Patent ID: 7842357

Claim:
A compound represented by the following formula (1): wherein R 1 and R 2 are independently hydrogen or alkyl having from 1 to 10 carbons, provided that in the alkyl arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH— or —C≡C—; T 1 , T 2 and T 3 are independently tetrahydropyran-2,5-diyl or tetrahydropyran-3,6-diyl; A 1 and A 2 are independently 1,4-cyclohexylene, 1,4-phenylene, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or naphthalene-2,6-diyl, provided that in these rings one of —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH—, and in the 1,4-phenylene one of —CH=may be replaced by —N═; Z 1 , Z 2 , Z 3 and Z 4 are independently a single bond or alkylene having from 1 to 4 carbons, provided that in the alkylene arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH— or —C≡C—; i is 0 or 1; j, k and m are independently 0, 1 or 2; n is 0 or 1; i+j+k+m+n is 2, 3 or 4; and i+k+n is 1, 2, 3 or 4, wherein when i is 0, j is 1 or 2; when n is 0, m is 1 or 2, and Z 4 is a single bond; when i is 1, R 1 is alkyl having from 1 to 10 carbons, provided that in the alkyl arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH— or —C≡C—; when i+k+n is 1, T 1 , T 2 and T 3 are independently tetrahydropyran-2,5-diyl; when i+j+k+m+n is 2, j, k and m are independently 0 or 1, and A 1 and A 2 are independently 1,4-cyclohexylene or decahydronaphthalene-2,6-diyl, provided that in these rings one of —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —; when i+j+k+m+n is 3, j, k and m are independently 0 or 1, and at least one of A 1 and A 2 is 1,4-cyclohexylene or decahydronaphthalene-2,6-diyl, provided that in these rings one of —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, wherein when i+j+k+m+n is 3, i+k is 0, A 1 is 1,4-cyclohexylene and A 2 is 1,4-phenylene, at least one of R 1 and R 2 is alkenyl; and when i+j+k+m+n is 4, at least two of A 1 and A 2 each is 1,4-cyclohexylene or decahydronaphthalene-2,6-diyl, provided that in these rings one of —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, wherein when i+j+k+m+n is 4, j+m is 3 and n is 1, j is 1.