Phase Diagram and Preparation of CE2 Enantiomers

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Abstract
The synthesis of (L)-(-)-4″-(2-methylbutylphenyl) 4″-(2-methylbutyl)-4-biphenylcar-boxylate (CE2) and related chiral liquid crystals has been discussed by Gray and McDonnell. We present here the first synthesis of the enantiomer of CE2 and we use it to measure the temperature-chirality phase diagram of the biue phases of CE2. This diagram is compared with that obtained using the CE2 “racemate” containing nonen-antiomeric optical isomers of CE2. The synthesis of (R)-(+)-2-methylbutan-l-ol which has been developed will be broadly useful for the preparation of other chiral liquid crystals having optically active (R)-2-methylbutyl sidechains.