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Simple and convenient procedures have been developed for the synthesis of 2-aryl-4-(4-hydroxy-6-methyl-2-pyrone-3-yl)-2,3-dihydro-l,5-benzothiazepines (3a-e) by the condensation reaction between 2-aminothiophenol (1) and 3-cinnamoyl-4-hydroxy-6-methyl-2-pyrones(2a-e) with MCM-41(H) Zeolite in ethanol. Introduction :

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Multi-membered N-heterocycles R 0690Microwave-Induced Solvent-Free Synthesis of Substituted 1,5-Benzodiazepine Derivatives.-An efficient synthesis of the hitherto unknown title compounds (III) by a solventless microwave procedure in the presence of catalytic amounts MCM-41 zeolite is described. -(SUCHETA, K.; RAO*, B. V.; Indian J. Chem., Sect. B: Org.