Patent ID: 7838087

Claim:
A compound represented by Formula (1) or Formula (2): in which Ra and Rb each independently is hydrogen or alkyl of 1 to 20 carbon atoms; in the alkyl, arbitrary —CH 2 — may be replaced by —O—, or —CO—, arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH—, and arbitrary hydrogen may be replaced by halogen; A 1 , A 11 , A 12 , A 2 , A 21 and A 22 each independently is 1,4-cyclohexylene, 1,4-phenylene, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, or naphthale-2,6-diyl; in the rings, one or not-adjacent two —CH 2 — may be replaced by —O—, and arbitrary hydrogen may be replaced by halogen; Y is a single bond, —(CH 2 ) 2 —; —CH═CH—, —CF═CF—, —(CH 2 ) 4 —, —CH═CH—(CH 2 ) 2 —, or —(CH 2 ) 2 —CH═CH—; W is —CH═CH—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —(CH 2 ) 4 —, —(CH 2 ) 3 —O —, —O —(CH 2 ) 3 —, —(CH 2 ) 2 CF 2 O—, or —OCF 2 (CH 2 ) 2 —; Z 11 , Z 12 , Z 2 , Z 21 and Z 22 each independently is a single bond, —(CH 2 ) 2 —, —COO—, —OCO—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —CH═CH—, —CF═CF—, —(CH 2 ) 4 —, —(CH 2 ) 3 —O—, —O—(CH 2 ) 3 —, —CH═CH—(CH 2 ) 2 —, —(CH 2 ) 2 —CH═CH—, —(CH 2 ) 2 CF 2 O—, or —OCF 2 (CH 2 ) 2 —; j, k, m, n, p and q each independently is 0 or 1, and the sum of them is 1, 2 or 3; each of j and k is 0 when m is 0, Ra in Formula (1) is none of hydrogen, alkoxy and alkoxymethyl when m is 0, and Ra in Formula (2) is 1-alkenyl when m is 0.