Highly efficient and generalized asymmetric synthesis of quaternary stereogenic carbon-containing β-amino indanones/indanoles via Mannich-type additions between 1-indanones and N-tert-butanesulfinylketimines
A Facile Synthesis of Chiral 4-(<i>tert</i>-Butylsulfinylamino)-2-oxophosphonates and Their Conversion into 5,5-Disubstituted 2-Benzylidene-3-oxopyrrolidines
作者:Chengye Yuan、Qianyi Chen
DOI:10.1055/s-2008-1032127
日期:——
The addition of the dianion derived from 2-oxophosphonates to chiral N-( TERT-butylsulfinyl)ketimines or -aldimine under mild reaction conditions afforded 4-( TERT-butylsulfinylamino)-2-oxoalkylphosphonates with good to excellent diastereoselectivity. The latter was then converted into an enantiopure 5,5-disubstituted 2-(dimethoxyphosphoryl)pyrrolidin-3-one via an intramolecular N-H insertion. Subsequent