(S)-N-[(4S,4aS,6R,8S,8aR)-6-((S)-2,3-Dihydroxy-propyl)-8-methoxy-7,7-dimethyl-hexahydro-pyrano[3,2-d][1,3]dioxin-4-yl]-2-(3,4-dimethoxy-benzyloxy)-2-((2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylene-tetrahydro-pyran-2-yl)-acetamide 在
咪唑 、 sodium hydride 作用下,
以
四氢呋喃 为溶剂,
生成
(S)-2-(3,4-Dimethoxy-benzyloxy)-2-((2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylene-tetrahydro-pyran-2-yl)-N-((4S,4aS,6R,8S,8aR)-8-methoxy-7,7-dimethyl-6-(S)-1-oxiranylmethyl-hexahydro-pyrano[3,2-d][1,3]dioxin-4-yl)-acetamide