An efficient synthesis of new polyfunctional hexahydro pyrido[1,2-a]pyrazin-1-ones
作者:Yana Yu. Shmoylova、Yuri A. Kovygin、Irina V. Ledenyova、Mikhail A. Prezent、Elena D. Daeva、Sergey V. Baranin、Khidmet S. Shikhaliev
DOI:10.1016/j.mencom.2021.03.039
日期:2021.3
New polyfunctional hydrogenated pyrido[1,2-a]pyrazin- 1-ones were obtained by regioselective recyclization of N-arylitaconimides with alkyl (3-oxopiperazin-2-ylidene)acetates. The supposed cascade reaction pathway involves the Michael addition of the nucleophile to an activated double bond and subsequent intramolecular transamidation of the intermediate with simultaneous recycling.
通过用烷基(3-氧代哌嗪-2-亚烷基)乙酸酯对N-芳基衣康酰亚胺的区域选择性再循环,获得了新的多官能氢化吡啶并[1,2 - a ]吡嗪-1-酮。所谓的级联反应途径涉及亲核试剂的迈克尔加成至活化的双键,以及随后的中间体的分子内氨基转移,同时进行再循环。
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。
Synthesis of new tetrahydropyrido[1,2-a]benzimidazoles based on recyclization of N-arylitaconimides with 2-cyanomethylbenzimidazole
作者:Yana Yu. Shmoylova、Yuri A. Kovygin、Irina V. Ledenyova、Mikhail A. Prezent、Sergey V. Baranin、Khidmet S. Shikhaliev
DOI:10.1016/j.mencom.2021.03.037
日期:2021.3
SVETLIK, JAN;VEVERKA, MIROSLAV, LIEBIGS ANN. CHEM.,(1990) N, C. 111-112
作者:SVETLIK, JAN、VEVERKA, MIROSLAV
DOI:——
日期:——
Efficient synthesis of tetrahydro-1H-pyrazolo[3,4-b]pyridines based on the recyclization of N-arylitaconimides with aminopyrazoles
作者:Yana Yu. Shmoylova、Yuri A. Kovygin、Evgeniya A. Kosheleva、Khidmet S. Shikhaliev、Irina V. Ledenyova、Mikhail A. Prezent