Asymmetric transfer hydrogenation of ketones in aqueous solution catalyzed by rhodium(III) complexes with C2-symmetric fluorene-ligands containing chiral (1R,2R)-cyclohexane-1,2-diamine

Asymmetric transfer hydrogenation of ketones in aqueous solution catalyzed by rhodium(III) complexes with C2-symmetric fluorene-ligands containing chiral (1R,2R)-cyclohexane-1,2-diamine

Two C2-symmetric bis(sulfonamide) ligands containing fluorene-chiral (1R,2R)-cyclohexane-1,2-diamine were complexed to RhIII(Cp*) and used as catalyst to reduce aromatic ketones. The corresponding chiral secondary alcohols were obtained in 87-100% ee and 85-99% yield, under asymmetric transfer hydrogenation (ATH) conditions using aqueous sodium formate as the hydride source. With acetophenone, 94% ee and 86-97% yield was achieved with substrate/catalyst (S/C) ratio of 10,000.

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Bibliographic Details
Main Authors: Montalvo-González,Rubén, Chávez,Daniel, Aguirre,Gerardo, Parra-Hake,Miguel, Somanathan,Ratnasamy
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Química 2010
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000300005
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