- Palladium-Catalyzed Para-Selective Difluoromethylation of Arene Esters
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Highly efficient, palladium-catalyzed, para-selective difluoromethylation of arene esters has been developed using [1,1′-biphenyl]-2-dicyclohexylphosphine as the effective ligand. A wide variety of arene esters bearing various functional groups were all compatible with the reaction conditions, leading to para-difluoromethylated products in moderate to good yields. Moreover, benzoylamide and benzenesulfonamide were also well-tolerated, suggesting that this novel catalyst system has broad applications to a variety of substrates.
- Tu, Guangliang,Wang, Dongjie,Yuan, Chunchen,Zhang, Jingyu,Zhao, Yingsheng
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- REACTION OF TETRAKIS(POLYFLUOROALKOXY)TELLURANES WITH CARBOXYLIC AND DICARBOXYLIC ACID ANHYDRIDES
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Depending on the reaction conditions, the reaction of tetrakis(polyfluoroalkoxy)telluranes with acetic, trifluoroacetic, benzoic, and phthalic anhydrides gives acyloxy(polyfluoroalkoxy)telluranes or esters of acyloxytellurous acid, which are a new type of derivatives of tetra- and hexacoordinated tellurium.Polyfluorinated esters are also obtained in the reaction of acid anhydrides with (polyfluoroalkoxy)telluranes.
- Stukalo, E. A.,Yur'eva, E. M.,Markovskii, L. N.
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p. 675 - 681
(2007/10/02)
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