Rapid and efficient thiocyanation of phenols, indoles, and anilines in 1,1,1,3,3,3-hexafluoro-2-propanol under ultrasound irradiation
作者:Zhonghao Wang、Liang Wang、Qun Chen、Ming-yang He
DOI:10.1080/00397911.2017.1390139
日期:2018.1.2
ABSTRACT An efficient ultrasound-promoted thiocyanation of phenols, indoles, and anilines in the presence of N-chlorosuccinimide and NH4SCN using 1,1,1,3,3,3-hexafluoro-2-propanol as the solvent has been developed. The major features of the present protocol include the mild reaction conditions, short reaction times, good to excellent yields, and broad substrate scope. Moreover, scale-up synthesis can
Catalytic Thiourea Promoted Electrophilic Thiocyanation of Indoles and Aromatic Amines with NCS/NH<sub>4</sub>SCN
作者:Cancan Wang、Zhonghao Wang、Liang Wang、Qun Chen、Mingyang He
DOI:10.1002/cjoc.201600344
日期:2016.11
A simple and efficient protocol for the electrophilic thiocyanation of indoles and aromaticamines with thiourea/NCS/NH4SCN system has been developed. The major features of the present procedure are the mild conditions, good yields, short reaction times, and the use of inexpensive and readily available organocatalyst. Moreover, N‐chlorosuccinimide (NCS) was found to be indispensable, and thiourea could
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
Electrochemical and direct C–H methylthiolation of electron-rich aromatics
作者:Yaxing Wu、Hongliang Ding、Ming Zhao、Zhong-Hai Ni、Jing-Pei Cao
DOI:10.1039/d0gc00591f
日期:——
The electrochemical-induced C–H methylthiolation of electron-rich aromatics has been accomplished via a three component cross-coupling strategy. Potassium thiocyanate (KSCN) as both the supporting electrolyte and sulfur source and methanol as the methylation reagent are used. This protocol is versatile for various (hetero)aromaticcompounds such as aniline, anisole and indole. The reaction proceeds
Graphene oxide: a promising carbocatalyst for the regioselective thiocyanation of aromatic amines, phenols, anisols and enolizable ketones by hydrogen peroxide/KSCN in water
作者:Dariush Khalili
DOI:10.1039/c5nj02314a
日期:——
thiocyanation of a variety of arenes including aromatic amines, phenols, anisols and carbonyl compounds that possessing α-hydrogen in the presence of hydrogen peroxide and KSCN in water as a green media. This procedure is chemoselective, avoids the use of precious metals and toxic solvents and has a broad substrate scope. Easy removal from the reaction mixture and recyclability with no loss of activity are