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Nitroketenaminals, VII: Synthesis of substituted 2-amino-3-nitropyridines from 1,3-biselectrophiles and 2-nitroethen-1,1-diamine
Troschutz,Luckel
, p. 785 - 789 (1992)
The reaction of the enones 1a-f with the nitroketenaminal 2 leads to the 4,6-disubstituted 2-amino-1,4-dihydro-3-nitropyridines 3a-f. Compounds 3a-c,f are oxidized in low yields by air to the pyridines 4a-c,f.-5- and 6-substituted 2-amino-3-nitropyridines (9a,b and 11) can be prepared from 2, 8a,b, and 10, respectively.
