38063-81-9Relevant articles and documents
Beckmann rearrangement of ketoximes promoted by cyanuric chloride and dimethyl sulfoxide under a mild condition
Ma, Ruonan,Chen, Xueyuan,Xiao, Zhiyin,Natarajan, Mookan,Lu, Chunxin,Jiang, Xiujuan,Zhong, Wei,Liu, Xiaoming
supporting information, (2021/01/06)
Synthesis of amides via Beckmann rearrangement of ketoximes promoted by cyanuric chloride (TCT)/DMSO under mild conditions has been reported. Conditions of the Beckmann rearrangement, e.g., solvents, the ratios of TCT/DMSO, and the temperature, were investigated using diphenylmethanone oxime as a substrate. The optimized conditions were adopted to afford fourteen amides with yields ranging from 20% to 99%. A plausible mechanism involving an active dimethyl alkoxysulfonium intermediate was proposed according to the mass spectrometry analysis. To our best knowledge, this is the first case of study on Beckmann rearrangement of ketoximes promoted by TCT/DMSO under a mild condition to afford amides efficiently.
Method for preparing aromatic amine compounds from aromatic nitro compounds by catalytic reduction of nano porous gold catalyst
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Paragraph 0024; 0025, (2019/07/04)
The invention discloses a method for preparing aromatic amine compounds from aromatic nitro compounds by catalytic reduction of a nano porous gold catalyst. The nano porous gold catalyst and the aromatic nitro compounds are taken as substrates and subjected to a reaction in methanol with ammonia borane as a hydrogen source at the room temperature, and a product is obtained. The high probability ofagglomeration of conventional granular catalysts is prevented, the nano porous gold catalyst shows excellent structural stability and good recycling efficiency, has excellent universality, especiallyfor the aromatic nitro compounds, and has green and mild catalytic conditions, high yield and good selectivity. The yield of m-nitroaniline from m-nitrotoluene can reach 98%. Moreover, the catalyst can be centrifugally recovered and can be recycled without other treatment, the yield of preparing m-nitroaniline from m-nitrotoluene by catalyzing can still reach 88% after being recycled five times,and thus, waste is effectively avoided. The catalyst shows high activity during the reaction and excellent stability under the reaction conditions.
Copper-Catalyzed Three-Component Domino Cyclization for the Synthesis of 4-Aryl-5-(arythio)-2-(trifluoromethyl)oxazoles
Xiao, Fuhong,Yuan, Shanshan,Huang, Huawen,Zhang, Feng,Deng, Guo-Jun
supporting information, p. 8533 - 8536 (2019/10/17)
A copper-catalyzed oxidative cyclization of oxime, arylthiol, and trifluoroacetic anhydride for the construction of trisubstituted oxazoles has been developed. This transformation combines N-O bond cleavage, C-H functionalization, and intramolecular annulation, providing a practical protocol for the introduction of a trifluoromethyl (-CF3) group at oxazole rings.