Synthesis of 5-arylpyrimidine-2-carboxylic acids and the liquid-crystal characteristics of their aryl esters

5-Arylpyrimidine-2-carboxylic acids were synthesized by the hydrolysis of 5-aryl-2-cyanopyrimidines and the oxidation of 5-aryl-2-styrylpyrimidines under the conditions of phase-transfer catalysis. The aryl esters of the acids were obtained, and their liquid-crystal characteristics were studied. The...

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Veröffentlicht in:	Chem. Heterocycl. Compd. (Engl. Transl.); (United States) 1986-03, Vol.22 (3), p.310-318
Hauptverfasser:	Mikhaleva, M. A., Kolesnichenko, G. A., Rubina, K. I., Gol'dberg, Yu. Sh, Savel'ev, V. A., Leitis, L. Ya, Shimanskaya, M. V., Mamaev, V. P.
Format:	Artikel
Sprache:	eng
Schlagworte:	360602 - Other Materials- Structure & Phase Studies 360603 - Materials- Properties 400201 - Chemical & Physicochemical Properties ALKALI METAL COMPOUNDS AROMATIZATION AZINES CARBOXYLIC ACID ESTERS CARBOXYLIC ACIDS CATALYSTS CATALYTIC EFFECTS CHALCOGENIDES CHEMICAL REACTION YIELD CHEMICAL REACTIONS CHLORINE COMPOUNDS CRYSTALS CYANIDES DECOMPOSITION DIELECTRIC PROPERTIES ELECTRICAL PROPERTIES ESTERS FLUIDS HALOGEN COMPOUNDS HETEROCYCLIC COMPOUNDS HYDROGEN COMPOUNDS HYDROGEN PEROXIDE HYDROLYSIS HYDROXIDES INFRARED SPECTRA INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY LIQUID CRYSTALS LIQUIDS LYSIS MANGANESE COMPOUNDS MASS SPECTRA MATERIALS SCIENCE MATERIALS TESTING NMR SPECTRA ORGANIC ACIDS ORGANIC COMPOUNDS ORGANIC NITROGEN COMPOUNDS OXIDATION OXIDES OXYGEN COMPOUNDS PERCHLORATES PERMANGANATES PEROXIDES PHASE STUDIES PHYSICAL PROPERTIES POTASSIUM COMPOUNDS POTASSIUM PERMANGANATES PYRIMIDINES SELENIUM COMPOUNDS SELENIUM OXIDES SODIUM COMPOUNDS SODIUM HYDROXIDES SOLVOLYSIS SPECTRA SYNTHESIS TESTING TRANSITION ELEMENT COMPOUNDS YIELDS
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Zusammenfassung:	5-Arylpyrimidine-2-carboxylic acids were synthesized by the hydrolysis of 5-aryl-2-cyanopyrimidines and the oxidation of 5-aryl-2-styrylpyrimidines under the conditions of phase-transfer catalysis. The aryl esters of the acids were obtained, and their liquid-crystal characteristics were studied. The p-substituted aryl esters of 5-phenylpyrimidine-2-carboxylic acid do not exhibit mesomorphism, but the introduction of a butyloxy group at the p position of the phenyl residue leads to the appearance of nematic characteristics. Aryl 5-phenylpyrimidinylcarbonyloxy-benzoates are nematic liquid crystals with a thermally stable meso phase and an existence range of 50-80/sup 0/C.
ISSN:	0009-3122 1573-8353
DOI:	10.1007/BF00515002