In this paper we present selected members of 7 new series of bent-shaped five-ring resorcinol derivatives which are distinguished by substituents at the central core as well as at the outer rings. Depending on the kind and position of the substituents and depending on the length of the terminal chains not only have new mesophases (the C-PA phase or three unidentified B-2-like phases) been identified, but also interesting phase sequences have been observed (B-2-N; B-2-SmA; B-2-SmA-SmC; B-2-SmA-SmC-N).
Synthesis and evaluation of alkoxy-phenylamides and alkoxy-phenylimidazoles as potent sphingosine-1-phosphate receptor subtype-1 agonists
作者:Ghotas Evindar、Sylvie G. Bernier、Malcolm J. Kavarana、Elisabeth Doyle、Jeanine Lorusso、Michael S. Kelley、Keith Halley、Amy Hutchings、Albion D. Wright、Ashis K. Saha、Gerhard Hannig、Barry A. Morgan、William F. Westlin
DOI:10.1016/j.bmcl.2008.11.072
日期:2009.1
In the design of potent and selectivesphingosine-1-phosphatereceptoragonists, we were able to identify two series of molecules based on phenylamide and phenylimidazole analogs of FTY-720. Several designed molecules in these scaffolds have demonstrated selectivity for S1Preceptor subtype 1 versus 3 and excellent in vivo activity in mouse. Two molecules PPI-4621 (4b) and PPI-4691 (10a), demonstrated
In this paper we present selected members of 7 new series of bent-shaped five-ring resorcinol derivatives which are distinguished by substituents at the central core as well as at the outer rings. Depending on the kind and position of the substituents and depending on the length of the terminal chains not only have new mesophases (the C-PA phase or three unidentified B-2-like phases) been identified, but also interesting phase sequences have been observed (B-2-N; B-2-SmA; B-2-SmA-SmC; B-2-SmA-SmC-N).
Effects of isocyanide substituents on the mesogenic properties of halogeno(isocyanide)gold complexes: calamitic and discotic liquid crystals
作者:Silverio Coco、Pablo Espinet、José M. Martín-Alvarez、Anne-Marie Levelut
DOI:10.1039/a604258i
日期:——
The liquid crystal behaviour of linear
[AuX(CNC
6
H
4
OC
n
H
2n
+1
)] (X=halogen) complexes is tuned by systematically changing the
structure of the isocyanide ligand. The changes studied are lateral
fluorination at the 2- and 3-positions of the phenyl ring and modification
of the rod-like structure of the complexes by addition of two alkoxy
chains at themeta positions. None of the free isocyanides used
here are liquid crystals, but all the gold complexes prepared display
mesomorphic properties, except iodo(2-fluoro-4-butoxyphenyl
isocyanide)gold(i). The (2- and (3-fluorophenyl isocyanide)gold(i)
complexes show smectic A mesophases, except the 2-fluoro derivative with
n=6, which shows a nematic phase, while the
(3,4,5-trialkoxyphenyl isocyanide)gold compounds display columnar
hexagonal phases at room temperature.
通过系统地改变异氰酸配体的结构,调整了线性 [AuX(CNC 6 H 4 OC n H 2n +1 )] (X=卤素)配合物的液晶行为。所研究的变化是在苯基环的 2 位和 3 位进行横向氟化,以及通过在它们的eta 位置添加两条烷氧基链来改变配合物的杆状结构。这里使用的游离异氰酸酯都不是液晶,但除了碘(2-氟-4-丁氧基苯基异氰酸酯)金(i)之外,制备的所有金络合物都显示出介形特性。除了 n=6 的 2-氟衍生物显示出向列相外,(2-和(3-氟苯基异氰酸酯)金(i)复合物显示出 Smectic A 介相,而(3,4,5-三烷氧基苯基异氰酸酯)金化合物在室温下显示出柱状六方相。