Formation of new heterocycles by intramolecular cyclization reactions of alkynethiolates with nitrogen nucleophiles
作者:Ahmed Hameurlaine、Michael A Abramov、Wim Dehaen
DOI:10.1016/s0040-4039(01)02326-7
日期:2002.2
1,2,3-Thiadiazole-4-carbohydrazides undergo base-catalyzed ring cleavage with liberation of nitrogen and recyclization to 5-thiopyrazolones, 6-thiomethylidene-1,3,4-oxadiazin-5-ones or 5-thio-7H-pyrazolo[5,1-b][1,3]thiazine-2,7-diones.
1,2,3-噻二唑-4-碳酰肼经历碱催化的环裂解,释放出氮,然后循环生成5-硫代吡唑酮,6-硫代亚甲基-1,3,4-恶二嗪-5-酮或5-硫代-7 H -吡唑并[5,1- b ] [1,3]噻嗪-2,7-二酮。