Selective electrochemical <i>para</i>-thiocyanation of aromatic amines under metal-, oxidant- and exogenous-electrolyte-free conditions
作者:Ying Zhang、Huanjie Gao、Jiabao Guo、Hao Zhang、Xiaoquan Yao
DOI:10.1039/d1cc05208j
日期:——
An electrochemical oxidative para-C–H-thiocyanation of aromaticamines has been developed to construct thiocyanato aromatic compounds under metal-, oxidant-, and exogenous-electrolyte-free conditions in an undivided cell. The transformation is compatible with a range of primary, secondary, and tertiaryamines and shows good functional group tolerance. This approach provides an economical and environmentally
Transition-metal-free regioselective thiocyanation of phenols, anilines and heterocycles
作者:Trimbak B. Mete、Tushar M. Khopade、Ramakrishna G. Bhat
DOI:10.1016/j.tetlet.2016.12.043
日期:2017.2
An expedient direct and regioselective thiocyanation of phenols, anilines and heterocycles is described. Transformation is realized via the direct CH functionalization under transition metal free conditions at ambient temperature in excellent yields. Method proved to be monoselective and variety of functional groups tolerated the reaction conditions. The practicality of the protocol is demonstrated
A copper-catalyzedaerobicoxidative reaction between aromatics or heteroaromatics with KSCN is developed by using O2 as the oxidant. The combination of Cu(OTf)2, N,N,N′,N′-tetramethylethylenediamine (TMEDA) and BF3·Et2O provides an efficient catalytic system, affording substituted thiocyanation products and 2-aminobenzothiazoles in excellent yields. The reaction also possesses a good functional group
Visible-light-enabled regioselective aerobic oxidative C(sp2)-H thiocyanation of aromatic compounds by Eosin-Y photocatalyst
作者:Bing Yi、Xiaoyong Wen、Ziqi Yi、Yanjun Xie、Qiang Wang、Jian-Ping Tan
DOI:10.1016/j.tetlet.2020.152628
日期:2020.12
Herein, visible-light-enabled regioselective aerobic oxidative C(sp2)-H thiocyanation of aromaticcompounds has been developed by employing eosin-Y as effective photocatalyst and oxygen as the green terminal oxidant. This process featured green, efficient and operationally simple. Furthermore, the practicality and utility of this protocol was demonstrated by the gram scale synthesis. Mechanistic studies