A donor–acceptor complex enables the synthesis of <i>E</i>-olefins from alcohols, amines and carboxylic acids
作者:Kun-Quan Chen、Jie Shen、Zhi-Xiang Wang、Xiang-Yu Chen
DOI:10.1039/d1sc01024g
日期:——
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
烯烃是普遍的底物和功能。从醇、胺和羧酸等易得起始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可以在温和条件下实现这种转变。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,并且仍然存在控制区域选择性和立体选择性的挑战。在此,我们提出了一种由电子供体-受体(EDA)配合物实现的根本不同的策略,用于从这些简单且易于获得的起始材料选择性合成烯烃。该转化是通过用碱金属盐对活化底物的 EDA 络合物进行光活化,然后从原位生成的烷基自由基中消除氢原子来进行的。该方法操作简单直接,不含光催化剂和过渡金属,并表现出高区域选择性和立体选择性。