Optically active dioxolanylacrylic and dioxolanylpropionic acid esters containing a mesogenic residue, a process for manufacturing them and their use as doping agents in liquid crystal mixtures

Abstract From the Canadian patent

Abstract of the disclosure Optically active dioxolanylacrylates and dioxolanylpropionates carrying a mesogenic radical a process for, their preparation, and their use as dopes in liquidcrystal mixtures. Optically active 1,3-dioxolane derivatives carrying a, mesogenic radical, of the general formula (I) (I), are suitable as dopes in - in particular ferroelectric liquid-crystal mixtures. The symbols in the general formula have the following meaning here: R1 is constructed analogously to the moiety of the general formula on the right of X or is an alkyl or alkylene sic radical which may be substituted, R2 R3 and R4 are, H or alkyl (R4 is alternatively alkenyl) which may also, be substituted R2 …