The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, containing these metal complexes.
本发明涉及金属配合物和电子器件,特别是包含这些金属配合物的有机电致发光器件。
FACILE SYNTHESIS OF A SERIES OF LIQUID CRYSTALLINE 2-(4'-ALKOXYPHENYL)-5-CYANOPYRIDINES
申请人:Chia Win-Long
公开号:US20080306276A1
公开(公告)日:2008-12-11
The invention relates to a facile synthesis of a series of 2-(4′-alkoxyphenyl)-5-cyanopyridine liquid crystal compounds which are represented by the following formula (I):
wherein C
n
H
2n+1
is a linear alkyl group having 2-12 carbon atoms. The synthesis of the liquid crystalline 2-(4′-alkoxyphenyl)-5-cyanopyridine is completed in a two-step reaction. First, a Grignard reagent (such as 4-alkoxyphenylmagnesium bromide) is added to a 3-cyanopyridinium salt (such as N-phenyloxycarbonyl-3-cyanopyridinium chloride) to get a 1,2-dihydropyridine. Then, the 1,2-dihydropyridine is oxidized with o-chloronil to obtain the 2-(4′-alkoxyphenyl)-5-cyanopyridine.
A selective synthesis of unsymmetrically substituted electron donor/electron acceptor biaryls is described which is based on an electrochemically or photochemically induced SRN1 reaction; the optical hyperpolarizability coefficients β are determined in solution for the various reaction products and found to be of the same order of magnitude as that of 4-nitro-aniline.
The present application relates to a novel liquid crystal compound and a use thereof. The novel liquid crystal compounds of the present application can exhibit a smectic A phase over a wide temperature range. The novel liquid crystal compounds of the present application can be usefully used in the technical fields to which smectic A liquid crystals can be applied, for example, bistable devices.
Provided is a compound having an AMPA receptor function enhancing action, and useful as a prophylactic or therapeutic drug for depression, Alzheimer's disease, schizophrenia, attention deficit hyperactivity disorder (ADHD) and the like. A compound represented by the formula (I):
wherein each symbol is as defined in the present specification,
or a salt thereof.