On September 15, 2010, Wu, Yusheng; Zou, Dapeng; Li, Jingya; Guo, Ruiyun; Qin, Lijin; Cui, Hongmeng; Cui, Xiuling published a patent.COA of Formula: C12H14F3NO2 The title of the patent was Catalysis system for preparation of N-Boc arylamines. And the patent contained the following:
The catalysis system consists of Pd acetate, phosphine ligand XPhos and Cs carbonate at a mol. ratio 1:3:45-50. The preparation comprises adding Pd acetate, phosphine ligand XPhos, Cs carbonate, tertbutyl amino formate, aryl halide, and anhydrous dioxane at a mol. ratio 0.03:0.09:1.35-1.50:1.2:1:90-95 in a dry reactor, stirring, reacting at 100°C for 1.5-24 h in inert gas (nitrogen) protection, adding water after finishing reaction, extracting with Et acetate, combining organic phases, drying the combined organic phases, concentrating, and purifying. The aryl halide is aryl chloride, aryl bromide, heterogeneous aryl chloride or heterogeneous aryl bromide. The catalysis system can be used for preparation of N-Boc-arylamine compounds The invention has the advantages of mild condition, easy operation, simple post treatment, high yield, less environment pollution, etc.. The experimental process involved the reaction of tert-Butyl (4-(trifluoromethyl)phenyl)carbamate(cas: 141940-37-6).COA of Formula: C12H14F3NO2
The Article related to arylamine butoxycarbonyl preparation aryl halide carbamate coupling catalyst palladium, Heterocyclic Compounds (More Than One Hetero Atom): Pyrazines and Quinoxalines (Including Piperazines) and other aspects.COA of Formula: C12H14F3NO2
Referemce:
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