Patent ID: 7122228
Filing Date: 2006-10-17
Classification: C07C,C09K

Abstract:
1. A compound having negative Δε of the formula (Ia) or (Ib) wherein: R, in each case independently of one another, is an alkyl or alkoxy radical having 1–12 carbon atoms which is unsubstituted, monosubstituted by —CF A, in each case independently of one another, is 1,4-phenylene, in which ═CH— may be replaced once or twice by ═N— and which may be mono- to tetrasubstituted, independently of one another, by halogen, —CN, —CH Z, in each case independently of one another, is a single bond, a —CH X is —F, —Cl, —CN, —NCS, —CF Y, V each is, independently of one another, hydrogen, or alkyl having 1–15 carbon atoms, alkoxy having 2–15 carbon atoms, alkenyl having 2–15 carbon atoms, or alkynyl having 1–15 carbon atoms, which is unsubstituted, monosubstituted by —CF Y is additionally —F or —Cl, W, in each case independently of one another, is —O—, —C(O)—, —CHF— or —CF n, m each is, independently of one another, 0, 1, 2, 3 or 4 and the dotted line is a single bond or a double bond, with the proviso that n in formula (Ia) is 1. 2, 3, or 4.