Pd-catalyzed aryl C-H imidation with arene as the limiting reagent.
Pd-catalyzed aryl C-H imidation with arene as the limiting reagent.
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DOI:
10.1021/ja4064926
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发表时间:
2013-09-11
影响因子:
15
通讯作者:
Ritter T
中科院分区:
文献类型:
--
作者:
Boursalian GB;Ngai MY;Hojczyk KN;Ritter T
An amine-N-oxide ligated palladium complex, in conjunction with a silver co-catalyst, catalyzes imidation of arenes by the reagent N-fluorobenzenesulfonimide. The reaction enables imidation of a variety of arenes at or below room temperature, requires no coordinating directing group on the substrate, and gives synthetically useful yields with only one equivalent of arene. Mechanistic data implicates an unusual mechanism devoid of commonly invoked organometallic intermediates; oxidation of the palladium catalyst occurs as the turnover-limiting step, while C–H bond functionalization occurs subsequently at a high oxidation state of the catalyst.
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