Summary.
In continuation of previous work some novel 3,5-diacetyl-1,4-dihydropyridine derivatives were synthesized and their photochemical behavior was studied under oxygen and argon atmosphere. Oxidation of the dihydropyridine ring and formation of pyridine derivatives was the result of the reaction. The presence of oxygen affects not only on the rate of oxidation, but also the formation of some unidentified by-products was observed on irradiation under this atmosphere.
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Memarian, H., Bagheri, M. & Döpp, D. Synthesis and Photochemistry of Novel 3,5-Diacetyl-1,4-dihydropyridines. II [1]. Monatshefte für Chemie 135, 833–838 (2004). https://doi.org/10.1007/s00706-003-0139-5
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DOI: https://doi.org/10.1007/s00706-003-0139-5