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• 2011-66-7 2'-chloro-5-nitro-2-aminobenzophenone 
• 7772-99-8 stannous chloride 

Relevant academic research and scientific papers

Cobalt-based nanoparticles prepared from MOF-carbon templates as efficient hydrogenation catalysts

The development of efficient and selective nanostructured catalysts for industrially relevant hydrogenation reactions continues to be an actual goal of chemical research. In particular, the hydrogenation of nitriles and nitroarenes is of importance for the production of primary amines, which constitute essential feedstocks and key intermediates for advanced chemicals, life science molecules and materials. Herein, we report the preparation of graphene shell encapsulated Co3O4- and Co-nanoparticles supported on carbon by the template synthesis of cobalt-terephthalic acid MOF on carbon and subsequent pyrolysis. The resulting nanoparticles create stable and reusable catalysts for selective hydrogenation of functionalized and structurally diverse aromatic, heterocyclic and aliphatic nitriles, and as well as nitro compounds to primary amines (>65 examples). The synthetic and practical utility of this novel non-noble metal-based hydrogenation protocol is demonstrated by upscaling several reactions to multigram-scale and recycling of the catalyst.

Nanoscale Fe2O3-based catalysts for selective hydrogenation of nitroarenes to anilines

Production of anilines - key intermediates for the fine chemical, agrochemical, and pharmaceutical industries - relies on precious metal catalysts that selectively hydrogenate aryl nitro groups in the presence of other easily reducible functionalities. Herein, we report convenient and stable iron oxide (Fe2O3) - based catalysts as a more earth-abundant alternative for this transformation. Pyrolysis of iron-phenanthroline complexes on carbon furnishes a unique structure in which the active Fe2O 3 particles are surrounded by a nitrogen-doped carbon layer. Highly selective hydrogenation of numerous structurally diverse nitroarenes (more than 80 examples) proceeded in good to excellent yield under industrially viable conditions.

Triazolo benzazepines

There are presented benzazepines of the formula STR1 wherein either R1 is hydrogen, lower alkyl, 4-pyridyl or the group --(CH2)n --NR6 R7 and R2 and R3 together are an additional bond or R1 and R2 together are the oxo group and R3 is hydrogen or lower alkyl, R4 is phenyl, o-halophenyl or 2-pyridyl, R5 is halogen or nitro and either R6 is hydrogen or lower alkyl and R7 is hydrogen, lower alkyl, lower alkenyl or lower alkynyl or R6 and R7 together with the nitrogen atom are 4-(lower alkyl)-1-piperazinyl or 4-morpholinyl and n is the number 0 or 1, and their pharmaceutically acceptable acid additions salts. The compounds possess interesting psychotropic properties, i.e., pronounced anxiolytic properties have been established in the case of certain representative members of this class of substance.

Studies on the detection of clonazepam and its main metabolites considering in particular thin-layer chromatography discrimination of nitrazepam and its major metabolic products (author's transl)

The article describes analytical methods concerning screening tests for clonazepam and nitrazepam and the 7-amino derivatives. Further a detailed method is reported for the separation and identificatin of the benzodiazepine pair de. The method described permits a sharp separation and the nitro compounds with TiCl3 on the plate and forming the 7-acetamido derivatives by subsequent separation in the second dimension with ethyl acetate/acetic anhydride. The method described permits a sharp separation and highly sensitive detection by diazotization and coupling with Bratton-Marshall reagent. Amounts as low as 0.02 microng per spot can be detected. Besides preparation methods are reported for 7-aminoclonazepam, 7-acetaminoclonazepam, 2-amino-2'-chloro-5-nitrobenzophenone and 2,5-diamino-2'-chlorobenzophenone. Also spectral data (UV, IR, MS) and a literature review are given.