Chemoselective Bromodeboronation of Organotrifluoroborates Using Tetrabutylammonium Tribromide: Application in (<i>Z</i>)-Dibromoalkene Syntheses
作者:Min-Liang Yao、Marepally Srinivasa Reddy、Li Yong、Ingrid Walfish、David W. Blevins、George W. Kabalka
DOI:10.1021/ol9027144
日期:2010.2.19
Tetrabutylammonium tribromide (TBATB) has been found to be a unique bromodeboronation reagent for organotrifluoroborates. When compared to previously reported bromodeboronation methods, the mild and metal-free reaction conditions tolerate a wider range of functional groups. High regio- and chemoselectivity are observed in the presence of both unsaturated carbon-carbon bonds and aldehyde functional groups. An efficient synthetic route to (Z)-dibromoalkenes from terminal alkynes has been developed using the TBATB-mediated bromodeboronation as a key step.