SelectfluorTM: A novel and efficient reagent for the rapid α-thiocyanation of ketones
作者:DEZHEN WU、XIAOJUAN YANG、LIQIANG WU
DOI:10.1007/s12039-012-0270-0
日期:2012.7
The direct α-thiocyanation of ketones with ammonium thiocyanate has been achieved using SelectfluorTM under mild and neutral conditions to produce α-ketothiocyanates, in excellent yields and with high selectivity.
E-mail: wliq1974@sohu.comReceived June 2, 2011, Accepted August 7, 2011Key Words : Thiocyanation, Ketones, Ammonium thiocyanate, Trichloroisocyanuric acid, Synthesisα-Thiocyanation of ketones is one of the most importantreactions in organic synthesis. The thiocyano substitutedcompounds are useful intermediates in the synthesis ofsulfur-containing heterocycles, in which the thiocyanategroup will be
Efficient α-Thiocyanation of Ketones Using Pyridinium Hydrobromide Perbromide
作者:Liqiang Wu、Xiaojuan Yang
DOI:10.1080/10426507.2011.616561
日期:2012.6
Abstract The direct α-thiocyanation of ketones with ammonium thiocyanate has been achieved using pyridinium hydrobromide perbromide under mild and neutral conditions to produce α-ketothiocyanates in excellent yields and with high selectivity. GRAPHICAL ABSTRACT
Efficient, versatile, and metal-free strategies for synthesizing α-thiocyanoketones and thiazolesfrom β-ketosulfoxonium ylides and ammonium thiocyanate have been described. Due to its simplicity, benign reaction conditions, excellent chemoselectivity, and high yield, this method represents a unique approach for divergent synthesis. Finally, the potential value of the developed methods is demonstrated
An efficient and direct approach for the alpha-thiocyanation of ketones with alpha-hydrogens has been developed using ammonium thiocyanate as a thiocyanating agent and oxone as an oxidant in methanol.