Silicon-Directed Rhenium-Catalyzed Allylic Carbaminations and Oxidative Fragmentations of γ-Silyl Allylic Alcohols
作者:Sanjay W. Chavhan、Matthew J. Cook
DOI:10.1002/chem.201400104
日期:2014.4.22
A highly regioselective allylic substitution of β‐silyl allylic alcohols has been achieved that provides the branched isomer as a single product. This high level of regiocontrol is achieved through the use of a vinyl silane group that can perform a Hiyama coupling providing 1,3‐disubstituted allylic amines. An unusual oxidative fragmentation product was also observed at elevated temperature that appears
Silicon-Directed Rhenium-Catalyzed Allylic Substitutions with <i>N</i>-Hydroxycarbamates, <i>N</i>-Hydroxysulfonamides, and Hydroxamic Acids
作者:Sanjay W. Chavhan、Catherine A. McAdam、Matthew J. Cook
DOI:10.1021/jo501992p
日期:2014.11.21
A rhenium-catalyzed N-selective allylic amination reaction of N-hydroxycarbamates has been developed. This reaction occurs with excellent N/O selectivity and with complete carbon selectivity on the allylic system. The reaction is tolerant of many functional groups and also proceeds with N-hydroxysulfonamides and hydroxamic acids.