Synthesis of novel tricyclic heterocycles from 2- [3-Methyl - 1,2 dihydroquinoxalin - 2 -ylidene] malononitrile

ABSTRACT

A number of pyrrolo [1.2-a]quinoxalines [3a-f], pyrimidol [1,6-a]quino-xalines [5a-c. 10.13]. pyrido[1.2-a]quinoxalines [6, 7a.b, 8a.b. 14]. [1.3] thiazino-[3,4-]quinoxalines [9, 11] and [1.3] oxazino [3,4-a]quinoxalines [12a.b] were obtained via interaction of 2-[3-methyl-1.2-dihydrquinoxalin-2-ylidene]malono-nitrile 2 with different reagents