(1S,4aR,5S,6R,8R,9S,10R,10aS)-5,9-Bis-benzyloxy-8-(tert-butyl-dimethyl-silanyloxy)-6-(4-methoxy-benzyloxy)-7,7,10a-trimethyl-4-methylene-dodecahydro-benzocyclooctene-1,10-diol 在
camphor-10-sulfonic acid 、
2,3-二氯-5,6-二氰基-1,4-苯醌 作用下,
以
二氯甲烷 、
水 为溶剂,
生成 (3aS,6aR,7S,8R,10R,11S,11aR,11bS)-7,11-Bis-benzyloxy-10-(tert-butyl-dimethyl-silanyloxy)-2,2,9,9,11b-pentamethyl-6-methylene-dodecahydro-1,3-dioxa-cycloocta[de]naphthalen-8-ol