作者:Richland W. Tester、F.G. West
DOI:10.1016/s0040-4039(98)00856-9
日期:1998.6
diazoketones rearranged to O-bridged medium ring ethers in the presence of catalytic Rh2(OAc)4 or Cu(hfacac)2. This process proceeds via fused bicyclic oxonium ylides which undergo [1,2]-shift reactions. The observation of efficient migration by alkyl substituted carbons lacking any conjugating groups is especially notable. Overall, this chemistry fumishes functionalized medium ring ethers in a few steps from
在催化Rh 2(OAc)4或Cu(hfacac)2的存在下,带有侧重氮酮的环缩醛和缩酮重排为O-桥联的中环醚。该过程通过经历[1,2]转变反应的稠合双环氧鎓叶立德进行。值得注意的是,缺少任何共轭基团的烷基取代的碳可有效迁移。总体而言,该化学过程仅需几步即可从简单的前体中衍生出功能化的中环醚。