strategy), or by condensation of an amide enolate with diethylchlorophosphate (second strategy). Acidic hydrolysis of () or () gives α-amidophosphonate () alkylated or not in the α -position. () and () react with aromatic or aliphatic aldehydes to produce α,β-unsatured secondary or tertiary amides ().
Highly enantioselective catalytic asymmetric epoxidation of α,β-unsaturatedcarboxylic acid imidazolides and simple amides was developed. In the presence of 5–10 mol% of lanthanide–BINOL complexes, the reaction proceeded smoothly with high substrate generality. In particular, in the cases of α,β-unsaturated amides, there was nearly perfect enantioselectivity (>99% ee). The corresponding epoxides were
The present invention relates to materials used for aligning liquid crystals of liquid crystal display elements and to a polymer for use in liquid crystal vertical alignment layer used in producing a liquid crystal vertical alignment layer.
The polymer for use in a liquid crystal vertical alignment layer includes (a) a moiety that is photochemically isomerizable but not photochemically crosslinked, (b) a moiety that is photochemically crosslinkable, and (c) a moiety that stabilizes a vertical alignment. The polymer can be used to produce a vertical alignment layer that has a liquid crystal alignment property enabling control of alignment at a low UV dose and that offers a large pretilt angle and superior optical stability.
Compound, cured product, polymer, photo-alignment film, optically anisotropic body and liquid crystal display element
申请人:DIC Corporation
公开号:US10738242B2
公开(公告)日:2020-08-11
A compound and a polymer which can each form a photo-alignment film having excellent ability of controlling alignment, a photo-alignment film obtained using the polymer and an optically anisotropic body and a liquid crystal display element each having the photo-alignment film are provided. A compound represented by the general formula (1). In the formula, P represents a polymerizable group, Z and Z1 represent divalent linking groups, A and A1 represent divalent cyclic groups, and X1 to X5 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a hydroxy group, a nitro group, a cyano group or an alkyl group having 1 to 40 carbon atoms which may have a substituent, provided that X1, X2, X4 and X5 are not simultaneously hydrogen atoms.