Phenyl isothiocyanate reacted with 2-methylene-1,3-dimethylimidazolidines to give thermally stable, crystalline adducts that possess an inner salt (1,4-dipolar) structure or its tautomeric thioamide structure depending on substituent on the methylene part. Tautomerism between the 1,4-dipolar form and the thioamide form, X-ray diffraction analysis, and 1,4-dipolar cycloaddition with DMAD of these adducts are reported.
异
硫氰酸苯酯与 2-亚甲基-1,3-二甲基
咪唑烷反应生成了热稳定的结晶加合物,根据亚甲基部分取代基的不同,这些加合物具有内盐(1,4-二极)结构或
硫代酰胺同分异构体结构。报告了这些加合物的 1,4-二极形式和
硫代酰胺形式之间的同分异构现象、X 射线衍射分析以及与
DMAD 的 1,4-二极环化反应。