The Preparation and Characterization of 5-Substituted-4-chloro-1,2,3-dithiazolium Salts and their Conversion into 4-Substituted-3-chloro-1,2,5-thiadiazoles
作者:P. Koutentis
DOI:10.3390/10020346
日期:——
A series of monosubstituted acetonitriles were treated with disulfur dichloride atroom temperature in CH2Cl2 to afford 5-substituted-4-chloro-1,2,3-dithiazolium chlorides 1.Where the 5-substituent was not a good leaving group the chloride salts were converted intothe corresponding perchlorate salts 2 which were sufficiently stable and soluble to provideboth 1H- and 13C-NMR and cyclic voltammetry data. Several of the dithiazolium chlorideswere converted into their corresponding 4-substituted-3-chloro-1,2,5-thiadiazoles 13 ontreatment with aqueous ammonia. Mechanisms for all reactions are proposed.
一系列单取代的乙腈在室温下用二氯化二硫在氯仿中处理,得到了5-取代-4-氯-1,2,3-二噻唑鎓盐 1。当5-取代基不是良好的离去基团时,氯化盐被转化为相应的过氯酸盐 2,这些过氯酸盐具有足够的稳定性和溶解度,以便提供1H和13C-NMR以及循环伏安数据。几个二噻唑鎓盐经水合氨处理后转化为相应的4-取代-3-氯-1,2,5-噻二唑 13。对所有反应的机理进行了探讨。