107864-71-1Relevant articles and documents
A new selective turn-on fluorogenic dipodal-cobalt(II) ensemble probe for nitrite ion detection and live cell imaging
Mahapatra, Ajit Kumar,Hazra, Giridhari,Mukhopadhyay, Subhra Kanti,Mukhopadhyay, Anindita Roy
, p. 1164 - 1168 (2013)
A new dipodal-triazole-Co2+-ensemble with a ligand containing quinoline moiety was designed and synthesized as a highly sensitive fluorescent sensor for nitrite in aqueous media. Based on in situ-formed Co2+-DTQ (Co2+ chelated dipodal of triazole-quinoline) ensembles having the specific binding affinity for nitrite anions over other anions, this sensory system allows rapid recognition and quantitative detection of nitrite in neutral aqueous media in an 'off-on' fashion. To confirm the suitability of DTQ for biological applications, we also employed it for the fluorescence detection of the changes of intracellular NO2- in three different species of cultured cells in the presence of nitrite ions.
Synthesis of benzene-centered trinuclear phthalocyanines by triple-click chemistry
Das, Banibrata,Umeda, Masashi,Tokunaga, Etsuko,Toru, Takeshi,Shibata, Norio
, p. 337 - 339 (2010)
We disclose here the synthesis of novel benzene-centered trifluoroethoxy-coated trinuclear Pc 1 and its nonfluorinated analog 2 with flexible click spacers. UV-vis study reveals that trifluoroethoxy coating can result in the purely nonaggregated, windmill
Synthesis, spectroscopic and theoretical studies of new quasi-podands from bile acid derivatives linked by 1,2,3-triazole rings
Pospieszny, Tomasz,Koenig, Hanna,Kowalczyk, Iwona,Brycki, Bogumil
, p. 2557 - 2570 (2014)
A novel method for the synthesis of bile acid derivatives has been developed using "click chemistry". Intermolecular 1,3-dipolar cycloaddition of the propargyl ester of bile acids and azide groups of 1,3,5-tris(azidomethyl)benzene gave a new quasi-podands
Rationally designed cooperatively enhanced receptors to magnify host-guest binding in water
Gunasekara, Roshan W.,Zhao, Yan
, p. 843 - 849 (2015)
When disengaged interactions within a receptor are turned on by its guest, these intrahost interactions will contribute to the overall binding energy. Although such receptors are common in biology, their synthetic mimics are rare and difficult to design. By engineering conflictory requirements between intrareceptor electrostatic and hydrophobic interactions, we enabled complementary guests to eliminate the "electrostatic frustration" within the host and turn on the intrahost interactions. The result was a binding constant of Ka >105 M-1 from ammonium-carboxylate salt bridges that typically function poorly in water. These cooperatively enhanced receptors displayed excellent selectivity in binding, despite a large degree of conformational flexibility in the structure.
Formation of Supramolecular Polymers from Porphyrin Tripods
Lee, Hosoowi,Lee, Dajung,Kim, Inhye,Lee, Eunji,Jang, Woo-Dong
, p. 8060 - 8067 (2020)
A porphyrin tripod (PZnT) composed of three zinc porphyrin wings connected via triazole bridges was prepared as a monomeric building block for a supramolecular polymer. PZnT formed long fibrous supramolecular polymers with a diameter of 7 nm through the axial coordination of triazole nitrogen atoms to zinc porphyrins. The molecular packing structure of a PZnT-based supramolecular polymer was assigned as a hexagonal columnar phase. PZnT formed a stable 1:1 host-guest complex with 1,3,5-tris(4-pyridyl)benzene (Py3B) through axial coordination of pyridyl groups to zinc porphyrins. The host-guest complex between PZnT and Py3B adopts a cone-shaped geometry. After the addition of Py3B, the host-guest complex exhibited a characteristic X-ray diffraction pattern of rectangular columnar ordering. Furthermore, the formation of supercoiled helical fibrous assemblies was observed by transmission electron microscopy (TEM).
Electron-Equivalent Valency through Molecularly Well-Defined Multivalent DNA
Cheng, Ho Fung,Wang, Shunzhi,Mirkin, Chad A.
supporting information, p. 1752 - 1757 (2021/02/06)
Oligonucleotide-functionalized nanoparticles (NPs), also known as "programmable atom equivalents"(PAEs), have emerged as a class of versatile building blocks for generating colloidal crystals with tailorable structures and properties. Recent studies have shown that, at small size and low DNA grafting density, PAEs can also behave as "electron equivalents"(EEs), roaming through and stabilizing a complementary PAE sublattice. However, it has been challenging to obtain a detailed understanding of EE-PAE interactions and the underlying colloidal metallicity because there is inherent polydispersity in the number of DNA strands on the surfaces of these NPs; thus, the structural uniformity and tailorability of NP-based EEs are somewhat limited. Herein, we report a strategy for synthesizing colloidal crystals where the EEs are templated by small molecules, instead of NPs, and functionalized with a precise number of DNA strands. When these molecularly precise EEs are assembled with complementary NP-based PAEs, X-ray scattering and electron microscopy reveal the formation of three distinct "metallic"phases. Importantly, we show that the thermal stability of these crystals is dependent on the number of sticky ends per EE, while lattice symmetry is controlled by the number and orientation of EE sticky ends on the PAEs. Taken together, this work introduces the notion that, unlike conventional electrons, EEs that are molecular in origin can have a defined valency that can be used to influence and guide specific phase formation.
Design and Synthesis of Oleanolic Acid Trimers to Enhance Inhibition of Influenza Virus Entry
Huang, Boxuan,Li, Weijia,Mu, Yu,Shao, Liang,Su, Yangqing,Sun, Mengsi,Xu, Huan,Yang, Fan,Yu, Fei,Zhang, Jihong,Zhang, Yuan
, p. 1759 - 1765 (2021/11/18)
Influenza is a major threat to millions of people worldwide. Entry inhibitors are of particular interest for the development of novel therapeutic strategies for influenza. We have previously discovered oleanolic acid (OA) to be a mild influenza hemagglutinin (HA) inhibitor. In this work, inspired by the 3D structure of HA as a homotrimeric receptor, we designed and synthesized 15 OA trimers with different linkers and central region via the copper-catalyzed azide-alkyne cycloaddition reaction. All of the OA trimers were evaluated for their antiviral activities in vitro, and 12c, 12e, 13c, and 13d were observed to exhibit robust potency (IC50 in the submicromolar range) against influenza A/WSN/33 (H1N1) virus that was stronger than that observed with oseltamivir. In addition, these compounds also displayed strong biological activity against A/Hong Kong/4801/2014 and B/Sichuan/531/2018 (BV). The results of hemagglutination inhibition assays and surface plasmon resonance binding assays suggest that these OA trimers may interrupt the interaction between the HA protein of influenza virus and the host cell sialic acid receptor, thus blocking viral entry. These findings highlight the utility of multivalent OA conjugates to enhance the ligand-target interactions in anti-influenza virus drug design and are also helpful for studying antiviral drugs derived from natural products.
An Autonomous Chemical Robot Discovers the Rules of Inorganic Coordination Chemistry without Prior Knowledge
Bell, Nicola L.,Cronin, Leroy,Henson, Alon,Kowalski, Daniel J.,Long, De-Liang,Porwol, Luzian
supporting information, p. 11256 - 11261 (2020/05/26)
We present a chemical discovery robot for the efficient and reliable discovery of supramolecular architectures through the exploration of a huge reaction space exceeding ten billion combinations. The system was designed to search for areas of reactivity f
COMPOUNDS, PHARMACEUTICAL COMPOSITIONS AND USE THEREOF AS INHIBITORS OF RAN GTPASE
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Paragraph 0095; 00116, (2019/04/09)
Compounds of general formula IA, IB and IC outlined below, including pharmaceutically acceptable salts, solvates and hydrates thereof. Such compounds and pharmaceutical compositions comprising them may be used in medical conditions involving Ran GTPase.
Synthesis and anticancer activity of bile acid dendrimers with triazole as bridging unit through click chemistry
Anandkumar, Devaraj,Rajakumar, Perumal
, p. 37 - 46 (2017/08/01)
Triazole-based novel dendrimers with bile acid surface groups have been synthesized through click chemistry by divergent approach and characterized by spectral data. All the dendrimers exhibit excellent anticancer activity. Higher-generation dendrimers exhibit better anticancer activity than the lower-generation dendrimers.