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In this study, a series of novel compounds based on 5-(5-nitrothiophene2--yl)-1,3,4-thiadiazole possessing (het) aryl thio pendant at C-2 position of thiadiazole ring is developed and evaluated as antileishmanial agents using MTT colorimetric assay. 10 New compounds containing aryl and heteroaryl derivatives, started from thiophene-2-carbaldehyde in five steps, were synthesized in good to excellent yields and characterized by 1H-NMR, 13C-NMR, and IR spectroscopy. Through the compounds 6a-j, methylimidazole containing derivative 6e was recognized as the most active compound against L. major promastigotes exhibiting IC50 values of 11.2µg/mL and 7.1µg/mL after 24 and 48 h, respectively. This compound is > 4 fold more effective than Glucantime as a standard drug (IC50 = 50 µg/mL after 24 h and 25 µg/mL after 48 h). [ABSTRACT FROM AUTHOR]

Cu(II)-β-cyclodextrin-catalyzed synthesis of spiro[indoline-3,4′-pyrano[3,2-c]chromene]-3′-carbonitriles through the reaction of isatin derivatives, 4-hydroxycoumarin, and malononitrile in ethanol at room temperature. [ABSTRACT FROM PUBLISHER]

A series of substituted phenylcarbamoyl methyl benzylcarbamodithioates have been synthesized using the multicomponent condition. The reaction proceeded under mild practical condition and afforded the desired products in good yields. [ABSTRACT FROM AUTHOR]

A series of dihydrochromeno[4,3- b]pyrazolo[4,3- e]pyridines has been synthesized using a simple and efficient one-pot, three-component procedure. The products were obtained in good yields in the presence of heterogeneous nanoporous acid catalyst (SBA-Pr-SO3H). [ABSTRACT FROM AUTHOR]

An intramolecular bromonium ion–assisted cyclization with sulfur as an internal nucleophile is described. Starting from benzoyl chlorides, this method provides an easy procedure for the synthesis of dihydrothiazole derivatives in moderate to good yields. [ABSTRACT FROM PUBLISHER]

A series of novel ninhydrin-derived spiro-quinazolinone derivatives in moderate to good yields have been synthesised through a ferric chloride catalysed reaction in 1,2-dichloroethane. [ABSTRACT FROM AUTHOR]

The title compounds are prepared by reaction of ninhydrin with aminobenzamides in moderate to good yields using ferric chloride as catalyst. [ABSTRACT FROM AUTHOR]

The intramolecular bromium ion-assisted cyclization of benzoyl chlorides furnishes dihydrothiazole derivatives by an easy procedure. [ABSTRACT FROM AUTHOR]