{1-[1-((3R,4S,5R)-4-Benzyloxy-5-benzyloxymethyl-2-phenylsulfanyl-tetrahydro-furan-3-yloxy)-meth-(Z)-ylidene]-2,2-dimethyl-propoxy}-tert-butyl-dimethyl-silane 在
mercuric triflate 、
N,N-二甲基苯胺 作用下,
以
乙腈 为溶剂,
生成 (4aR,6R,7S,7aR)-3-tert-butyl-7-phenylmethoxy-6-(phenylmethoxymethyl)-4a,6,7,7a-tetrahydrofuro[2,3-b][1,4]dioxine