Novel one-step method for the conversion of isothiocyanates to 2-alkyl(aryl)aminothiazoles
作者:Pradip K. Sasmal、A. Chandrasekhar、S. Sridhar、Javed Iqbal
DOI:10.1016/j.tet.2008.09.074
日期:2008.12
2-Aminothiazole derivatives are widely used structural motifs in medicinal chemistry due to their broad application in drug development. Herein we demonstrate a novel one-step method for the synthesis of 2-aminothiazole derivatives from the corresponding isothiocyanates via thiourea formation followed by cycloisomerisation in an intramolecular thia-Michael fashion. This method is very mild, simple
Ghosh, Journal of the Indian Chemical Society, 1931, vol. 8, p. 71,74
作者:Ghosh
DOI:——
日期:——
US7635181B2
申请人:——
公开号:US7635181B2
公开(公告)日:2009-12-22
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.
Simple, Novel Synthesis for 1-Carbamoyl-l<i>H</i>-benzotriazole and Some of Its Analogs
作者:Christopher John Perry、Keith Holding、Elizabeth Tyrrell
DOI:10.1080/00397910802136698
日期:2008.9.12
o-aminophenylurea is key to this process. A preliminary study of the reactivity of 2a has shown that once in solution in tetrahydrofuran (THF), the 1-carbamoyl isomer equilibrates to give a mixture of both 1- and 2-isomers. If the solvent is ethanol or water, equilibration occurs rapidly compared to the ultimate formation of solvolysis products.