The syntheses of new liquid crystalline 3-aryl-5-alkylisoxazoles, 3-aryl-5-alkyl-1H-pyrazoles and 3-aryl-5-alkyl-2-isoxazolines with ether or ester bridges are reported. The key stage in the synthesis is the oxidation of the 2-isoxazoline ring to isoxazole. The influences of coreheterocycle type and bridging group on the mesomorphic properties for the prepared compounds are discussed.
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