Process for preparing highly pure enantiomers of oxirane alcohol

Details Process for preparing highly pure enantiomers of oxirane alcohol Process for preparing highly pure enantiomers of oxirane alcohol

1993-07-28

1995-12-26

Cook, Rebecca

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549215, 549332, 549546, 549555, C07D30314, C07D30302, C07F 708, C07B 5700

Patent

active

054789540

ABSTRACT:
Process for preparing highly pure enantiomers of oxirane alcohols, which comprises recrystallizing a mixture of the isomeric oxirane alcohols, in which the desired enantiomer is present in an excess of at least 60% ee, in a solvent or solvent mixture at a temperature just below the melting point of the oxirane alcohol.
Oxirane alcohols prepared according to the invention are distinguished by high enantiomer purity. Ferroelectric liquid crystals, which contain highly pure enantiomers of oxirane alcohols according to the invention and/or derivatives derived therefrom, have particularly short switching times.

REFERENCES:
patent: 4638073 (1987-01-01), Walba et al.
patent: 5178793 (1993-01-01), Vohra et al.
Perry, Chemical Engineer's Handbook, fifth edition, 1973, 17-8 through 17-13.
J. Am. Chem. Soc., "Catalytic Asymmetric Epoxidation and Kinetic Resolution: Modified Procedures Involving in Situ Derivatization", 1987, vol. 109, pp. 5765-5780.
J. Org. Chem., "Ti(O-i-Pr)--Mediated Formation of 2,3-Epithio Alcohols from 2,3-Epoxy Alcohols", 1988, vol. 53, pp. 4114-4116.

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