✍ Scribed by Ehab Abdel-latif; Samir Bondock
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The behavior of ethyl 2‐phenylthiocarb‐ amoyl acetate 1 toward a variety of several α‐halo‐ carbonyl compounds was investigated. Thus, reaction of 1 with α‐bromoketones, hydrazonoyl bromides, and 2‐chloro‐N‐arylacetamides afforded the corresponding dihydrothiazole, 1,3,4‐thiadiazole, and thiophene derivatives, respectively. The synthesis of thiazolidin‐4‐one 11, thiazolidin‐5‐one 12, and some azo derivatives of thiazolidin‐5‐one were described. 5‐Arylazothiazoles 17 and 19 were synthesized by condensation of hydrazonoyl bromides 3 with different thiourea derivatives. © 2006 Wiley Periodicals, Inc. Heteroatom Chem 17:299–305, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20206
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Thiazolylcyanothioacetanilides react with ␣-haloketones and haloesters to give the corresponding thiophene or thiazole derivatives according to the reaction conditions. Pyrazolo [1,5-a]pyrimidines and pyrazolo [5,1-c]triazines were synthesized by reaction of 3-amino-4-(4Ј-arylthiazol-2Ј-yl)-5-phenyl