Provided is a method for producing a polymerizable compound represented by a formula (I) comprising:

a step (1) that reacts a compound represented by a formula (II) with 2,5-dihydroxybenzaldehyde in an organic solvent in the presence of a base to obtain a reaction mixture including a compound represented by a formula (III); and a step (2) that adds a compound represented by a formula (IV) and an acidic aqueous solution to the reaction mixture obtained by the step (1) to effect a reaction, wherein A represents a hydrogen atom, a methyl group or the like, L represents a leaving group, n represents an integer from 1 to 20, X represents an oxygen atom, a sulfur atom, C(R.sup.1)(R.sup.2) or the like, R represents a hydrogen atom, an organic group or the like, and each of R.sup.X represents a hydrogen atom, a halogen atom or the like. According to the present invention, provided is a method for producing a polymerizable compound represented by a formula (I) at high purity and at high yield.

##STR00001##

Provided is a method for producing a polymerizable compound represented by a formula (I) comprising:

a step (1) that reacts a compound represented by a formula (II) with 2,5-dihydroxybenzaldehyde in an organic solvent in the presence of a base to obtain a reaction mixture including a compound represented by a formula (III); and a step (2) that adds a compound represented by a formula (IV) and an acidic aqueous solution to the reaction mixture obtained by the step (1) to effect a reaction, wherein A represents a hydrogen atom, a methyl group or the like, L represents a leaving group, n represents an integer from 1 to 20, X represents an oxygen atom, a sulfur atom, C(R.sup.1)(R.sup.2) or the like, R represents a hydrogen atom, an organic group or the like, and each of R.sup.X represents a hydrogen atom, a halogen atom or the like. According to the present invention, provided is a method for producing a polymerizable compound represented by a formula (I) at high purity and at high yield.

##STR00001##

The present invention relates to a novel method for the preparation of photoaligning polymer materials comprising aryl acrylic acid ester groups, to photoalignment compositions obtained by this process, to the use of the composition as orienting layer for liquid crystals and to non-structured and structured optical elements, electro-optical elements, multi-layer systems or in nanoelectronics comprising the compositions.

The present invention relates to a novel method for the preparation of photoaligning polymer materials comprising aryl acrylic acid ester groups, to photoalignment compositions obtained by this process, to the use of the composition as orienting layer for liquid crystals and to non-structured and structured optical elements, electro-optical elements, multi-layer systems or in nanoelectronics comprising the compositions.

The present invention relates to a novel method for the preparation of photoaligning polymer materials comprising aryl acrylic acid ester groups, to photoalignment compositions obtained by this process, to the use of the composition as orienting layer for liquid crystals and to non-structured and structured optical elements, electro-optical elements, multi-layer systems or in nanoelectronics comprising the compositions.

The present invention relates to a novel method for the preparation of photoaligning polymer materials comprising aryl acrylic acid ester groups, to photoalignment compositions obtained by this process, to the use of the composition as orienting layer for liquid crystals and to non-structured and structured optical elements, electro-optical elements, multi-layer systems or in nanoelectronics comprising the compositions.

A compound of formula (1):

##STR00001##

wherein, A.sup.1 and A.sup.2 are a polymerizable group; n1 and n2 are an integer of 1 to 3; L.sup.1 is a single bond or an optionally branched (n1+1)-valent linking group; L.sup.2 is a single bond or an optionally branched (n2+1)-valent linking group; X is a single bond, a divalent organic group having 1 to 20 carbons, a sulfonyl group, or a divalent oxygen atom or sulfur atom; R.sup.1 and R.sup.2 are a fused aromatic ring group optionally having a substituent; and m1 and m2 are an integer of 2 to 4.

A compound of formula (1):

##STR00001##

wherein, A.sup.1 and A.sup.2 are a polymerizable group; n1 and n2 are an integer of 1 to 3; L.sup.1 is a single bond or an optionally branched (n1+1)-valent linking group; L.sup.2 is a single bond or an optionally branched (n2+1)-valent linking group; X is a single bond, a divalent organic group having 1 to 20 carbons, a sulfonyl group, or a divalent oxygen atom or sulfur atom; R.sup.1 and R.sup.2 are a fused aromatic ring group optionally having a substituent; and m1 and m2 are an integer of 2 to 4.