Ethyl 5-[2-(2-aminophénylimino)-2-phényléthylidène]-4-(4-chlorophényl)-4,5-dihydro-1,3,4-thiadiazole-2-carboxylate et éthyl 5-[2-[2-(méthylamino)phénylimino]-2-phényléthylidène]-4-(4-nitrophényl)-4,5-dihydro-1,3,4-thiadiazole-2-carboxylate.
Condensation of N-aryl-C-(ethoxycarbonyl)nitrilimines with 4-phenyl-1,2-dihydro-3H-1,5-benzodiazepine-2-thione lead to the title compounds, C(25)H(21)ClN(4)O(2)S, (IIIa), and C(26)H(23)N(5)O(4)S, (IIIb), respectively. Crystals of both compounds were obtained by evaporation of ethanol solutions at room temperature. In the structures of both compounds, a non-bonding interaction is observed between the S atom and the imino N atom. It is established that 1,3-dipolar cycloaddition occurs on the C=S double bond of the 1,5-benzodiazepine-2-thione.
Laboratoire de Chimie des Substances Naturelles et des Hétérocycliques, Faculté des Sciences - Semlalia, Université Cadi Ayyad, Marrakech, Maroc.
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El Hazazi
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Baouid
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Hasnaoui
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Pierrot