Reaction of 3,5-dicyano-2,4,4,6-tetramethyl-1,4-dihydropyridine with nitric acid
1984 ◽
Vol 49
(11)
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pp. 2620-2627
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Keyword(s):
H Nmr
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Reaction of the title compound I with nitric acid in acetic afforded a mixture of products which on column chromatography afforded 5-cyano-4,4,6-trimethyl-2-nitromethylene-3-oxo-1,2,3,4-tetrahydropyridine (II), (Z)-5-(1-acetoxy-2-nitrovinyl)-3,5-dicyano-4,4-dimethyl-2-pyrazoline (III) and 3-acetoxy-3-cyano-4,4,6-trimethyl-5-oxo-2,3,4,5-tetrahydropyridazine (IV). Reaction of I with nitrating mixture in chloroform gave only the compound II. The probable mechanism of formation of compounds II, III and IV, together with their 1H NMR, 13C NMR, IR and mass spectra, is discussed.
1980 ◽
Vol 45
(2)
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pp. 548-558
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1975 ◽
Vol 30
(7-8)
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pp. 634-635
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2009 ◽
Vol 2009
(4)
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pp. 261-264
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2008 ◽
Vol 2008
(11)
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pp. 609-612
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