T 形多亲三嵌段分子,由棒状对三联苯单元、以 1-acylamino-1-deoxy-D-山梨糖醇单元封端的亲水且柔性的侧向连接的低聚(氧乙烯)链和两个末端连接的亲脂烷基组成链,已通过钯催化的交叉偶联反应合成为关键步骤。通过偏光显微镜、差示扫描量热法 (DSC) 和 X 射线散射研究了这些化合物的热致液晶行为。我们研究了自组织模式作为横向极性链的长度和位置以及末端烷基链的长度的函数。根据极性和亲脂性片段的大小,检测到一系列不寻常的液晶相。在这三个阶段中,空间被划分为三个不同的周期性子空间。除了由极性柱穿透的层组成的六边形通道层相(ChL(hex))外,还有由方形(Col(squ)/p4mm)或五边形圆柱体(Col(方)/p4gm)。圆柱壁由由烷基链柱稠合的三联苯单元组成,内部包含极性侧链。此外,观察到六方柱状相,其中极性柱在三联苯和烷基链的连续体中组织,三联苯核在柱周围切向组织,长轴垂直于
Supramolecular dendrimers: Unusual mesophases of ionic liquid crystals derived from protonation of DAB dendrimers with facial amphiphilic carboxylic acids
作者:Andrew G. Cook、Ute Baumeister、Carsten Tschierske
DOI:10.1039/b415892j
日期:——
Supramolecular liquid crystalline (LC) dendrimers were prepared by self-assembly of first to fifth generation amino terminated DAB dendrimers with facial amphiphilic carboxylic acids. These carboxylic acids are composed of three distinct incompatible segments, a rigid rod-like terphenyl core, two terminal alkyl chains and a polar lateral carboxylate group. The COOH groups were either directly connected to the terphenyl core or via oligo(oxyethylene) chains of different lengths. Depending upon the length of the polyether chain used, the dendrimer generation, the ratio of dendrimer to carboxylic acid or the temperature, a series of six different LC phases were observed. As well as a smectic phase (SmA), two different square columnar phases (Colsqu), a mesophase combining a layer structure with a hexagonal organisation of columns (channelled layer phase, ChLhex) and two additional mesophases (Colhex and M) with unknown structures were found. The square columnar phases are either composed of square cylinders (plane group p4mm) or a regular arrangement of square and triangular cylinders (plane group p4gm). In these dendrimer–carboxylic acid complexes protons are transferred from the COOH groups to the amino groups of the dendrimer, which gives rise to ionic complexes (dendroelectrolyte–amphiphile complexes). This concept allows the tailoring of the mesomorphic properties in a thermodynamically controlled self assembly process. The T-shaped ternary amphiphilic structure of the acid components and the incompatibility of the ionic species formed during the self assembly process are responsible for the formation of unconventional mesophase structures.
Synthesis of Multivalent Carbohydrate-Centered Glycoclusters as Nanomolar Ligands of the Bacterial Lectin LecA from <i>Pseudomonas aeruginosa</i>
作者:Marina L. Gening、Denis V. Titov、Samy Cecioni、Aymeric Audfray、Alexey G. Gerbst、Yury E. Tsvetkov、Vadim B. Krylov、Anne Imberty、Nikolay E. Nifantiev、Sébastien Vidal
DOI:10.1002/chem.201300135
日期:2013.7.8
the bacteriallectinLecA with various valencies (from 2 to 4) and linkers. Evaluation of their binding properties towards LecA has been performed by a combination of hemagglutination inhibition assays (HIA), enzyme‐linked lectin assays (ELLA), and isothermal titration microcalorimetry (ITC). Divalentligands displayed dissociation constants in the sub‐micromolar range and tetravalent ligands displayed
[EN] COMPOUNDS FOR TARGETING MUTANT HUNTINGTIN PROTEIN AND USES THEREOF<br/>[FR] COMPOSÉS POUR LE CIBLAGE DE LA PROTÉINE HUNTINGTINE MUTANTE ET LEURS UTILISATIONS
申请人:CHDI FOUNDATION INC
公开号:WO2020176424A1
公开(公告)日:2020-09-03
The present disclosure relates generally to compounds that simultaneously bind both mutant huntingtin protein (mHTT) and an ubiquitin E3 ligase and their use as therapeutic agents, for example, in treating diseases, such as neurodegenerative disorders caused by aggregation of mHTT.
due to terminal rings with extreme characteristics within heteroaromatic systems, and the nature of the linkers, had a dominant influence upon their physico-chemical properties in solution. Their structural features enhanced non-covalent interactions inducing coiled conformations.
Compounds for targeting mutant huntingtin protein and uses thereof
申请人:CHDI Foundation, Inc.
公开号:US11389438B2
公开(公告)日:2022-07-19
The present disclosure relates generally to compounds that simultaneously bind both mutant huntingtin protein (mHTT) and an ubiquitin E3 ligase and their use as therapeutic agents, for example, in treating diseases, such as neurodegenerative disorders caused by aggregation of mHTT.