Synlett 2008(20): 3231-3233  
DOI: 10.1055/s-0028-1087415
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

DMAP-Accelerated Rhodium(I) Chloride Catalyzed Hydroboration of Vinylarenes

Kohei Endo*, Munenao Hirokami, Kazunari Takeuchi, Takanori Shibata*
Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
Fax: +81(3)52868098; e-Mail: kendo@aoni.waseda.jp; e-Mail: tshibata@waseda.jp ;
Further Information

Publication History

Received 22 August 2008
Publication Date:
26 November 2008 (online)

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Abstract

Regioselective hydroboration of vinylarenes catalyzed by a Rh(I)-DPPB complex proceeded rapidly when DMAP was used as an additive. The catalyst loading could be reduced to 0.4 mol% Rh(I) to furnish the desired products in good to excellent yield with high regioselectivity.