-thiocyanatovinyl aldehydes with N-amino heterocycles leads to formation of α, β - unsaturated hydrazonium salts dependent on the functional surroundings. The latter can undergo further intramolecular cyclocondensation giving rise to N,N′-linked isothiazolium salts as the final product. The isolated hydrazonium salts, not undergoing ring formation, have s-trans conformation of the azadiene system
β-
硫氰基
乙烯基醛与 N-
氨基杂环的相互作用导致 α, β-不饱和腙盐的形成,这取决于功能环境。后者可以进行进一步的分子内环缩合反应,产生 N,N'-连接的
异噻唑鎓盐作为最终产物。未形成环的分离的腙盐具有氮杂二烯系统的 s-反式构象