Synthesis and mesomorphic properties oftrans-[1,4-bis(5-R-pyrimidin-2-yl]-cyclohexanes and 1,2-bis-(5-R-pyrimidin-2-yl)ethanes

New trans-bis(5-R-pyrimidin-2-yl)-1,4-cyclohexanes and-1,2-ethanes (R=C₇H₁₅, C₆H₄OR¹, where R¹=H, COCH₃, C₄H₉, C₅H₁₁, C₈H₁₇) have been synthesized. Only nematic mesophases are found from a study of their mesomorphic properties, except for bis5-(4-octyloxyphenyl)- and-(4-acetoxyphenyl)pyrimidin-2-yl)-cyclohexanes, which also exhibit smectic properties.Novosibirsk Institute of Organic Chemistry of the Siberian Division of the Russian Academy of Sciences, Novosibirsk 630090, Russia; e-mail: benzol@nioch.nsc.ru. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 355–360, March, 1999.