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Communication | Special issue | Vol 86, No. 1, 2012, pp.139-146
Published online, 30th July, 2012
DOI: 10.3987/COM-12-S(N)30
DESIGN AND SYNTHESIS OF A C2-SYMMETRIC CHIRAl 1,2-BIS(DIPHENYLPHOSPHINO)BENZENE LIGAND VIA RHODIUM-CATALYZED INTRAMOLECULAR [2+2+2] CYCLOADDITION

Fumiya Mori, Keiichi Noguchi, and Ken Tanaka*

*Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo184-8588, Japan

Abstract

The design and synthesis of a C2-symmetric chiral 1,2-bis(diphenylphosphino)benzene ligand via the rhodium-catalyzed intramolecular [2+2+2] cycloaddition followed by reduction are disclosed. This new chiral dppbz-type ligand could be employed for the rhodium-catalyzed asymmetric alkene hydrogenation.