Patent ID: 6090308
Filing Date: 2000-07-18
Classification: C07C,C08F,C09K

Abstract:
A mixture of three or more direactive mesogenic compounds, which comprises at least one compound of each of the formulae IV, V and VI,R.sup.1 --(CH.sub.2).sub.m --O-MG-O--(CH.sub.2).sub.n --R.sup.2IVR.sup.1 --(CH.sub.2).sub.m --O-MG-O--(CH.sub.2).sub.m --R.sup.1VR.sup.2 --(CH.sub.2).sub.n --O-MG-O--(CH.sub.2).sub.n --R.sup.2VIin which MG is a mesogenic group, m and n are different integers from 1 to 20, and R.sup.1 and R.sup.2 are each independently ##STR21## in which a is 0 or 1 and W is H, CH.sub.3 or Cl, wherein said mesogenic compounds are obtained byc) treating a mesogenic diol of formula I,HO-MG-OH (I)with a mixture of the halides of formulae II and III,X.sup.1 --(CH.sub.2).sub.m --R.sup.a (II)X.sup.2 --(CH.sub.2).sub.n --R.sup.b (III)in the presence of a basewherein X.sup.1 and X.sup.2 are each independently Cl, Br or I,R.sup.a and R.sup.b are each independently --CH.sub.2 OH or --CH.dbd.CWHand MG, W, m and n have the meaning given, andd) treating the resulting intermediatein the case of R.sup.a and R.sup.b being --CH.sub.2 OH, with a vinyl derivative of formula CH.sub.2 .dbd.CW--(CO).sub.a --O-- or a reactive derivative thereof,in the case of R.sup.a and R.sup.b being --CH.dbd.CWH with a perbenzoic acid.