Optically active pentacyclic binuclear diorganotin compounds |
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Authors: | Ví ctor M. Jimé nez-Pé rez,Armando Ariza-Castolo,Rosalinda Contreras |
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Affiliation: | a Departamento de Química, Cinvestav, A.P. 14-740, C.P. 07000, México, D.F., Mexico b Departament Chemie, Ludwig-Maximillians Universität, Butenandt-Strasse 5-13 (Haus D), D-81377 Munich, Germany |
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Abstract: | Three optically active binuclear diorganotin compounds (2-4) were prepared from an optically active oxalamide: (1S,2R)-(−)-[N-(2-hydroxy-1-methyl-2-phenyl-ethyl)-N′-(2-hydroxy-phenyl)-oxalamide (1). The new compounds [1-(2′,2′-diorganyl-1′-oxa-3′-aza-2′-stanna-indan-3′-yl)-2-(2″,2″-diorganyl-4″-methyl-5″-phenyl[1,3,2]-oxazastannolidin-3″-yl)-ethane-1,2-dione {organyl = methyl (2), n-butyl (3) or phenyl (4)} were characterized by IR, elemental analysis and mass spectrometry. Compounds 3 and 4 were submitted to a detailed NMR study in order to assign their resonances (1H and 13C) and specially the two different 119Sn signals for each compound. The X-ray diffraction analysis of compound 4 showed a planar pentacyclic framework with two penta-coordinated tin atoms with a distorted tbp geometry and 12 intramolecular hydrogen bonds. |
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Keywords: | Optically active tin compounds Binuclear tin heterocycles Tin heteropentacycles |
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