N-acyldiazenes with isothiocyanates, producing 2-imino-1,3,4-thiadiazoles, is reported. This reaction proceeds well with crude N-acyldiazenes derived from the oxidation of hydrazides by iodine and permits the sequential synthesis of products directly from hydrazides without purification of the less stable N-acyldiazene intermediates. The reaction does not require transition metals and is a simple, scalable operation
报道了AP(NMe 2)3介导的N-酰基
二氮烯与异
硫氰酸酯的环化反应,产生2-亚
氨基-1,3,4-
噻二唑。该反应与衍生自酰
肼被
碘氧化的粗制N-酰基
二氮烯进行得很好,并允许直接从酰
肼连续合成产物,而无需纯化不稳定的N-酰基
二氮烯中间体。该反应不需要过渡
金属,是一种简单,可扩展的操作,具有广泛的底物范围。