-Acylated α-aminonitriles and their conversion into 5-aminooxazole, 5(4)-oxazolone and 4(5)-imidazolone derivatives
作者:P. Verschave、J. Vekemans、G. Hoornaert
DOI:10.1016/0040-4020(84)80023-x
日期:1984.1
In contrast with the reaction of α-aminonitriles a, the corresponding -acylated α-aminonitriles b-f and oxalyl chloride do not yield pyrazinone derivatives, but 5-aminooxazoles - or 4(5)-imidazolones , the latter being converted in some cases into imidazo [2,1-]isoquinoline-2,5,6(3)-triones. Reactions of compounds b-f and ethyl chlorooxoacetate provide evidence for a 5(4)-iminooxazole intermediate
与α-
氨基腈a的反应相反,相应的酰化α-
氨基腈bf和
草酰氯不会生成
吡嗪酮衍
生物,但会生成
5-氨基恶唑-或4(5 )-
咪唑啉酮,后者在某些情况下会转化为
咪唑并[2,1- ]
异喹啉-2,5,6 (3 )-三酮。化合物bf与
氯氧
乙酸乙酯的反应提供了5(4 )-亚
氨基
恶唑中间体的证据,该中间体芳香化生成
5-氨基恶唑- 。但是,不可芳香化的中间体类型-
水解后可分离为5(4 )y-
恶唑酮-经过催化的Dimroth型重排生成
咪唑酮衍
生物。