Asymmetric Mannich-type reactions with a chiral acetate: effect of Lewis acid on activation of aldimine
作者:Susumu Saito、Keiko Hatanaka、Hisashi Yamamoto
DOI:10.1016/s0040-4020(00)01042-5
日期:2001.1
addition. This scope was expanded to the asymmetric process using the chiral acetate, which has optically pure 2,6-bis(2-isopropylphenyl)-3,5-dimethylphenol as a chiralauxiliary with axial chirality. A Lewis acid additive is likely to have a complementary role in the pronounced activation of imine functionalities in the Mannich-type addition of the bulky chiral acetate.
Asymmetric Mannich-Type Reactions of Aldimines with a Chiral Acetate
作者:Susumu Saito、Keiko Hatanaka、Hisashi Yamamoto
DOI:10.1021/ol000099e
日期:2000.6.1
strongly on the use of o-alkoxy (or o-fluoro) aniline-derived aldimines which have been found to have a potential effect on the enolate addition. This scope was expanded to the asymmetric process using the chiral acetate. A Lewis acid additive has a complementary role in the pronounced activation of imine functionalities.