共查询到20条相似文献,搜索用时 15 毫秒
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David K. Dean 《ChemInform》2002,33(40):223-223
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《Acta Crystallographica. Section C, Structural Chemistry》2017,73(10):797-802
The search for new tuberculostatics is important considering the occurrence of drug‐resistant strains of Mycobacterium tuberculosis . Three polymorphs of N ′‐(1,3‐dithiolan‐2‐ylidene)‐4‐nitrobenzohydrazide (a potentially tuberculostatic agent), C10H9N3O3S2, denoted (I1), (I2) and (I3), and the monohydrate of this compound, C10H9N3O3S2·H2O, (I4), have been characterized by single‐crystal X‐ray diffraction. The conformations of the molecules in all these structures are very similar. Structures (I1), (I2) and (I3) provide an example of packing polymorphism resulting from different intermolecular interactions. 相似文献
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Salvatore Cabiddu Enzo Cadoni Stefana Melis Alen Ianni Angela M. Bernard Maria G. Cabiddu Stefania De Montis Claudia Fattuoni Sandra Ianelli 《Journal of heterocyclic chemistry》2003,40(6):979-987
The reaction of benzoxathiole‐3‐oxide with lithiumdiisopropylamide in tetrahydrofuran gave an anion, which was reacted with various aryl‐methyl‐ketones to give 2‐(1‐hydroxy‐1‐arylethyl)‐1,3‐benzoxathiol‐3‐oxide derivatives. The reaction was carried out in different temperature conditions: at ‐88 °C the trans addition stereoisomers to the sulfoxide oxygen atom were the main products. 相似文献
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Ahmed El‐Shafei David Hinks Paul D. Boyle Harold S. Freeman 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(8):o569-o571
The title compounds, C18H22Cl2N2O2 and C20H28N2O2, respectively, are isomorphous. The molecules lie at general positions in the unit cell. In each structure, chemically equivalent but crystallographically inequivalent amine N atoms exhibit different degrees of pyramidalization. The structures exhibit weak N—H⋯N hydrogen bonding, which is influenced by the differences in hybridization around the amine N atoms. The torsion angles across the biphenyl linkage for the two compounds are 67.2 (2) and 68.3 (3)°. 相似文献
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