Indene-Based Thiazolidinethione Chiral Auxiliary for Propionate and Acetate Aldol Additions
作者:Antonio Osorio-Lozada、Horacio F. Olivo
DOI:10.1021/ol702980p
日期:2008.2.1
An indene-based thiazolidinethione chiral auxiliary was prepared in two steps from trans-1-amino-2-indanol. Chlorotitanium enolates of this chiral auxiliary delivered excellent diastereoselectivities in propionate and acetate aldol additions. The chiral auxiliary was easily removed to deliver several valuable functionalities.
US8309738B2
申请人:——
公开号:US8309738B2
公开(公告)日:2012-11-13
Methods for the Preparation of Thiazolidinethione Indene-Based Chiral Auxiliaries
申请人:Olivo Horacio F.
公开号:US20100179330A1
公开(公告)日:2010-07-15
Methods for the preparation of indene-based thiazolidinethiones are provided comprising contacting 1-amino-2,3-dihydro-1H-inden-2-ol, or a substituted derivative thereof, with an acid under suitable reaction conditions to provide a first intermediate; and contacting the first intermediate with an alkali xanthate in the presence of an alkali hydroxide under suitable reaction conditions to provide a compound of formula (III),
wherein R
1
-R
8
are defined herein.