A one-pot preparation of cyanamide from dithiocarbamate using molecular iodine
作者:Jayashree Nath、Bhisma K. Patel、Latonglila Jamir、Upasana Bora Sinha、K. V. V. V. Satyanarayana
DOI:10.1039/b914283p
日期:——
method for the synthesis of cyanamides from dithiocarbamate salts via a double desulfurization strategy using molecular iodine is disclosed. Dithiocarbamates, by the action of iodine yield isothiocyanates in situ, which on treatment with aqueous NH3 give thioureas. The thioureas so generated undergo further oxidative desulfurization with I2 giving corresponding cyanamides in good yields. Environmental
Bromineless Bromine as an Efficient Desulfurizing Agent for the Preparation of Cyanamides and 2-Aminothiazoles from Dithiocarbamate Salts
作者:Ramesh Yella、Veerababurao Kavala、Bhisma K. Patel
DOI:10.1080/00397911003642658
日期:2011.2.28
desulfurizing agent in the preparation of organic cyanamides and substituted thiazoles starting from dithiocarbamicacidsalts. In this approach, alkyl/aryl isothiocyantes were first obtained by the desulfurization of dithiocarbamicacidsalts with EDPBT. The in situ–generated isothiocyanates reacts with an aqueous ammonia, forming alkyl or aryl thioureas, which on subsequent oxidative desulfurization
Green and efficient synthesis of thioureas, ureas, primary <i>O</i>-thiocarbamates, and carbamates in deep eutectic solvent/catalyst systems using thiourea and urea
developed for the direct preparation of various primary O-thiocarbamates/carbamates as well as monosubstituted thioureas/ureas by using thiourea/urea as biocompatible thiocarbonyl (carbonyl) sources. This procedure used choline chloride/tin(II) chloride [ChCl][SnCl2]2 with a dual role as a green catalyst and reaction medium to afford the desired products in moderate to excellent yields. Moreover, the DES can
通过使用硫脲/尿素作为生物相容性硫代羰基(羰基)源,开发了一种有效且通用的催化方法,用于直接制备各种伯O-硫代氨基甲酸酯/氨基甲酸酯以及单取代硫脲/脲。该过程使用氯化胆碱/氯化锡 ( II ) [ChCl][SnCl 2 ] 2,具有作为绿色催化剂和反应介质的双重作用,以中等至极好的收率提供所需产物。此外,DES 可以很容易地回收和重复使用七个循环,而其活性没有显着损失。此外,该方法在大规模合成所需产物方面表现出非常好的性能。
Evaluation of 2-thioxo-2,3,5,6,7,8-hexahydropyrimido[4,5-d]pyrimidin-4(1H)-one analogues as GAA activators
作者:Juan J. Marugan、Wei Zheng、Omid Motabar、Noel Southall、Ehud Goldin、Ellen Sidransky、Ronald A. Aungst、Ke Liu、Subir Kumar Sadhukhan、Christopher P. Austin
DOI:10.1016/j.ejmech.2010.01.027
日期:2010.5
Pompe disease is a lysosomal storage disease (LSD) caused by a deficiency in the lysosomal enzyme acid alpha-glucosidase. In several LSDs, enzyme inhibitors have been used as small molecule chaperones to facilitate and increase the translocation of mutant protein from the endoplasmic reticulum to the lysosome. Enzyme activators with chaperone activity would be even more desirable as they would not inhibit the enzyme after translocation and might potentiate the activity of the enzyme that is successfully translocated. Herein we report our initial findings of a new series of acid alpha-glucosidase activators. Published by Elsevier Masson SAS.