The reactions of substituted benzothiazol-2-ylhydrazones with bromine: a route to s-triazolo[3,4-b][1,3]benzothiazoles
作者:R. N. Butler、P. O'Sullivan、F. L. Scott
DOI:10.1039/p19720001519
日期:——
benzothiazol-2-ylhydrazones with bromine depended on the molar ratio of the reactants and the reaction time. With 1 mol of bromine and short reaction times hydrazone bromonium bromides and perbromides were formed. With 0·5 mol of bromine and longer reaction times the products included hydrobromides, hydrazonyl bromides, and 6 -bromobenzothiazol-2-ylhydrazones. Cyclisations of the hydrazonyl bromides were
的反应产物p取代的苯甲醛苯并噻唑-2- ylhydrazones与溴依赖于反应物的摩尔比和反应时间。用1mol的溴和短的反应时间,形成了溴化hydr溴化物和过溴化物。在具有0·5mol的溴和更长的反应时间的情况下,产物包括氢溴酸盐,肼基溴化物和6-溴苯并噻唑-2-基hydr。对肼基溴化物的环化进行了研究,同时开发了母体与溴的单步环化,作为对s -triazolo [3,4- b ] [1,3]苯并噻唑的有效环化途径。