通过碳-碳键的选择性裂解使分子功能化是合成化学中一种很有吸引力的方法。尽管最近在过渡金属催化和自由基化学方面取得了进展,但碳氢化合物原料中惰性 C sp3 -C sp3键的选择性裂解仍然具有挑战性。文献中报道的例子通常涉及含有氧化还原官能团或高度应变分子的底物。在本文中,我们提出了一个用于 C sp3 –C sp3的切割和功能化的简单方案使用光氧化还原催化在烷基苯中键合。我们的方法采用两种不同的断键途径。对于具有叔苄基取代基的底物,普遍采用碳阳离子耦合电子转移机制。对于具有主要或次要苄基取代基的底物,三重单电子氧化级联是适用的。我们的策略提供了一种实用的方法,可以在没有任何杂原子的情况下切割分子中的惰性 C sp3 -C sp3键,从而产生一级、二级、三级和苄基自由基物种。
N-heterocyclic carbene catalysis promoted the unprecedented decarboxylative coupling of aryl aldehydes and tertiary or secondary alkyl carboxylic acid-derived redox-active esters to produce aryl alkyl ketones. The mild and transition-metal-free reaction conditions are attractive features of this method. The power of this protocol was demonstrated by the functionalization of pharmaceutical drugs and natural
POLY HETEROCYCLIC CONJUGATES AND THEIR PHARMACEUTICAL USES
申请人:National Health Research Institutes
公开号:US20210403483A1
公开(公告)日:2021-12-30
Compounds of Formula (I) shown below and a pharmaceutical composition containing one of the compounds:
Each of the variables is defined herein. Also disclosed is a method of treating a condition associated with uncontrolled cell growth with a compound of Formula (I).