Stereoselective aldol additions of titanium enolates of N-acetyl-4-isopropyl-thiazolidinethione
摘要:
The addition of chlorotitanium enolates of N-acetyl isopropyl thiazolidine-2-thione to aldehydes was investigated. The stereoselectivity of the aldol products was controlled by the number of equivalents of base added. The syn aldol product was obtained preferentially when 2 equiv of Lewis acid and 1 equiv of base were employed. The anti aldol product was obtained preferentially when 1 equiv of Lewis acid and 2 equiv of base were employed for unsaturated aldehydes. Unexpected results were found with hindered aldehydes when 2 equiv of base were employed. (C) 2004 Elsevier Ltd. All rights reserved.
[EN] METHODS OF PREPARATION OF MACROCYCLIC COMPOUNDS<br/>[FR] PROCÉDÉS DE PRÉPARATION DE COMPOSÉS MACROCYCLIQUES
申请人:UNIV FLORIDA
公开号:WO2009105284A1
公开(公告)日:2009-08-27
The instant invention describes methods for producing macrocyclic compounds having antiproliferation activity, and useful in methods of treating disorders such as cancer, tumors and cell proliferation related disorders.
The instant invention describes methods for producing macrocyclic compounds having antiproliferation activity, and useful in methods of treating disorders such as cancer, tumors and cell proliferation related disorders.