R. Angelini, E. Erba, D. Pocar
1996
Citations
0
Influential Citations
2
Citations
Journal
Journal of The Chemical Society-perkin Transactions 1
Abstract
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.