ISOLATION OF THE INTERMEDIATES AND IMPROVED SYNTHESIS OF PYRIDO[1',2'/1,2]IMIDAZOL[4,5-B]PYRAZINES AND PYRIDO[1',2'/1,2]IMIDAZOL]4,5-B]QUINOXALINES

被引：12

作者：

KATOH, A

UEDA, SH

OHKANDA, J

HIROTA, M

KOMINE, H

MITSUHASHI, K

机构：

[1] Department of Industrial Chemistry, Faculty of Engineering, Seikei University, Musashino-shi, Tokyo

来源：

HETEROCYCLES | 1992年 / 34卷 / 10期

关键词：

D O I：

10.3987/COM-92-6136

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

2-(Pyrid-2'-yl)amino-3-chloro-5,6-dicyanopyrazines (IIa, IId, and IIe) and 2-(pyrid-2'-yl)amino-3-chloro-6-nitroquinoxalines (Va-c) were isolated for the first time in the course of the reaction of 2,3-dichloro-5,6-dicyanopyrazine (1) and 2,3-dichloro-6-nitroquinoxaline (IVa), respectively, with 2-aminopyridines. Furthermore, the yield of pyrido[1',2':1,2]imidazo[4,5-b]quinoxalines was remarkably improved due to the modification of the reaction conditions.

引用

页码：1965 / 1972

页数：8

共 7 条

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