Metal-free, visible-light induced enantioselective three-component dicarbofunctionalization and oxytrifluoromethylation of enamines via chiral phosphoric acid catalysis.
Metal-free, visible-light induced enantioselective three-component dicarbofunctionalization and oxytrifluoromethylation of enamines via chiral phosphoric acid catalysis.
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通过手性磷酸催化的无金属、可见光诱导的对映选择性三组分二碳官能化和烯胺的氧三氟甲基化
DOI:
10.1039/d1sc06613g
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发表时间:
2022-01-26
期刊:
影响因子:
8.4
通讯作者:
Xu PF
中科院分区:
文献类型:
--
作者:
Liang H;Ji DS;Xu GQ;Luo YC;Zheng H;Xu PF
Using diverse carbon-centered radical precursors and electron-rich (hetero)aromatics and alcohols as nucleophiles, a visible-light driven chiral phosphoric acid (CPA) catalyzed asymmetric intermolecular, three-component radical-initiated dicarbofunctionalization and oxytrifluoromethylation of enamines was developed, which provides a straightforward access to chiral arylmethylamines, aza-hemiacetals and γ-amino acid derivatives with excellent enantioselectivity. As far as we know, this is the first example of constructing a chiral C–O bond using simple alcohols via visible-light photocatalysis. Chiral phosphoric acid played multiple roles in the reaction, including controlling the reaction stereoselectivity and promoting the generation of radical intermediates by activating Togni's reagent. Mechanistic studies also suggested the importance of the N–H bond of the enamine and indole for the reactions.
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影响因子:
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通讯作者:
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