Photocatalytic Radical Aroylation of Unactivated Alkenes: Pathway to β-Functionalized 1,4-, 1,6-, and 1,7-Diketones.

Photocatalytic Radical Aroylation of Unactivated Alkenes: Pathway to β-Functionalized 1,4-, 1,6-, and 1,7-Diketones.
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未激活的烷烃的光催化自由基:通往β官能化1,4-,1,6-和1,7-二酮的途径。

DOI:
10.1021/acscatal.9b03570
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发表时间:
2019-11-01
期刊:
影响因子:
12.9
通讯作者:
Ngai MY
Ngai MY
中科院分区:
化学1区
文献类型:
--
作者:
Sarkar S;Banerjee A;Yao W;Patterson EV;Ngai MY

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本文报道了室温下由芳酰氯和未活化的烯烃合成β-官能化不对称1,4-,1-6和1,7-二酮的光催化方法。温和的反应条件不仅容许宽范围的官能团和结构部分,而且能够使各种远端基团迁移,包括(杂)芳烃、腈、醛、肟衍生物和烯烃。手性转移的效率,控制远端基团迁移的因素,以及从二酮合成碳环和杂环也被描述。机理研究表明,涉及未活化的烯烃的光催化自由基芳酰化反应途径,然后由远端基团迁移,氧化和去质子化,以提供所需的二酮。
We report the development of a photocatalytic strategy for the synthesis of β-functionalized unsymmetrical 1,4-, 1–6 and 1,7-diketones from aroyl chlorides and unactivated alkenes at room temperature. The mild reaction conditions not only tolerate a wide range of functional groups and structural moieties, but also enable migration of a variety of distal groups including (hetero)arenes, nitrile, aldehyde, oxime-derivative, and alkene. The efficiency of chirality transfer, factors that control the distal-group migration, and synthesis of carbo- and heterocycles from the diketones are also described. Mechanistic studies suggest a reaction pathway involving a photocatalytic radical aroylation of unactivated alkenes followed by a distal-group migration, oxidation, and deprotonation to afford the desired diketones.
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发表时间: 2015-08-19
影响因子: 15
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