77232-48-5Relevant articles and documents
Ruthenium-Catalyzed meta-Selective C?H Mono- and Difluoromethylation of Arenes through ortho-Metalation Strategy
Li, Zhong-Yuan,Li, Liang,Li, Qi-Li,Jing, Kun,Xu, Hui,Wang, Guan-Wu
supporting information, p. 3285 - 3290 (2017/03/16)
The first example for the ruthenium-catalyzed ligand-directed meta-selective C?H mono- and difluoromethylation is developed, affording a variety of new meta-mono- and difluoromethylated 2-phenylpyridines, 2-phenylpyrimidines, and 1-phenylpyrazoles in moderate-to-good yields. This new transformation exhibits broad substrate scope, good functional group tolerance, and high efficiency, and offers a practical approach to synthesize mono- and difluoromethylated arenes. Mechanistic studies indicate that a reaction pathway involving palladium-initiated radical species is involved in the catalytic cycle. The new dual catalytic system consisting of compatible ruthenium(II) and palladium(0) complexes enables the key processes of C?H activation and mono-/difluoromethyl-radical formation to occur and achieves the meta-selective functionalization efficiently. In addition, the present protocol can also be extended to non-fluoromethylation.
Copper-catalyzed, oxidative sp2 C-H cyanation: Facile synthesis of aromatic carbonitriles
Liu, Jin-Qiang,Hao, Bao-Yu,Zou, Hao,Zhang, Wei-Han,Chen, Xin-Zhi
, p. 72 - 93 (2014/07/22)
Cu(OAc)2-catalyzed regioselective oxidative C-H cyanation of two different types of aromatics was described, providing facile access to functionalized heterocycles in good yields. Control experiments suggest the copper chelation-assisted oxidative C-H activation mechanism. ARKAT-USA, Inc.
New transformation of 2-substituted 5-nitropyrimidines by the action of the enamine form of N-methylacetone imine [4]
Yurovskaya,Ivanenkov,Starkova
, p. 1140 - 1141 (2007/10/03)
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