SCHEDULED MAINTENANCE
The synthesis of 1,4-dihydropyridines unsubstituted in the 1-, 2-, and 6-positions from methyl propiolate, aromatic aldehydes, and ammonium acetate in acetic acid is described. The products were oxidised to the corresponding pyridines. Certain features of their n.m.r. spectra are discussed.
T. Chennat and U. Eisner, J. Chem. Soc., Perkin Trans. 1, 1975, 926 DOI: 10.1039/P19750000926
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