Catalytic Enantioselective Pinacol and Meinwald Rearrangements for the Construction of Quaternary Stereocenters
作者:Hua Wu、Qian Wang、Jieping Zhu
DOI:10.1021/jacs.9b04551
日期:2019.7.24
enantioselective pinacolrearrangement is ex-tremely challenging due to the likelihood involvement of the carbeni-um intermediate that renders the stereochemical communication between catalyst and substrate difficult to achieve. Herein, we report chiral N-triflyl phosphoramide-catalyzed enantioselective pinacolrearrangement of 1,2-tertiary diols and mechanistically related Meinwald rearrangement of tetrasubstituted
An Alternative Reaction Outcome in the Gold-Catalyzed Rearrangement of 1-Alkynyloxiranes
作者:María J. González、Jesús González、Rubén Vicente
DOI:10.1002/ejoc.201201191
日期:2012.11
The gold(III)-catalyzed rearrangement of tetrasubstituted 1-alkynyloxiranes is described. This transformation led to a different reactionoutcome with respect to related substrates previously studied. Thus, tertiary α-alkynylketones or alkynols can be selectively obtained. Moreover, gold(III) proved capable to catalyze the rearrangement of simple epoxides. These results indicate that gold(III) complexes
Zinc-catalyzed Meinwald rearrangement of tetrasubstituted 1-alkynyloxiranes to tertiary α-alkynylketones
作者:María J. González、Jesús González、Carmela Pérez-Calleja、Luis A. López、Rubén Vicente
DOI:10.1039/c2cy20810e
日期:——
Easy access to tertiary α-alkynylketones via a Meinwald-type rearrangement of 1-alkynyloxiranes is reported. This transformation is selectively accomplished with an economical zinc catalyst.