作用下,
以
二氯甲烷 为溶剂,
生成 (Z)-(4aS,23aR)-16-methylene-2,3,4,4a,6,9,12,13,16,17,20,21,23,23a-tetradecahydro-11H,15H,19H-1,5,10,14,18,22-hexaoxabenzocycloheneicosene 、 (E)-(4aS,23aR)-16-methylene-2,3,4,4a,6,9,12,13,16,17,20,21,23,23a-tetradecahydro-11H,15H,19H-1,5,10,14,18,22-hexaoxabenzocycloheneicosene