title: Synthesis and some reactions of 3-chloro-2-(cyanomethylene)-1,2-dihydroquinoxalines.
abstract: 2,3-Dichloroquinoxaline and some of its derivatives have been reacted with malononitrile and ethyl cyanoacetate to yield a variety of 3-chloro-2-(cyanomethylene)- 1,2-dihydroquinoxaline derivatives. The reaction of 3-chloro-2-(dicyanomethylene)-1,2- dihydroquinoxaline (2e) with pyridine and its methyl derivatives led to the zwitterionic structures 6a-6c. The structures of the newly synthesized compounds were assigned by spectroscopic data and elemental analyses.
authors.affiliation: Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria. craigoba@oauife.edu.ng
authors.forename: Craig A
authors.initials: CA
authors.lastname: Obafemi
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Pfleiderer
mesh_terms: D017606:Chlorine Compounds / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure; D011725:Pyridines / Q000737:chemistry; D011810:Quinoxalines / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D017606:Chlorine Compounds; D011725:Pyridines; D011810:Quinoxalines