Visible light-promoted metal-free C-H activation: diarylketone-catalyzed selective benzylic mono- and difluorination.
Visible light-promoted metal-free C-H activation: diarylketone-catalyzed selective benzylic mono- and difluorination.
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DOI:
10.1021/ja410815u
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发表时间:
2013-11-20
影响因子:
15
通讯作者:
Chen C
中科院分区:
文献类型:
--
作者:
Xia JB;Zhu C;Chen C
We report herein an operationally simple method for the direct conversion of benzylic C–H groups to C–F. We show that visible light can activate diarylketones to abstract a benzylic hydrogen atom selectively. Adding a fluorine radical donor yields the benzylic fluoride and regenerates the catalyst. The selective formation of mono- and difluorination products can be achieved by catalyst-control. 9-Fluorenone catalyzes benzylic C–H monofluorination while xanthone catalyzes benzylic C–H difluorination. The scope and efficiency of this new C–H fluorination method are significantly better than those of the existing methods. This is also the first report of selective C–H gem-difluorination.
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影响因子:
5.2
作者:
Beaulieu F;Beauregard LP;Courchesne G;Couturier M;LaFlamme F;L'Heureux A
通讯作者:
L'Heureux A
影响因子:
1.9
作者:
FEIRING, AE
通讯作者:
FEIRING, AE
影响因子:
16.6
作者:
Bloom, Steven;Pitts, Cody Ross;Lectka, Thomas
通讯作者:
Lectka, Thomas
DOI:
10.1039/b204776b
发表时间:
2002-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1
影响因子:
--
作者:
Chambers, RD;Kenwright, AM;Moilliet, JS
通讯作者:
Moilliet, JS
影响因子:
15
作者:
Fier, Patrick S.;Hartwig, John F.
通讯作者:
Hartwig, John F.