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Rh(I)-Catalyzed Asymmetric Hydrosilylation and Hydroboration/Oxidation Reactions Using Berens Ligand

2008; Taylor & Francis; Volume: 38; Issue: 23 Linguagem: Inglês

10.1080/00397910802323106

1532-2432

Carolina S. Marques, Anthony J. Burke,

Catalytic Cross-Coupling Reactions

Abstract Abstract The Berens ligand 2 was used in a number of Rh(I)-catalyzed asymmetric hydrosilylations of acetophenones under standard conditions, affording the corresponding 1-arylalcohols in ees up to 65%. Some novel Rh catalysts were generated in situ from the neutral precatalyst [Rh(µ-Cl)(COD)]2 and screened in the catalytic asymmetric hydroboration/oxidation of styrenes, gave enantioselectivities of up to 62%. Keywords: Catalytic asymmetric synthesischiral diphosphinehydroborationhydrosilylation ACKNOWLEDGMENTS We thank the Fundação para a Ciência e a Tecnologia and Programa Operacional Ciência e Inovação (POCI) for generous financial support of this work (POCI/QUI/55779/2004), including a grant (C.S.M.), which was partly funded by the European Community Fund Fundo Europeu de Desenvolvimento Regional (FEDER).