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- W2046933565 abstract "A comparative study on the reactivity and selectivity of arylcopper species in reactions with boron halides was performed. Mesitylcopper reacts with BX3 (X=Cl, Br) in toluene at low temperature under highly selective formation of the monosubstituted boranes MesBX2. The dimesitylboranes Mes2BX are gradually formed with a twofold excess of the organocopper reagent at elevated temperature. In contrast, pentafluorophenylcopper shows a tendency for formation of B(C6F5)3 in reactions with BX3 irrespective of the stoichiometry used, suggesting a strong impact of electronic factors on the selectivity of the aryl transfer reaction. New procedures for the synthesis of the pentafluorophenylboron halides C6F5BX2 (X=Cl: 57%; X=Br: 62%) and of tris(pentafluorophenyl)borane (80%) and related mixed-substituted triarylboranes from the base-free isolable pentafluorophenylcopper precursor have been developed." @default.
- W2046933565 created "2016-06-24" @default.
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- W2046933565 date "2003-09-01" @default.
- W2046933565 modified "2023-10-09" @default.
- W2046933565 title "A comparative study of base-free arylcopper reagents for the transfer of aryl groups to boron halides" @default.
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- W2046933565 doi "https://doi.org/10.1016/s0022-328x(03)00588-6" @default.
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