Abstract
1,4-dihydropyridines, namely diethyl 4-(4-fluorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (1a), diethyl 2,6-dimethyl-4-(3,4,5-trimethoxyphenyl)-1,4-dihydropyridine-3,5-dicarboxylate(1b), and diethyl 4-(3,4-dimethoxyphenyl)-2,6-dihydroxy-2,6-bis(trifluoromethyl)piperidine-3,5-dicarboxylate (2), are synthesized by one-pot multicomponent condensation of aromatic aldehyde with ethyl acetoacetate and liquid ammonia in the presence of an ethanol-water mixture and are characterized by single crystal X-ray diffraction. The effect of a fluorine atom on the dihydropyridine nucleus give insight into the self-assembly of compounds with various types of non-covalent interactions that greatly affect the crystal packing.
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The CIF files have been deposited with the Cambridge Crystallographic Data Centre. The deposition number of compounds 1a, 1b, and 2 is CCDC-1889500, 1939480, and 1889485 respectively. These data can be obtained free of charge at www.ccdc.cam.ac.ul/conts/retrieving.html [or from the Cambridge Crystallographic Data Centre (CCDC), 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44(0)1223-336033; email: deposit@ccdc.cam.ac.uk.
Text © The Author(s), 2020, published in Zhurnal Strukturnoi Khimii, 2020, Vol. 61, No. 6, pp. 991–1000.
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Shashi, R., Prasad, N.L. & Begum, N.S. One-Pot Synthesis of 1,4-Dihydropyridine Derivatives and Their X-Ray Crystal Structures: Role of Fluorine in Weak Interactions. J Struct Chem 61, 938–947 (2020). https://doi.org/10.1134/S0022476620060141
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DOI: https://doi.org/10.1134/S0022476620060141