Visible-light-promoted organic dye catalyzed perfluoroalkylation of hydrazones under mild conditions
作者:Ming-Dong Zhou、Zhen Peng、Lei Li、He Wang
DOI:10.1016/j.tetlet.2019.151124
日期:2019.10
A general and facile visible-light-promoted organic dye catalyzed perfluoroalkylation of hydrazones has been developed using inexpensive and non-toxic Eosin Y as the photoredox catalyst under mild conditions. This reaction protocol exhibits synthetic simplicity, broad scope of substrates, and excellent functional group compatibility. A gram scale synthesis can be also facilitated with a satisfactory
Direct C(sp<sup>2</sup>)–H amination of aryl aldehyde-derived hydrazones via visible light promoted photoredox catalysis
作者:Xin Zhu、Zhi He、Qiu-Yan Li、Xiao-Jun Wang
DOI:10.1039/c7ra01229b
日期:——
An unprecedented visible-light-induced direct C(sp2)–Hamination of aryl aldehyde-derived hydrazones was developed by using N-acyloxyphthalimides as nitrogen-radical precursors. This reaction represents a new way to substituted hydrazones with amination of carbon–nitrogen π bonds. A radical C–H amination mechanism is proposed.
Transition-metal-free electrochemical oxidative C(sp<sup>2</sup>)–H trifluoromethylation of aryl aldehyde hydrazones
作者:Yuan Shi、Kai Wang、Yuxin Ding、Yuanyuan Xie
DOI:10.1039/d2ob01734b
日期:——
A simple protocol of metal-free C–H trifluoromethylation of hydrazones via electrolysis was developed. This environment-friendly transformation showed high efficiency, good tolerance, and scaled-up functionalization, providing the desired products in moderate to good yields. At the same time, a high yield can be obtained for the substrates either bearing an electron-donating group or an electron-withdrawing