(S)-(3,4-Dimethoxy-benzyloxy)-((2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylene-tetrahydro-pyran-2-yl)-acetic acid methyl ester 在
六甲基磷酰三胺 、
4-二甲氨基吡啶 、
lithium thiopropiolate 作用下,
以
二氯甲烷 为溶剂,
生成 Acetic acid (S)-3-{(4R,4aS,6R,8S,8aR)-4-[(S)-2-(3,4-dimethoxy-benzyloxy)-2-((2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylene-tetrahydro-pyran-2-yl)-acetylamino]-8-methoxy-7,7-dimethyl-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yl}-2-methoxy-propyl ester