(2R,4aS,6R,7S,9Z,11aS)-7-(tert-butyldiphenylsilanyloxy)-2-(4-methoxyphenyl)-6-vinyl-4a,6,7,8,11,11a-hexahydro-4H-[1,3]dioxino[5,4-b]oxonine 在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以33%的产率得到(2S,3S,5Z,8S,9R)-2-hydroxymethyl-3-hydroxy-8-(tert-butyldiphenylsilanyloxy)-9-vinyl-2,3,4,7,8,9-hexahydrooxonine