3,5-di-tertiarybutyl-4-hydroxyphenylmethylene derivatives of 2-substituted thiazolidinones, oxazolidinones, and imidazolidinones as antiinflammatory agents
申请人:WARNER-LAMBERT COMPANY
公开号:EP0449216B1
公开(公告)日:1996-02-07
COSMETIC AND MEDICINAL TOPICAL PREPARATIONS
申请人:BOEHRINGER MANNHEIM GMBH
公开号:EP0695161A1
公开(公告)日:1996-02-07
US5143928A
申请人:——
公开号:US5143928A
公开(公告)日:1992-09-01
Facile one-pot synthesis of 5-aryl/heterylidene-2-(2-hydroxyethyl- and 3-hydroxypropylamino)-thiazol-4-ones via catalytic aminolysis
)- and 2-(3-hydroxypropylamino)-thiazol-4-ones starting from 2-thioxothiazolidin-4-one or 2-methylsulfanylthiazol-4-one was developed. The proposed method involves simultaneous aminolysis of 2-thioxo- or 2-methylsulfanyl groups and Knoevenagel condensation with (hetero)aromatic aldehydes using 2-aminoethanol or 3-aminopropan-1-ol as catalysts. Side-chain prototropic amino–imino tautomerism was observed