Patent ID: 7276633

Claim:
A process for preparing a compound of formula (I) R-(A 1 -Z-) m , B—CF 2 O-A 2 -(A 3 ) n —R′ (I) in which R is alkyl, in which one or more CH 2 groups are optionally replaced, independently of one another, by O, CF 2 , CH═CH, CH═CF or CF═CF, with the proviso that peroxide structures O—O and formaldehyde acetals O—CH 2 —O are excluded, A 1 is, independently of one another, 1,4-cyclohexylene, 2,5-1,3-dioxanylene, 1,3-cyclobutylene or A 2 and A 3 are 1,4-phenylene, in which, independently of one another, from one to four hydrogens are optionally replaced by fluorine or one or two CH groups are optionally replaced by N, Z is a single bond, —CH 2 —CH 2 —, —CF 2 —CF 2 —, —CH═CH—, —CF═CF—, —CH═CF— or —CF═CH—, B is 2,6-disubstituted trans-decalin, R′ is R, F, OCF 3 , OCF 2 H, CF 3 , Cl, SF 5 , CN or NCS, and m and n are, independently of one another, 0 or 1, said process comprising the following steps: a) converting a compound of formula (II) R-(A 1 -Z-) m BX (II), in which X is halogen or ═O, into a carboxylic acid or a salt of a carboxylic acid with elimination of the group X; and b) converting said carboxylic acid or salt of a carboxylic acid using a phenol of formula (III) HO-A 2 (-A 3 ) n —R ′ (III), to obtain a compound of formula (I).