A donor-acceptor complex enables the synthesis of E-olefins from alcohols, amines and carboxylic acids.

A donor-acceptor complex enables the synthesis of E-olefins from alcohols, amines and carboxylic acids.
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供体-受体复合物能够从醇、胺和羧酸合成E-烯烃

DOI:
10.1039/d1sc01024g
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发表时间:
2021-04-05
期刊:
影响因子:
8.4
通讯作者:
Chen XY
Chen XY
中科院分区:
化学1区
文献类型:
--
作者:
Chen KQ;Shen J;Wang ZX;Chen XY

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烯烃是普遍存在的底物和官能团。从醇、胺和羧酸等容易获得的原料合成烯烃,对于解决有机合成中的可持续性问题具有重要意义。据报道,金属光氧化还原催化的去官能化反应可以在温和的条件下实现这种转化。然而,所有这些有价值的策略都需要过渡金属催化剂、配体或昂贵的光催化剂,同时仍然存在控制区域和立体选择性的挑战。在这里,我们提出了一种由电子给体-受体(EDA)络合物实现的根本不同的策略,用于从这些简单且容易获得的起始材料选择性地合成烯烃。这些转化是通过活化底物与碱性盐光活化EDA络合物,然后从原位生成的烷基自由基中消除氢原子来实现的。该方法操作简单,不含光催化剂和过渡金属,具有较高的区域选择性和立体选择性。提出了一种以易得的醇、胺和羧酸为起始原料的可见光诱导去功能化合成烯烃的方法。
Olefins are prevalent substrates and functionalities. The synthesis of olefins from readily available starting materials such as alcohols, amines and carboxylic acids is of great significance to address the sustainability concerns in organic synthesis. Metallaphotoredox-catalyzed defunctionalizations were reported to achieve such transformations under mild conditions. However, all these valuable strategies require a transition metal catalyst, a ligand or an expensive photocatalyst, with the challenges of controlling the region- and stereoselectivities remaining. Herein, we present a fundamentally distinct strategy enabled by electron donor–acceptor (EDA) complexes, for the selective synthesis of olefins from these simple and easily available starting materials. The conversions took place via photoactivation of the EDA complexes of the activated substrates with alkali salts, followed by hydrogen atom elimination from in situ generated alkyl radicals. This method is operationally simple and straightforward and free of photocatalysts and transition-metals, and shows high regio- and stereoselectivities. A visible-light-induced defunctionalization strategy for the synthesis of olefins by using easily available alcohols, amines and carboxylic acids as starting materials is demonstrated.
烷基和芳基碘化物的无金属自由基化。
DOI: 10.1002/anie.201810782
发表时间: 2018-12-17
期刊: Angewandte Chemie (International ed. in English)
影响因子: --
作者:
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通讯作者: Studer A
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发表时间: 2015-04-22
影响因子: 15
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通讯作者: Makris, Thomas M.
DOI: 10.1126/science.aav1610
发表时间: 2019-01-25
期刊: SCIENCE
影响因子: 56.9
作者:
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DOI: 10.1016/0040-4020(68)88124-4
发表时间: 1968-01-01
期刊: TETRAHEDRON
影响因子: 2.1
作者:
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通讯作者: KOCHI, JK
DOI: 10.1039/b316613a
发表时间: 2004-03-21
影响因子: 4.9
作者:
Goossen, LJ;Rodríguez, N
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