Organic co-solvents in aqueous DNA-based asymmetric catalysis
作者:Rik P. Megens、Gerard Roelfes
DOI:10.1039/b921385f
日期:——
Water-miscible organic co-solvents can be used in DNA-based catalytic asymmetric reactions at appreciable concentration without a negative effect on enantioselectivity. While the rate of the copper(II) Diels–Alder reaction is affected negatively by the presence of organic co-solvents, the copper(II) catalyzed Michael addition and Friedel–Crafts alkylation reaction are significantly faster. Additionally
On the Role of DNA in DNA-based Catalytic Enantioselective Conjugate Addition Reactions
作者:Ewold W. Dijk、Arnold J. Boersma、Ben L. Feringa、Gerard Roelfes
DOI:10.1039/c005048b
日期:——
A kinetic study of DNA-based catalyticenantioselective Friedel–Crafts alkylation and Michael additionreactions showed that DNA affects the rate of these reactions significantly. Whereas in the presence of DNA, a large acceleration was found for the Friedel–Crafts alkylation and a modest acceleration in the Michael addition of dimethyl malonate, a deceleration was observed when using nitromethane