Optically active carboxylic esters of oxygen-containing heterocy

Details Optically active carboxylic esters of oxygen-containing heterocy Optically active carboxylic esters of oxygen-containing heterocy

1992-04-17

1994-10-11

Tucker, Philip

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

544238, 544241, 544296, 544315, 544318, 544334, 544335, 544357, 544408, 544409, 546256, 546258, 546263, 546286, 546288, 546289, 546290, 2522996, C09K 1934

Patent

active

053545001

ABSTRACT:
Use of optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them.
Optically active 1,3-dioxolane-4-carboxylic esters and oxirane-2-carboxylic esters of the general formula (I)

REFERENCES:
patent: 4638073 (1987-01-01), Walba et al.
patent: 4988459 (1991-01-01), Scherowsky et al.
Sequin, V., Helvetica Chimica Acta-vol. 64, Fasc. 8, (1981), pp. 2654-2664.
Newman, et al., "The Conversion of Phenols to Thiophenols via Dialkylthiocarbamates", J. Org. Chem. 31, 3980 (1966).
Mitsunobu, "The Use of Diethyl Azodicarboxylate and Triphenylphosphine in Synthesis and Transformation of Natural Products", Synthesis, 1 (1981).
Corriu et al., "Activation of Grignard Reagents by Transition-metal Complexes. A New and Simple Synthesis of trans-Stilbenes and Polyphenyls", J. Chem. Soc., Chem. Comm., 144 (1972).
Tamao et al., "Selective Carbon-Carbon Bond Formation by Cross-Coupling of Grignard Reagents with Organic Halides", J. Am. Chem. Soc. 94, 4374 (1972).
Tamao et al., "Stereochemistry of the nickel-catalyzed cross-coupling reaction of Grignard reagents with olefinic halides: stereospecific versus nonstereospecific-stereoselective reactions", J. Organomet. Chem. 55, C 91 (1973).

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