The construction of C(sp<sup>3</sup>)–O bond via copper porphyrin catalyzed cross-dehydrogenative coupling reaction: Substituent and electronic effect of the catalysts
作者:Feng-Hua Wang、Zheng-Yan Liu、Shuang Yang、Lei Shi、Dong-Zi Lin、Hai-Yang Liu、Gao-Qing Yuan
DOI:10.1080/00397911.2021.1919900
日期:——
effect of copper porphyrin catalysts on the cross-dehydrogenative coupling (CDC) reaction between the hydroxyl group of phenol substrates and C(sp3)-H bond have been investigated. Results showed that copper porphyrin bearing electron-withdrawing, bulky steric hindrance or heteroatom of pyridyl groups could increase the catalytic activity in the reaction. 5,10,15,20-(tetrakis(4-pyridyl)porphyrin)copper
摘要 已经研究了铜卟啉催化剂对苯酚底物的羟基与 C(sp 3 )-H 键之间的交叉脱氢偶联 (CDC) 反应的推挽电子和空间效应。结果表明,带有吸电子、大体积位阻或吡啶基杂原子的铜卟啉可以提高反应的催化活性。5,10,15,20-(四(4-吡啶基)卟啉)铜(CuTPyP)在所有测试的催化剂中被发现是最好的。带有各种官能团的苯酚底物提供了中等至极好的产率(99%)。值得注意的是,与其他测试的铜卟啉相比,CuTPyP 不仅表现出显着更高的活性,而且可以将反应时间从 12 小时缩短到 6 小时。