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Molecules 2004, 9(4), 223-231; doi:10.3390/90400223
Article

Synthesis and Some Reactions of 3-Chloro-2-(cyanomethylene)-1,2-dihydroquinoxalines

1,*  and 2
1 Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Osun State. Nigeria 2 Fachbereich Chemie, Konstanz University, D-78457 Konstanz, Germany
* Author to whom correspondence should be addressed.
Received: 16 December 2003 / Revised: 11 February 2004 / Accepted: 20 February 2004 / Published: 31 March 2004
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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.
Keywords: 2; 3-Dichloroquinoxaline; ethoxycarbonylcyanomethylene- and dicyano- methylene-3-chloro-1; 2-dihydroquinoxalines; betaine structures; spectroscopic data 2; 3-Dichloroquinoxaline; ethoxycarbonylcyanomethylene- and dicyano- methylene-3-chloro-1; 2-dihydroquinoxalines; betaine structures; spectroscopic data
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Obafemi, C.A.; Pfleiderer, W. Synthesis and Some Reactions of 3-Chloro-2-(cyanomethylene)-1,2-dihydroquinoxalines. Molecules 2004, 9, 223-231.

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