Cyclocondensation of ethyl 2-alkoxy-2-isocyanato-3,3,3-trifluoropropianates (novel 1,4-bielectrophiles) with primary amines resulted in 5-trifluoromethylimidazolidine-2,4-diones.
乙基2-烷氧基-2-
异氰酸酯-
3,3,3-三氟丙酸酯(新型1,4-双电子亲电试剂)与一级胺的环化缩合反应生成5-三
氟甲基
咪唑啉-2,4-二酮。