forms were obtained in the crystalline state. In protic solvents adducts of types 7 and 12 are formed, some of which are stable in the crystalline state. IR, NMR and mass spectra of compounds 5–7 and 12, and several dark reactions, are discussed.
通过二酰基衍
生物4的闭环获得的标题化合物5和/或其二聚体6以单体和二聚体形式存在于非质子溶剂中,平衡的位置取决于取代基和溶剂的性质。在一些情况下,以结晶状态获得纯的单体和二聚体形式。在质子溶剂中,形成了类型7和12的加合物,其中一些在结晶状态下是稳定的。讨论了化合物5-7和12的IR,NMR和质谱图,以及一些暗反应。