A unified photoredox-catalysis strategy for C(sp(3))-H hydroxylation and amidation using hypervalent iodine.
A unified photoredox-catalysis strategy for C(sp(3))-H hydroxylation and amidation using hypervalent iodine.
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使用高价碘进行 C(sp(3))-H 羟基化和酰胺化的统一光氧化还原催化策略
DOI:
10.1039/c7sc02773g
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发表时间:
2017-10-01
期刊:
影响因子:
8.4
通讯作者:
Chen G
中科院分区:
文献类型:
--
作者:
Li GX;Morales-Rivera CA;Gao F;Wang Y;He G;Liu P;Chen G
We report a unified photoredox-catalysis strategy for both hydroxylation and amidation of tertiary and benzylic C–H bonds. We report a unified photoredox-catalysis strategy for both hydroxylation and amidation of tertiary and benzylic C–H bonds. Use of hydroxyl perfluorobenziodoxole (PFBl–OH) oxidant is critical for efficient tertiary C–H functionalization, likely due to the enhanced electrophilicity of the benziodoxole radical. Benzylic methylene C–H bonds can be hydroxylated or amidated using unmodified hydroxyl benziodoxole oxidant Bl–OH under similar conditions. An ionic mechanism involving nucleophilic trapping of a carbocation intermediate by H2O or CH3CN cosolvent is presented.
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