Sawhney, Indu; Wilson, John R. H., Journal of the Chemical Society. Perkin transactions I, 1990, # 2, p. 329 - 331
作者:Sawhney, Indu、Wilson, John R. H.
DOI:——
日期:——
SAWHNEY, INDU;WILSON, JOHN R. H., J. CHEM. SOC. PERKIN TRANS. PT 1,(1990) N, C. 329-331
作者:SAWHNEY, INDU、WILSON, JOHN R. H.
DOI:——
日期:——
Syntheses of 2-disubstituted-amino-4-arylthiazol-5-ylalkanoic acids.
作者:KENTARO HIRAI、HIROHIKO SUGIMOTO
DOI:10.1248/cpb.25.2292
日期:——
A novel method of synthesizing 2-disubstituted-amino-4-arylthiazol-5-ylalkanoic acids (3) was studied. Dehydration of S-(α-benzoyl-β-ethoxycarbonyl) ethyl 1-piperidinethiocarbonate (5a) in the presence of aqueous perchloric acid-acetic anhydride yielded 4-ethoxycarbonyl-methyl-5-phenyl-2-piperidino-1, 3-oxathiolium perchlorate (1a). Nucleophilic reaction of ammonia with 1a afforded 5-ethoxycarbonylmethyl-4-phenyl-2-piperidinothiazole (2a). Acid-catalyzed hydrolysis of 2a gave 3a as a hydrochloride. The acids (3) were also synthesized by the classical Hantzsch method. These alkanoic acids were evaluated as antiinflammatory agents on carrageenin-induced abscess in rat.