Studies on Quinoxaline N-Oxides. VII. : Reaction of Quinoxaline 1-Oxide with Phenyl isocyanate.

Abstract

In the reaction of quinoxaline 1-oxide (I) and phenyl isocyanate, 2-anilinoquinoxaline (II), 1, 3-diphenyl-1-(2-quinoxalinyl) urea (III), and 1, 3-diphenyl-1H-imidazo [4, 5-b] quinoxalin-2 (3H)-one (VI) are obtained according to reaction conditions. This reaction course was explained as shown in Chart 2.