127751-08-0Relevant articles and documents
Star polymers by photoinduced copper-catalyzed azide-alkyne cycloaddition click chemistry
Tinmaz, Hatice Busra,Arslan, Irem,Tasdelen, Mehmet Atilla
, p. 1687 - 1695 (2015)
Well-defined star polymers consisting of tri-, tetra-, or octa-arms have been prepared via coupling-onto strategy using photoinduced copper(I)-catalyzed 1,3-dipolar cycloaddition click reaction. An azide end-functionalized polystyrene and poly(methyl meth
Multimeric xanthates as carbonic anhydrase inhibitors
Abellán-Flos, Marta,Tan?, Muhammet,Supuran, Claudiu T.,Vincent, Stéphane P.
, p. 946 - 952 (2016)
The field of multivalent inhibition of enzymes is growing exponentially from the first reported multivalent effect on a glycosidase enzyme. However, the investigations have generally remained restricted to carbohydrate-processing enzymes. Carbonic anhydrases are ubiquitous metallo-enzymes involved in many key biological processes, that catalyze the reversible hydration/dehydration of CO2/HCO3. This study reports the first synthesis of multimeric xanthates addressing the selectivity and potency of CA multivalent inhibition. Six multivalent compounds containing three, four, and six xanthate moieties were prepared and assayed against four relevant CA isoforms together with their monovalent analogues. Some of the multimers were stronger inhibitors than the monomeric species. For hCA I, the two best molecules 18 and 20 showed an improvement of the ligand affinity of 4.8 and 2.3 per xanthate units (valence-corrected values), respectively, which corresponds to a clear multivalent effect. Moreover, the biochemical assays demonstrated that the multimeric presentation of xanthates, also affected the selectivity of the relative inhibition among the four CAs assayed.
Sliding-graft interpenetrating polymer networks from simultaneous "Click Chemistry" and atom transfer radical polymerization
Yao, Fang,Xu, Li Qun,Fu, Guo-Dong,Lin, Bao Ping
, p. 9761 - 9770 (2010)
In this work, a kind of semi-interpenetrating polymer network (s-IPN) with unique molecular structures, poly(ethylene glycol) (PEG) network with movable sliding-grafted poly(2-hydroxyethyl methacrylate) (PHEMA) (sIPN-PEG/α -CD-sg- PHEMA), were first reported. sIPN-PEG/α -CD-sg-PHEMAs were prepared by simultaneous "click chemistry" and atom transfer radical polymerization (ATRP) of a mixture of poly(ethylene glycol)-diazide/ bromobutyryloxy R-cyclodextrin inclusion complex (N3-PEGN3/( R-CD-BIBB)m), tetrakis(2-propynyloxymethyl) methane (TMOP), CuBr, pentamethyldiethylenetriamine (PMDETA), HEMA and DMF. Attributable to the controlled characters of ATRP and the quantitative yields of "click chemistry", the prepared sIPN-PEG/α -CD-sg-PHEMAs have the well-defined PEG networks, as well as uniform and tunable sliding-grafted PHEMA chains. The length of sliding-grafted PHEMA of the sIPN-PEG/α -CD-sg-PHEMA can be regulated by changing polymerization times. The molecular structures, and physical and thermal properties of the sIPN-PEG/α -CD-sg-PHEMA were studied by FTIR, 1HNMR, XPS, TGA, and DSC measurements. The sIPN-PEG/α -CD-sg-PHEMAs exhibit good physical and mechanical properties. Most important, comparing to classical semi-IPN, the diffusion of interpenetrated PHEMA from sIPN-PEG/α -CD-sg-PHEMA was largely prevented for a long time solvent immersion because the PHEMA brushes were fixed on PEG networks. The sliding-grafted PHEMA chains afford functionalities to the bulk and surface of s-IPN-PEG and could potentially be used as carriers of genes and drugs.
Well-defined biodegradable amphiphilic conetworks
Yuan, Yang,Zhang, Ao-Kai,Ling, Jun,Yin, Li-Hong,Chen, Yue,Fu, Guo-Dong
, p. 6309 - 6318 (2013)
A series of amphiphilic conetworks (APCNs) with well-defined molecular structures were prepared via a copper-catalyzed 1,3-dipolar azide-alkyne cycloaddition (CuAAC) of tetrakis(2-propynyloxymethyl)methane (TMOP), diazide end-functionalized triblock copolymers of poly(ε-caprolactone) with poly(ethylene glycol) (N3-PCL-PEG-PCL-N3). The so-prepared APCNs exhibit unique properties of ordered nanophase separation of hydrophilic (HI) and hydrophobic (HO) phases, and a variable swelling capacity both in water and organic solvent. The morphology, surface properties and thermal behavior of the APCNs were investigated by scanning electron microscopy (SEM), water contact angle (WCA), and differential scanning calorimetry (DSC), respectively. The physical properties of APCNs depended on the ratio of HI-HO, which can be regulated via precise synthesis of N3-PCL-PEG-PCL-N3. The analysis of an in vitro cell viability assay suggests that the APCNs have excellent biocompatibility. The prepared APCNs are excellent carriers for controlled drug release. The hydrophilic choline theophyllinate and hydrophobic 5-fluorouracil (5-FU) were loaded into the APCNs simultaneously as model drugs to study the release from APCNs. The well-controlled drug release is attributable to the well-defined molecular structure and tunable HI/HO composition of the APCNs.
A water-soluble AIE-active polyvalent glycocluster: Design, synthesis and studies on carbohydrate-lectin interactions for visualization of Siglec distributions in living cell membranes
Liu, Guang-Jian,Zhang, Yuan,Zhou, Lingyun,Jia, Li-Yan,Jiang, Guohua,Xing, Guo-Wen,Wang, Shu
, p. 9868 - 9872 (2019)
In this work, we designed and synthesized an aggregation-induced emission (AIE)-active tetraphenylethene-decorated pseudo-trisialic acid (TPE3S) and validated its high affinity for Siglecs using microscale thermophoresis techniques. TPE3S was a unique binding-on fluorescent trivalent sialocluster which was successfully utilized for the visualization of Siglecs expressed on the surface of mammalian cells.
Figure-Eight-Shaped and Cage-Shaped Cyclic Polystyrenes
Lee, Taeheon,Oh, Joongsuk,Jeong, Jonghwa,Jung, Haeji,Huh, June,Chang, Taihyun,Paik, Hyun-Jong
, p. 3672 - 3680 (2016)
Nonlinear polystyrenes (PS) with similar molecular weights but with different molecular structures having star-, figure-8-, and cage-shaped architectures were synthesized by combining atom transfer radical polymerization (ATRP) and click chemistry. Figure-8- and cage-shaped PS were fractionated by using a gradient normal phase liquid chromatography as confirmed by SEC-LS, MALDI-TOF MS, 1H NMR, and FT-IR spectrometry. Their purities were estimated by using a two-dimensional liquid chromatography (2D-LC). The glass transition temperatures of these topologically different polymers were in the order of cage-, figure-8-, and star-shaped polymers possibly due to the multiple links that constrain the overall molecular diffusivity in the case of multicyclic polymers (figure-8, and cage). Monte Carlo simulation on the glass transition behavior of model system also agreed well with the experimental results.
Telodendrimer-Based Macromolecular Drug Design using 1,3-Dipolar Cycloaddition for Applications in Biology
Bazgir, Ayoob,Kakkar, Ashok,Kaul, Esha,Maysinger, Dusica,Yazdani, Hossein
, (2020)
An architectural polymer containing hydrophobic isoxazole-based dendron and hydrophilic polyethylene glycol linear tail is prepared by a combination of the robust ZnCl2 catalyzed alkyne-nitrile oxide 1,3-dipolar cycloaddition and esterification chemistry. This water soluble amphiphilic telodendrimer acts as a macromolecular biologically active agent and shows concentration dependent reduction of glioblastoma (U251) cell survival.
Synthesis and encapsulation of an amphiphilic thermoresponsive star polymer with β-cyclodextrin and hyperbranched poly(oligo(ethylene glycol)methacrylate) as building blocks
Li, Yinwen,Guo, Huilong,Zheng, Jian,Gan, Jianqun,Zhang, Yan,Guan, Xiaoxiao,Wu, Kun,Lu, Mangeng
, p. 54268 - 54281 (2014)
Novel macromolecular star polymers with triazole and cyclodextrin (CD) segments as branch points and poly(oligo(ethylene glycol)methacrylate) (POEGMAs) as dense hydrophilic branches were synthesized via a combination of azide-alkyne click chemistry and at
Cluster glycosides and heteroglycoclusters presented in alternative arrangements
Figueredo, Andreza S.,Zamoner, Luis O.B.,Rejzek, Martin,Field, Robert A.,Carvalho, Ivone
, p. 4405 - 4409 (2018)
Multivalent carbohydrates, or glycoclusters, are useful tools to study glycan-lectin and glycan-enzyme recognition processes and have wide potential therapeutic applicability. Herein, we report the synthesis of novel glycoclusters presenting glucopyranose
Interpenetrating network hydrogels via simultaneous "click Chemistry" and atom transfer radical polymerization
Xu,Yao,Fu,Kang
, p. 1810 - 1817 (2010)
Simultaneous interpenetrating polymer networks (sIPNs) from concurrent copper(I)-catalyzed azide-alkyne cycloaddition "click chemistry" and atom transfer radical polymerization (ATRP) are described. Semi-sIPN of poly(ethylene glycol)/poly(2-hydroxyethyl methacrylate) (semi-PEG/PHEMA-sIPN) was first prepared via simultaneous "click chemistry" and ATRP from a mixture of poly(ethylene glycol)-diazide (N3-PEG-N3, Mn = 4000 g/mol), tetrakis(2-propynyloxymethyl)methane (TPOM), ethyl-2-bromobutyrate (EBB), CuBr, pentamethyldiethylenetriamine (PMDETA), and 2-hydroxyethyl methacrylate (HEMA) in dimethylformamide (DMF). Full sIPN of PEG/PHEMA (full-PEG/PHEMA-sIPN) was then prepared via simultaneous "click chemistry" and ATRP from a mixture of N3-PEG-N3 (Mn = 4000 g/mol), TPOM, EBB, CuBr, PMDETA, HEMA, and poly(ethylene glycol) diacrylate) (PEGDA, Mn = 575) in DMF. Both the semi- and full-sIPNs exhibit a fast gelation rate and high gel yield. The sIPNs also exhibit high swelling ratios and good mechanical and antifouling properties. The morphology and thermal behavior of the sIPNs were studied by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). These sIPNs could find applications as biomaterials for contact lenses, biomedical materials, artificial organs, and drug delivery systems.