Efficient synthesis of (5-oxo-6,7-dihydro-4H-[1,2,4]triazolo-[1,5-a]pyrimidin-6-yl)acetanilides based on the recyclization of N-arylitaconimides with 3-amino[1,2,4]triazoles
作者:Yu. A. Kovygin、D. Yu. Vandyshev、I. V. Ledenyova、E. A. Kosheleva、V. A. Polikarchuk、O. A. Kozaderov、Kh. S. Shikhaliev
DOI:10.1007/s11172-021-3118-2
日期:2021.3
A convenient method for the synthesis of 2-(2-R-5-oxo-6,7-dihydro-4H-[1,2,4]triazolo-[1,5-a]pyrimidin-6-yl)acetanilides based on the regioselective domino reaction of N-arylitaconimides with substituted 3-aminotriazoles was proposed. Presumably, the reaction pathway includes the conjugated aza-addition of the endo-nucleophilic center of triazole to imide, followed by the recyclization of the intermediate
合成2-(2-R-5-oxo-6,7-dihydro-4 H- [1,2,4] triazolo- [1,5 - a ]嘧啶-6-基)乙酰苯胺的简便方法提出了基于N-芳基衣康酰亚胺与取代的3-氨基三唑的区域选择性多米诺反应的方法。据推测,反应途径包括三唑的亲核中心与酰亚胺的氮杂加成共轭,然后将中间体环化成三唑并[1,5- a ]嘧啶。