A Synthetic Approach, Characterization and Biological Evaluation of Novel
5-(Arylidene)-2-(5-methyl-1,3,4-thiadiazol-2-ylimino)thiazolidin-4-one Derivatives
Solid Supported Synthesis of New 2,4-Dithioxo-6-aryl-3-(1′,3′,4′-thiadiazolo)-1,3,5-triazines Using Microwaves
作者:Mazaahir Kidwai、Akkal Deo Mishra
DOI:10.1002/jccs.200400085
日期:2004.6
A series of novel 2,4-dithioxo-6-aryl-3-(1′,3′,4′-thiadiazolo)-1,3,5-triazines have been synthesized from 1,3,4-thiadiazolo-thioureas and arylaldehydes usingmicrowave irradiations (MWI) over inorganic solidsupports. The yield afforded in microwave reactions was 80% whereas it was 60% in conventional reactions. Solidsupportedsynthesisusingmicrowaves has eliminated the usage of toxic substances
Novel 2-(5-R-1,3,4-thiadiazol-2-yl)aminothiazolin-4-ones 6a-h and 2-imino-3-(5-R-1,3,4-thiadiazol-2-yl)thiazolidin-4-ones 7a-h were prepared by treating N-(5-R-1,3,4-thiadiazol-2-yl)thioureas 4a-h with chloroacetic acid on various solid supports under microwave irradiation. Tautomeric mixtures of compounds 6a-h and 7a-h were obtained in all cases. In alkaline and neutral media, compounds 6a-h were the major products, while ill acid media, 7a-h were the major products.
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