The influence of new chiral additives on phase transitions of binary mixtures of some cholesteric liquid crystals

摘要

We present the study of influence of new chiral additives I_c and I_d on phase transitiion of binary mixtures of cholesteryl nonanoate with cholesteryl myristate. The new chiral additives were synthesized starting from 3-benzyloxy-17-hydroxy-16, 17-secoestra-1, 3, 5(10)-trien-16-nitrile (I_a), obtained in a multistep synthetic route from estrone. Compound I_a was converted to its tosylate ester (I_b), which upon action of tetrabutyl ammonium fluoride afforded I_c, On the other hand, the reaction of compound I_a with glutaric acid anhydride in pyridine resulted in I_d formation.