Highly Birefringent Nematic Liquid Crystals for Reflective STN Applications
摘要:
An important parameter of any LCD containing portable electronic device is a low power requirement, The reflective STN display mode offers a moderate to high information content display with low power consumption, One method to realise colour in this mode is to use a large retardation (d Deltan) value in the cell. For a cell gap of 6 mum, and a retardation of similar to1.5, a birefringence (Deltan) of greater than +0.2 is necessary. To achieve such a value in an STN LC mixture, materials with broad nematic range, good solubility and a Deltan value of < +0.25 are required.A study of the trans-cyclohexyldifluorophenyltolane core structure was made and a large number of dialkyl, alkenyl-alkyl and alkoxy materials were synthesised and characterised. These materials possess low to moderate melting points, broad purely nematic mesophases. a high Deltan and very good solubility in nematic LC hosts. They are suitable materials for inclusion in mixtures for colour reflective STN displays.
[EN] NOVEL 5 or 8-SUBSTITUTED IMIDAZO [1, 5-a] PYRIDINES AS SELECTIVE INHIBITORS OF INDOLEAMINE AND/OR TRYPTOPHANE 2, 3-DIOXYGENASES<br/>[FR] NOUVELLES IMIDAZO[1,5-A]PYRIDINES SUBSTITUÉES EN POSITION 5 OU 8 EN TANT QU'INDOLEAMINE ET/OU TRYPTOPHANE 2,3-DIOXYGÉNASES
申请人:BEIGENE LTD
公开号:WO2018054365A1
公开(公告)日:2018-03-29
Disclosed herein are 5 or 8-substituted imidazo [1, 5-a] pyridines and pharmaceutical compositions comprising at least one such 5 or 8-substituted imidazo [1, 5-a] pyridines, processes for the preparation thereof, and the use thereof in therapy. Disclosed herein are certain 5 or 8-substituted imidazo [1, 5-a] pyridines that can be useful for inhibiting indoleamine 2, 3-dioxygenase and/or tryptophane 2, 3-dioxygenase and for treating diseases or disorders mediated thereby.
Niacin Receptor Agonists, Compositions Containing Such Compounds and Methods of Treatment
申请人:Raghavan Subharekha
公开号:US20090062269A1
公开(公告)日:2009-03-05
The present invention encompasses compounds of Formula I: as well as pharmaceutically acceptable salts and hydrates thereof, that are useful for treating atherosclerosis, dyslipidemias and the like. Pharmaceutical compositions and methods of use are also included.
Electro‐Olefination—A Catalyst Free Stereoconvergent Strategy for the Functionalization of Alkenes
作者:Andreas N. Baumann、Arif Music、Jonas Dechent、Nicolas Müller、Thomas C. Jagau、Dorian Didier
DOI:10.1002/chem.202001394
日期:2020.7.8
Conventional methods carrying out C(sp2)−C(sp2) bondformations are typically mediated by transition‐metal‐based catalysts. Herein, we conceptualize a complementary avenue to access such bonds by exploiting the potential of electrochemistry in combination with organoboron chemistry. We demonstrate a transition metal catalyst‐free electrocoupling between (hetero)aryls and alkenes through readily available
Compound having 2-fluorophenyloxymethane structure
申请人:DIC CORPORATION
公开号:US09181484B2
公开(公告)日:2015-11-10
There is provided a compound having a good miscibility with another liquid crystal compound and having a combination of a low viscosity (η), high storage stability, and high T−i even after being used to produce a liquid crystal composition. In particular, it is a compound having a 2-fluorophenyloxymethane structure is provided. Since the compound having a 2-fluorophenyloxymethane structure is highly miscible with another liquid crystal compound, using the compound having a 2-fluorophenyloxymethane structure as a component of a liquid crystal composition enables a production of a liquid crystal composition which exhibits a liquid crystal phase at low viscosity and in a wide temperature range and which has a high storage stability and enables production of a liquid crystal display device which responds fast and which has excellent display characteristics.