Arenediazonium tetrachlorocuprates(II). Modification of the Meerwein and Sandmeyer reactions
作者:Mykola D. Obushak、Mykhaylo B. Lyakhovych、Mykola I. Ganushchak
DOI:10.1016/s0040-4039(98)02165-0
日期:1998.12
In the copper-catalysed reactions of arenediazonium chlorides with unsaturated compounds arenediazonium tetrachlorocuprates(II) are formed as intermediates. A general method of preparation of these complexed diazonium salts is described. In polar solvents these salts undergo chlorinative dediazoniation to give chloroarenes in high yield. The reaction of an arenediazonium tetrachlorocuprate(II) with
Asymmetric catalysis, part 108 copper catalysts with optically active ligands in the enantioselective Meerwein arylation of activated olefins
作者:Henri Brunner、Christian Blüchel、Michael P. Doyle
DOI:10.1016/s0022-328x(97)00018-1
日期:1997.8
arylation. Replacement of the p-tolyldiazonium salt by the mesityldiazonium salt caused the optical induction in the formation of the corresponding mesityl product rise to 19.5% ee. Thus, though considered to be a radical reaction, the Meerwein arylation of activated olefins can be rendered enantioselective by using copper catalysts with opticallyactive ligands.
Alkyl nitrite-metal halide deamination reactions. 3. Arylation of olefinic compounds in the deamination of arylamines by alkyl nitrites and copper(II) halides. A convenient and effective variation of the Meerwein arylation reaction
作者:Michael P. Doyle、Bernard Siegfried、Robert C. Elliott、Joseph F. Dellaria
DOI:10.1021/jo00434a018
日期:1977.7
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作者:N. D. Obushak、M. B. Lyakhovich、E. E. Bilaya
DOI:10.1023/a:1015394423091
日期:——
Chloroarylation of unsaturated compounds with arenediazonium chlorides in the presence of CuCl2 as catalyst involves intermediate formation of arenediazonium tetrachlorocuprates(II) [ArN2+](2) CuCl42-. A procedure for preparative isolation of these intermediates was developed, and they were shown to be efficient arylating agents. Reactions of [ArN2+](2) CuCl42- with unsaturated compounds gave the corresponding Meerwein products; a mechanism was proposed for these reactions. In polar solvents arenediazonium tetrachlorocuprates(II) are converted into chloroarenes, presumably through a cyclic transition state.