Numerous electrophilic thiocyano oxyfunctionalization reactions of alkenes have been achieved using N-thiocyano-dibenzenesulfonimide, which is a newelectrophilic thiocyanation reagent and could be easily prepared in two steps from dibenzenesulfonimide. This approach provides efficient, simple, and modular methods for the formation of SCN-containing heterocycles such as lactones, tetrahydrofurans,
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
this new reagent to diverse nucleophiles such as benzothiophenes, indoles, oxindoles, aromatic amines, phenols, β-keto carbonyl compounds, and aromatic ketones, a novel electrophilic thiocyanationreaction was achieved with high yields (up to 99%). The potential recycling of Saccharin, the wide scope of substrates, and the mild reaction conditions made this protocol much more practical.