1-(Alkyl/Arylthiocarbamoyl)benzotriazoles as Stable Isothiocyanate Equivalents: Synthesis of Di- and Trisubstituted Thioureas
作者:Alan R. Katritzky、Stephane Ledoux、Rachel M. Witek、Satheesh K. Nair
DOI:10.1021/jo035680d
日期:2004.4.1
1-(Alkyl/arylthiocarbamoyl)benzotriazoles 4a−i were synthesized in yields of 91−99% from bis(benzotriazolyl)methanethione (3). Reagents 4a−g were then used as isothiocyanate equivalents for the efficient synthesis of 10 secondary and 14 tertiary thioureas in high-yielding, convenient processes.
The Preparation of 1,2,3-Trisubstituted Guanidines
作者:Alan R. Katritzky、Niveen M. Khashab、Sergey Bobrov
DOI:10.1002/hlca.200590131
日期:2005.7
diverse amines by use of the new reagent classes (bis-benzotriazol-1-yl-methylene)amines 13a–13f and benzotriazole-1-carboxamidines 17a–17i is described. The preparation is described for a variety of both acyclic and cyclic 1,2,3-trisubstituted guanidines in high yields.
作者:Alan R. Katritzky、Rachel M. Witek、Valerie Rodriguez-Garcia、Prabhu P. Mohapatra、James W. Rogers、Janet Cusido、Ashraf A. A. Abdel-Fattah、Peter J. Steel
DOI:10.1021/jo050670t
日期:2005.9.1
Benzotriazole reagents for thioacylation (RCSBt), thiocarbamoylation (RR'NCSBt), aryl/alkoxythioacylation (ROCSBt), and aryl/alkylthiothioacylation (RSCSBt) are synthesized, and their utility is assessed by syntheses of representative heteroaryl thioureas 3a-g, thioamides 15a-s, thionoesters 16a-h, thiocarbamates 17a-e, dithiocarbamates 18a-d, thiocarbonates 19a-c, and dithiocarbonates 20a-c.
Convenient one-pot synthesis of 5-(substituted amino)-1,2,3,4-thiatriazoles
作者:Alan R. Katritzky、Geeta Meher、Tamari Narindoshvili
DOI:10.1135/cccc2009015
日期:——
5-(Substituted amino)-1,2,3,4-thiatriazoles 15a–15i were conveniently synthesized in 73–97% yields in a one-pot procedure from bis(1H-benzotriazol-1-yl)methanethione and amines.