Mechanism of the Enantioselective Oxidation of Racemic Secondary Alcohols Catalyzed by Chiral Mn(III)−Salen Complexes
作者:M. Kevin Brown、Megan M. Blewett、James R. Colombe、E. J. Corey
DOI:10.1021/ja103103d
日期:2010.8.18
clarify the mechanism and origin of the enantioselectivity of the oxidation of racemicsecondaryalcoholscatalyzed by chiral Mn(III)-salen complexes using HOBr, Br(2)/H(2)O/KOAc or PhI(OAc)(2)/H(2)O/KBr as a stoichiometric oxidant. Key points of the proposed pathway include (1) the formation of a Mn(V)-salen dibromide, (2) its subsequent reaction with the alcohol to give an alkoxy-Mn(V) species, and
A cheap industrial method for making 1,2-dibromoindane represented by Formula (I), where the configuration of the bromine atoms on position 1 and position 2 can be trans or cis, or it can be a mixture of trans and cis isomers by reacting indene with hydrogen bromide in the presence of hydrogen peroxide. Water may be used as the solvent and another aprotic organic solvent may be present.