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• W2051437656 abstract "The reaction of pyrroles and indoles with B(C(6)F(5))(3) and BCl(3) produces 1:1 B-N complexes containing highly acidic sp(3) carbons, for example, N-[tris(pentafluorophenyl)borane]-5H-pyrrole (1) and N-[tris(pentafluorophenyl)borane]-3H-indole (2), that are formed by a new formal N-to-C hydrogen shift, the mechanism of which is discussed. With some derivatives, restricted rotation around the B-N bond and/or the B-C bonds was observed by NMR techniques, and some rotational barriers were calculated from experimental data. The acidity of the sp(3) carbons in these complexes is shown by their ability to protonate NEt(3), with formation of pyrrolyl- and indolyl-borate ammonium salts. The driving force for this reaction is given by the restoration of the aromaticity of the heterocycle." @default.
• W2051437656 created "2016-06-24" @default.
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• W2051437656 date "2003-06-18" @default.
• W2051437656 modified "2023-10-16" @default.
• W2051437656 title "Synthesis and Reactivity of (C₆F₅)₃B−<i>N</i>-Heterocycle Complexes. 1. Generation of Highly Acidic sp³Carbons in Pyrroles and Indoles" @default.
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• W2051437656 doi "https://doi.org/10.1021/jo020647x" @default.
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