60397-04-8Relevant academic research and scientific papers
ν-Triazolines. Part 36. New synthesis of ethyl 1-alkyl-1,4,5,6-tetrahydro-6-oxopyridine-3-carboxylates and 1-alkyl-1,4,5,6-tetrahydro-6-oxopyridine-3-carbonitriles through reduction of N-2-nitroarylamidines
Angelini, Roberto,Erba, Emanuela,Pocar, Donato
, p. 837 - 840 (2007/10/03)
Ethyl 1-alkyl-1,4-dihydropyridine-3-carboxylates 2a-d and 1-alkyl-1,4-dihydropyridine-3-carbonitriles 2e,f were allowed to react with 2-nitrophenyl azide 3 to give tertiary amidines 4 by spontaneous rearrangement of the triazoline cycloadducts. Ready catalytic hydrogenation with Pd-C of 4 gave the corresponding ethyl 1-alkyl-6-oxo-1,4,5,6-tetrahydropyridine-3-carboxylates 5a-d and 1-alkyl-6-oxo-1,4,5,6-tetrahydropyridine-3-carbonitriles 5e,f.
