Abstract
1H NMR spectra of some N-substituted 2-amino-3-nitro-and 2-amino-5-nitropyridines were measured and interpreted. Chemical shift assignments were based on existing chemical shift rules for substituted pyridines and spectral comparison with compounds of similar structure. The splitting of the methyl group signal of the methylamino group into a doublet testifies that the investigated compounds exist, in the amino form. Someortho-amino- andortho-alkylaminonitropicolines were found to give splitting of the amino signals due to intramolecular hydrogen bonding and steric hindrance.
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Department of Organic Chemistry, Academy of Economics, PL-53 432 Wroclaw, Poland. Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 637–642, May, 1997.
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Wandas, M., Palasek, B., Puszko, A. et al. 1H NMR spectra of some nitro derivatives of 2-alkylamino-, 2-phenylamino-, 2-piperidyl-, 2-morpholyl-, 2-(N-alkyl-N-nitrosoamino)-, and 2-alkylnitramino-4(or 6)-methylpyridines. Chem Heterocycl Compd 33, 551–556 (1997). https://doi.org/10.1007/BF02291938
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DOI: https://doi.org/10.1007/BF02291938