15804-19-0, Name is Quinoxaline-2,3(1H,4H)-dione, belongs to quinoxaline compound, is a common compound. Application In Synthesis of Quinoxaline-2,3(1H,4H)-dioneIn an article, once mentioned the new application about 15804-19-0.
Synthesis and Some Reactions of 3-Chloro-2-(cyanomethylene)-1,2-dihydroquinoxalines
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-c. The structures of the newly synthesized compounds were assigned by spectroscopic data and elemental analyses.
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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N370 | ChemSpider