Syntheses of heterocyclic fused thiazole acetic acids. 2
作者:Stanley C. Bell、Peter H. L. Wei
DOI:10.1021/jm00226a016
日期:1976.4
A number of tricyclic and bicyclic fused thiazole-2-acetic acid derivatives were prepared and the chemistry and biological properties of these compounds are discussed. Many of the esters exhibited antitubercular activity. The bicyclic thiazole-2-acetic acids had antidepressant activity. Interesting antimetastatic activity against Lewis lung tumor in mice was found with several compounds, in particular
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.
Synthesis and Antiinflammatory Activity of Some 1,4-Dihydro-3-methyl-1-(2-thiazolyl)pyrazolo[4,3-<i>c</i>][1,2]benzothiazine 5,5-Dioxides
作者:Pawan K. Sharma、Shanti N. Sawhney
DOI:10.1246/bcsj.66.3843
日期:1993.12
Condensation of 1,4-dihydro-3-methyl-1-thiocarbamoylpyrazolo[4,3-c][1,2]benzothiazine5,5-dioxide with various phenacyl bromides, ethyl 3-aroyl-3-bromopropionates, and ethyl bromopyruvate afforded 1,4-dihydro-3-methyl-1-(2-thiazolyl)pyrazolo[4,3-c][1,2]benzothiazine-5,5 dioxides, which were also prepared by an alternate route in order to confirm their structure, were tested for antiinflammatory activity
2-Substituted-3-hydroxythiazolo(2,3-8)-thiazolium salts and mesoionic
申请人:American Home Products Corporation
公开号:US04327221A1
公开(公告)日:1982-04-27
Novel 2-substituted-3-hydroxythiazolo[2,3-b]thiazolium salts, the mesoionic didehydro derivatives thereof and related compounds and their use as modulators of the immune response are disclosed.