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The synthesis of cholest-5-ene-3 beta-carboxylates and a comparison of their mesomorphic behaviour with isomeric cholesterol esters with a reversed ester linkage

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JournalLIQUID CRYSTALS
DatePublished - Apr 2000
Issue number4
Volume27
Number of pages7
Pages (from-to)443-449
Original languageEnglish

Abstract

The syntheses of seven esters of cholest-5-ene-3 beta-carboxylic acid are reported and the melting points, transition temperatures and mesophase morphologies of the esters are compared with those of the isomeric 3 beta-cholesterol compounds which have the ester link reversed. For the examples reported, the cholest-5-ene-3 beta-carboxlates always have significantly lower melting points, but the differences in clearing temperatures for the two series of esters are usually much less. Several of the new compounds give an increased chiral nematic phase range and an intense selective reflection of light. They therefore represent a novel type of chiral nematic material for use in thermochromic applications.

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