The Catalytic Asymmetric Mannich-Type Reactions in Aqueous Media
作者:Shū Kobayashi、Tomoaki Hamada、Kei Manabe
DOI:10.1021/ja026094p
日期:2002.5.1
The catalytic, diastereo- and enantioselective Mannich-typereaction of a hydrazono ester with silyl enol ethers in aqueous media has been successfully achieved with ZnF(2), a chiral diamine ligand, and trifluoromethanesulfonic acid.
Enantio- and Diastereoselective, Stereospecific Mannich-Type Reactions in Water
作者:Tomoaki Hamada、Kei Manabe、Shū Kobayashi
DOI:10.1021/ja048607t
日期:2004.6.1
Catalytic asymmetric Mannich-type reactions in water proceeded in high yields and selectivities using a combination of ZnF2 and a chiral diamine that has the methoxy groups on the aromatic rings. In these reactions, either syn- or anti-Mannich adducts were stereospecifically obtained from (E)- or (Z)-silicon enolate, in contrast with most asymmetric Mannich-type reactions.