Copper-mediated fluorination of arylboronate esters. Identification of a copper(III) fluoride complex.
Copper-mediated fluorination of arylboronate esters. Identification of a copper(III) fluoride complex.
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DOI:
10.1021/ja310909q
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发表时间:
2013-02-20
影响因子:
15
通讯作者:
Hartwig, John F.
中科院分区:
文献类型:
--
作者:
Fier, Patrick S.;Luo, Jingwei;Hartwig, John F.
A method for the direct conversion of arylboronate esters to aryl fluorides under mild conditions with readily available reagents is reported. Tandem reactions have also been developed for the fluorination of arenes and aryl bromides through aryl-boronate ester intermediates. Mechanistic studies suggest that this fluorination reaction occurs through facile oxidation of Cu(I) to Cu(III) followed by rate-limiting transmetallation of a bound arylboronate to Cu(III). Fast C-F reductive elimination is proposed to occur from an aryl-copper(III)-fluoride complex. Cu(III) intermediates have been generated independently and identified by NMR spectroscopy and ESI-MS.
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