Abstract: Process comprising the following steps: (a) preparation of liposomes (bilayers) by extrusion from lipids, such as dimiristoylphosphatidylcholine; (b) preparation of polymers (−) PTOBEE (C26H20O8)n, both being liquid crystals of the cholesteric type; ( ) addition of the polymers to the suspension of liposomes. These systems have biomedical and pharmacologic applications such as ‘stealth liposomes’, or ‘ghost liposomes’, for the encapsulation of drugs with, as a result, an extension of their average life in the blood flow.

Abstract: 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-naphthalene 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.