Metal-Free Oxidative C(sp<sup>3</sup>)–H Bond Functionalization of Alkanes and Conjugate Addition to Chromones
作者:Jincan Zhao、Hong Fang、Ping Qian、Jianlin Han、Yi Pan
DOI:10.1021/ol502524d
日期:2014.10.17
A metal-free oxidative C(sp3)–H bond functionalization and subsequent conjugate addition reaction using di-tert-butyl peroxide (DTBP) as the oxidant was established, which tolerates a wide range of simple alkane substrates to react with different substituted chromones for direct preparation of 2-alkylchromanones.
A new synthetic approach for 2-alkylchromanones utilizing Fe (III)-catalyzed reductive cross-coupling of olefins with chromones has been developed. The reaction conditions are mild, and various substituted alkenes are applicable to the process. Moreover, control experiments were conducted, and a plausible mechanism is proposed.
已经开发了一种利用 Fe (III) 催化烯烃与色酮的还原交叉偶联的 2-烷基色酮的新合成方法。反应条件温和,可适用多种取代烯烃。此外,还进行了控制实验,并提出了一个合理的机制。
Synthesis of 2-alkyl-chroman-4-ones <i>via</i> cascade alkylation–dechlorination of 3-chlorochromones
作者:Shunyao Li、Lanfei Zhang、Qian He、Xiaofei Zhang、Chunhao Yang
DOI:10.1039/d1ob00463h
日期:——
An efficient and mild synthetic approach for 2-alkyl-substituted chroman-4-ones via zinc mediated cascade decarboxylative β-alkylation and dechlorination of 3-chlorochromones was developed.