Hall, A. W.; Lacey, D.; Holmes, D., Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals, 1994, vol. 250, p. 333 - 346
A synthetic strategy toward branched oligomesogenic phosphonic acids: comparison of alternative pathways
作者:Maksym F. Prodanov、Olga V. Vashchenko、Valerii V. Vashchenko
DOI:10.1016/j.tetlet.2013.11.022
日期:2014.1
This work is devoted to the elaboration of a practical scheme for the synthesis of dendritic derivatives of gallic acid containing a carboxylate-ω-alkylphosphonic acid group and three terminal promesogenic substituents. Two synthetic strategies toward the target compounds were examined that differ in the sequence of the introduction of the promesogenic units and ω-alkylphosphonic group.
Direct transition from a nematic phase to a polar biaxial smectic A phase in a homologous series of unsymmetrically substituted bent-core compoundsElectronic supplementary information (ESI) available: physical and spectral data obtained for the compounds of series 1j, 1k and 1l. See http://www.rsc.org/suppdata/jm/b3/b309262c/
作者:R. Amaranatha Reddy、B. K. Sadashiva
DOI:10.1039/b309262c
日期:——
The synthesis and characterization of twenty seven new compounds belonging to three homologous series of compounds derived from 3-hydroxybenzoic acid are reported. One of the terminal positions of the constituent molecules of these compounds is substituted with a strongly polar cyano group while the other end contains an n-alkyl chain attached to a biphenyl moiety. Twenty two of these compounds show the polar partial bilayer biaxial smectic A phase which is antiferroelectric in nature. In addition, a direct transition from the nematic phase to the polar partial bilayer biaxial smectic A phase which has not been seen before is also reported. The mesophases have been characterized using polarized light optical microscopy, differential scanning calorimetry, X-ray diffraction studies and electro-optical experiments.
报告中介绍了属于 3-hydroxybenzoic acid 衍生的三个同源化合物系列的 27 种新化合物的合成和特性。这些化合物组成分子的一个末端位置被一个强极性氰基取代,而另一端则含有一个连接到联苯分子上的正烷基链。这些化合物中有 22 种显示出极性部分双层双轴平滑 A 相,其性质为反铁电性。此外,还报道了从向列相直接过渡到极性部分双双轴 Smectic A 相的情况,这是以前从未见过的。利用偏振光光学显微镜、差示扫描量热法、X 射线衍射研究和电光实验对这些介相进行了表征。
Liquid crystal compounds
申请人:Showa Shell Sekiyu Kabushiki Kaisha
公开号:US05184847A1
公开(公告)日:1993-02-09
Ferrelectric chiral smetic liquid crystal compound are provided which have the formula, for example ##STR1## wherein R is a C.sub.1-20 alkyl group.
BRIDGED LIPOGLYCOPEPTIDES THAT POTENTIATE THE ACTIVITY OF BETA-LACTAM ANTIBACTERIALS
申请人:Gallant Michel
公开号:US20130244929A1
公开(公告)日:2013-09-19
The present invention provides novel lipoglycopeptide compounds which are Type 1 signal peptidase inhibitors (SpsB). Compounds of the present invention are useful for the treatment of various bacterial related infectious diseases, particularly when used as a potentiator of a β-lactam antibiotic such as imipenem and ertapenem. Accordingly, the present invention provides a method for the treatment of bacterial related infections using the compounds described herein, either alone or in combination with a β-lactam antibiotic.
COMPOUNDS WITH ACTIVITY AT RETINOIC ACID RECEPTORS
申请人:Olsson Roger
公开号:US20090176837A1
公开(公告)日:2009-07-09
Disclosed herein are novel compounds with activity at RARβ 2 receptors. Further disclosed are the use of such compounds for treatment of or to alleviate symptoms of cancer, neurological disorders such as memory deficits and schizophrenia, neurodegenerative disorders such as Parkinson's and Alzheimer's diseases, inflammatory disorders such as psoriasis and rheumatoid arthritis, eye disorders and depression.