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
Asymmetric synthesis of amino-benzothiazol derivatives by additions of 2-lithiated benzothiazoles to (S)-N-t-butylsulfinyl-ketimines
作者:Yanling Dai、Chen Xie、Lingmin Wu、Haibo Mei、Vadim A. Soloshonok、Jianlin Han、Yi Pan
DOI:10.1039/c4ra15405c
日期:——
We reported the asymmetric Mannich reactions between lithium-benzothiazoles and (S)-N-tert-butanesulfinylketimines, which gave unknown type of amino-benzothiazol derivatives of high pharmaceutical potential with up to 96% yields and 99 : 1 diastereoselectivities.