作者:O. Tsuge、T. Itoh、M. Tashiro
DOI:10.1016/s0040-4020(01)82531-x
日期:1968.1
chloride progressed smoothly, forming the corresponding isocyanate, which in turn gave quantitatively the corresponding bifunctional acylurea on treatment with aniline in all cases except phthaloyl isocyanate. In the reaction of succin- or adipamide, however, the amide required a large amount of oxalyl chloride, and in addition to the expected isocyanate, 1,2-bis[2-(1,3-oxazolidine-4,5-dione)] ethanediylidene
已经尝试根据Speziale的方法制备脂族和芳族二异氰酸二异氰酸酯。癸二酰胺,邻苯二甲酰,间苯二甲酰和对苯二甲酰胺与草酰氯的反应进展顺利,形成了相应的异氰酸酯,在所有情况下,除邻苯二甲酰异氰酸酯外,在用苯胺处理后,定量给出了相应的双官能酰脲。然而,在琥珀酰胺或己二酰胺的反应中,该酰胺需要大量的草酰氯,并且除了预期的异氰酸酯外,还需要1,2-双[2-(1,3-恶唑烷-4,5-二酮)得到乙二叉基或1,3-二吡啶基咪唑啉-2,4,5-三酮。还提供了上述副产物的肼解和苯胺分解。