3-ALKANOYL- AND 3-ALKYL DERIVATIVES OF 16-ARYLIDENE ESTRONES AND CHIRAL-NEMATIC LIQUID-CRYSTALLINE MIXTURE

摘要

The invention relates to 3-alkanoyl- and 3-alkyl derivatives of 16-arylidene estrones of general formula: EMBED ISISServer wherein R1 = H, R2 = R3 = OCH3, R4 = CH3CO; or R1 = H, R2 = R3 = OCH3, R4 = C2H5CO; or R1 = H, R2 = R3 = OCH3, R4 = C3H7CO; or R1 = R2 = OCH3, R3 = H, R4 = CH3; or R1 = H, R2 = R3 = OCH3, R4 = C2H5; or R1 = H, R2 = R3 = OCH3, R4 = C4H9; or R1 =H, R2 = R3 = OCH3, R4 = C6H13; or R1 = H, R2 = R3 = OCH3, R4 = C7H15; or R1 = R2 = OCH3, R3 = H, R4 = C7H15. The invention further relates to chiral-nematic liquid-crystalline mixture containing nematic matrix and optically active chiral admixture.