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Synthesis and Tautomerism of Novel Quinoxalines (Part II)
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 Title & Authors
Synthesis and Tautomerism of Novel Quinoxalines (Part II)
Ho Sik Kim; Kyung Ok Choi; Woo Sung Lim;
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 Abstract
The reaction of 6-chloro-3-methoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline(5) or 3-methoxycarbonylmethylene-6-nitro-2-oxo-1,2,3,4-tetrahydroquinoxaline(6) with hydrazine hydrate gave 3-hydrazinocarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxalines(7, 8). The reaction of compound 7 or 8 with substituted benzaldehydes or heteroaromatic aldehydes afforded quinoxalines(9-14). Compounds showed the tautomerism between the enamine and methylene imine forms, and between the enamine, methylene imine and enaminol forms in dimethyl sulfoxide solution. The tautomer ratios were determined by the 1H NMR.
 Keywords
Quinoxalines;Tautomerism;
 Language
Korean
 Cited by
1.
Pyrido[2,3-b]pyrazine 유도체의 합성 (제1보),김호식;김광식;여윤희;

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