Synthesis, Structure and Catalytic Activity of NHC-Ag<sup>I</sup>
Carboxylate Complexes
作者:Valerie H. L. Wong、Sai V. C. Vummaleti、Luigi Cavallo、Andrew J. P. White、Steven P. Nolan、King Kuok Mimi Hii
DOI:10.1002/chem.201601762
日期:2016.9.5
A general synthetic route was used to prepare 15 new N‐heterocyclic carbene (NHC)–AgI complexes bearing anionic carboxylate ligands [Ag(NHC)(O2CR)], including a homologous series of complexes of sterically flexible ITent ligands, which permit a systematic spectroscopic and theoretical study of the structural and electronic features of these compounds. The complexes displayed a significant ligand‐accelerated
Thermal Reaction of a Columnar Assembled Diacetylene Macrocycle
作者:Yuewen Xu、Mark D. Smith、Michael F. Geer、Perry J. Pellechia、Julius C. Brown、Arief C. Wibowo、Linda S. Shimizu
DOI:10.1021/ja9107066
日期:2010.4.21
a macrocyclic diacetylene that assembled into columns to afford porous crystals. Heating this assembly initiated a topochemical polymerization of the preorganized diacetylene units to give covalent conjugated polydiacetylenes. These stable conjugated materials maintained permanent porosity as evidenced by their type I gas adsorption isotherms with CO(2) (g). Such conjugated polymeric nanotubes could
据报道,大环丁二炔组装成柱子以提供多孔晶体。加热该组件会引发预先组织的丁二炔单元的拓扑化学聚合,从而得到共价共轭聚丁二炔。这些稳定的共轭材料保持永久孔隙率,如它们与 CO(2) (g) 的 I 型气体吸附等温线所证明的那样。这种共轭聚合物纳米管可能具有用于传感和电子学的不寻常特性。
Triazole-linked Benzylated Glucosyl, Galactosyl, and Mannosyl Monomers and Dimers as Novel Sugar Scaffold-based PTP1B Inhibitors
Monomeric and dimeric benzylated glycosyl benzenes were synthesized via copper-catalyzed [3 + 2] azide–alkyne cycloaddition. These compounds were then identified as protein tyrosine phosphatase (PTP) 1B inhibitors which displayed at least several fold selectivity over other homologous PTPases. The glucosyl, galactosyl, and mannosyl inhibitors exhibited different biological profiles, suggesting the monosaccharides may qualify as chiral scaffolds for probing the spatial preference of PTP1B. Furthermore, docking study suggested a plausible binding mode of this glycoside series with the enzymatic target.
A chiral macrocyclic receptor for sulfate anions with CD signals
作者:Runsheng Jiang、Yongjun Li、Zhihong Qin、Liang Xu、Daoben Zhu、Yuliang Li
DOI:10.1039/c3ra46049e
日期:——
A novel macrocyclic binaphthalene derivative (L) containing amide and triazole units has been synthesized by “click” reaction. The binding behaviors of this receptor toward anions have been studied by 1H NMR titration, circular dichroism (CD) spectroscopy. The tetrahedral sulfate anion predominantly interacts with L through hydrogen bonds which could tune the dihedral angle between the two naphthalene rings and supply tunable CD output signals to form chiral receptor.
我们通过 "点击 "反应合成了一种含有酰胺和三唑单元的新型大环双萘衍生物(L)。通过 1H NMR 滴定法和圆二色性(CD)光谱法研究了这种受体与阴离子的结合行为。四面体硫酸根阴离子主要通过氢键与 L 相互作用,这可以调整两个萘环之间的二面角,并提供可调的 CD 输出信号,从而形成手性受体。
Click Synthesis of Triazolyl Phenylalaninyl and Tyrosinyl Derivatives as New Protein Tyrosine Phosphatase Inhibitors
The efficient construction of triazolyl peptidomimetics via the powerful clickchemistry for the discovery of small molecule‐based chemotherapeutic agents represents a promising strategy in drug development today. Herein, the synthesis of novel mono‐triazolyl or bis‐triazolyl amino acid derivatives was rapidly achieved via microwave‐assisted Cu(I)‐catalyzed azide‐alkyne 1,3‐dipolar cycloaddition (CuAAC)