Patent ID: 6458433
Filing Date: 2002-10-01
Classification: C07B,C07C,C07F,C09K

Abstract:
A liquid crystalline compound expressed by the general formula (1) wherein R1 represents an alkyl group having 1 to 15 carbon atoms in which alkyl group not-adjacent any methylene group may be replaced by oxygen atom or vinylene group, and any hydrogen atom in the alkyl group may be replaced by fluorine atom; ring A1, ring A2, and ring A3 independently represent trans-1,4-cyclohexylene group, trans-1,4-silacyclohexylene group, pyrimidine-2,5-diyl group, pyridine-2,5-diyl group, 1,3-dioxane-2,5-diyl group, tetrahydropyran-2,5-diyl group, 1,3-dithian-2,5-diyl group, or tetrahydrothiopyran-2,5-diyl group, or 1,4-phenylene group in which one or more hydrogen atoms on the six-membered ring may be replaced by a fluorine atom; X1, X2, and X3 independently represent â€”(CH2)4â€”, â€”(CH2)3Oâ€”, â€”O(CH2)3â€”, or single bond, provided that one of X1, X2, and X3 represents â€”(CH2)4â€”, â€”(CH2)3Oâ€”, or â€”O(CH2)3â€”, and the others represent single bonds; Y1 represents hydrogen atom or an alkyl group having 1 to 15 carbon atoms in which alkyl group not-adjacent any methylene group may be replaced by oxygen atom or vinylene group; m and n are independently 0 or 1, provided that when both m and n are 0, and ring A1 represents trans-1,4-cyclohexylene group, then X1 represents â€”(CH2)4â€”, that when m is 1, n is 0, and both ring A1 and ring A2 represent trans-1,4-cyclohexylene group, then X2 represents single bond, and that when m is 0, n is 1, and both ring A1 and ring A3 represent trans-1,4-cyclohexylene group, then X3 represents single bond; and any atom which constitutes this compound may be replaced by its isotope.