Selective synthesis of multisubstituted olefins utilizing gem- and vic-diborylated vinylsilanes prepared by silylborylation of an alkynylboronate and diborylation of alkynylsilanes.
J Org Chem
; 79(1): 285-95, 2014 Jan 03.
Article
em En
| MEDLINE
| ID: mdl-24320045
ABSTRACT
The synthesis of a series of gem- and vic-diborylated vinylsilanes was accomplished via highly selective transition-metal-catalyzed syn-dimetalation to the alkynylmetal species. This protocol served as a general synthetic method toward regio- and stereodefined multisubstituted olefins. The key steps are the diastereoselective Suzuki-Miyaura cross-coupling reactions of gem- and vic-diborylated vinylsilanes, in which the two boron groups showed discrete reactivities to afford diverse precursors of multisubstituted olefins.
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2014
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Article