Acyclic Derivatives

Amphiphilic Carbohydrate-Based Mesogens, 2 [1] Aldose Di-n-alkyl Dithioacetals: Novel Double-Tailed Thermotropic Liquid Crystals

“…The interest in such compounds has escalated recently and new stable non-glycosidic mesogens which have been reported include l-O-and S-n-alkyl alditols [3,4], l-0-n-alkyl-2,5-anhydro-hexitols [5], l-C-n-alkyl-2,5-anhydro-L-iditols [6] and the naturally occurring 1-C-rc-alkyl tetraols [7], In the course of our work concerned with structure -property correlations of amphiphilic carbohydrates, it has now been found that simple doubletailed aldoses, such as aldose di-n-alkyl dithioacetals having sufficiently long n-alkyl chains are thermotropic mesogens. Aldose di-rt-alkyl dithioacetals are readily prepared by condensation of aldoses with «-alkyl thiols in the presence of acid catalyst [8,9].…”