PROCESS FOR OBTAINING CHOLESTERIC LIQUID CRYSTALS BY STEREOSELECTIVE RECRYSTALLIZATION

摘要

Process for synthesizing polymers +, PTOBEE (C26H20O8)n and PTOBDME (C34H36O8)n, with the addition of acid dichloride and DL-treo-1,2-butanediol in Cl-naphtalene and DL-1,2-dodecanediol with diphenyl oxide, respectively, by passing them through a nitrogen stream at room temperature, heating the mixture, settling in toluene the mixture and filtering. In the resulting settling toluene, the polymer precipitates the enantiomer (-) PTOBEE. The compounds obtained are of the cholesteric liquid crystal type, obtained by stereoselective recrystallization in toluene.