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Showing 1-30 of 76 results for "B17905" within Papers
Amandine L Flourat et al.
Frontiers in chemistry, 7, 842-842 (2020-01-11)
To investigate lignin degradation, scientists commonly use model compounds. Unfortunately, these models are most of the time simple β-O-4 dimers and do not sufficiently mimic the wide complexity of lignin structure (i.e., aliphatic side chains and robust C-C bonds). Herein
Shahina Riaz et al.
Materials (Basel, Switzerland), 12(8) (2019-04-28)
A series of composites was prepared from a diglycidyl ether of bisphenol A (DGEBA) with different graphene filler contents to improve their mechanical performance and thermal stability. Graphene oxide (GO) and GO modified with hexamethylene tetraamine (HMTA) were selected as
Tomoko Fujino et al.
Chemistry, an Asian journal, 10(12), 2683-2688 (2015-08-08)
Chimeric RNA oligonucleotides with an artificial triazole linker were synthesized using solution-phase click chemistry and solid-phase automated synthesis. Scalable synthesis methods for jointing units for the chimeric structure have been developed, and after click-coupling of the jointing units with triazole
Virender Kumar et al.
Theranostics, 9(25), 7537-7555 (2019-11-07)
Rationale: Hedgehog (Hh) pathway plays an essential role in liver fibrosis by promoting the proliferation of hepatic stellate cells (HSCs) by enhancing their metabolism via yes-associated protein 1 (YAP1). Despite the presence of several inhibitors, Hh signaling cannot be controlled
Vera Martos et al.
Journal of combinatorial chemistry, 11(3), 410-421 (2009-03-10)
A simple solid-phase synthesis of thioether-linked chiral bicyclic guanidinium oligomers for cell internalization purposes has been developed. The approach is based on a Merrifield-like peptide synthesis on Rinkamide-p-methylbenzhydrylamine resin functionalized with Cys(methoxytrityl). A difunctionalized bicyclic guanidinium synthon, bearing both electrophile
Wenqiang Tan et al.
International journal of biological macromolecules, 101, 845-851 (2017-04-05)
1,2,3-Triazolium-functionalized starch derivative was obtained by straightforward quaternization of the synthesized starch derivative bearing 1,2,3-triazole with benzyl bromide by combining the robust attributes of cuprous-catalyzed azide-alkyne cycloaddition. These novel starch derivatives were characterized by FTIR, UV-vis
Si Jia Chan et al.
Magnetic resonance in chemistry : MRC, 47(4), 342-347 (2009-02-04)
(79)Br NMR spectroscopy has been used to monitor a series of reactions in which the bromide ion is produced, including the Menschutkin reaction of pyridine with a range of substituted benzyl bromides and a Heck coupling process. In cases where
Maia Merlani et al.
Current topics in medicinal chemistry, 19(4), 292-304 (2019-01-25)
Phenolic acids (caffeic-, ferulic and p-coumaric acid) are widely distributed in the plant kingdom and exhibit broad spectrum of biological activities, including antimicrobial activity. The goal of this paper is the synthesis of some caffeic acid derivatives selected based on
Amos B Smith et al.
The Journal of organic chemistry, 72(13), 4596-4610 (2007-05-22)
A first-generation strategy for construction of (+)-nodulisporic acids A (1) and B (2) is described. The strategy entails union of the eastern and western hemisphere subtargets via the indole synthesis protocol developed in our laboratory. Subsequent elaboration of rings E
Sean Allen et al.
Journal of controlled release : official journal of the Controlled Release Society, 262, 91-103 (2017-07-25)
Flash nanoprecipitation (FNP) has proven to be a powerful tool for the rapid and scalable assembly of solid-core nanoparticles from block copolymers. The process can be performed using a simple confined impingement jets mixer and provides an efficient and reproducible
David J S Patinha et al.
Talanta, 198, 193-199 (2019-03-17)
In this work, a facile preparation of SPME fibers with increased surface area is presented. The SPME fibers were prepared by grinding poly(ionic liquids) (PILs) to obtain particles of 1-16 µm and, with the aid of a silicon adhesive, attach these
Mihály Bálint et al.
Electrophoresis, 40(15), 1941-1950 (2019-03-21)
The exhaustive primary-side alkylation of cyclodextrins has never been achieved directly. The undesired and simultaneous derivatization of the secondary hydroxyl moieties generates intricate isomeric mixtures that are challenging to purify, analyse and characterize. The aim of this study was to
Thierry León et al.
Journal of the American Chemical Society, 135(4), 1221-1224 (2013-01-11)
A novel Ni-catalyzed carboxylation of benzyl halides with CO(2) has been developed. The described carboxylation reaction proceeds under mild conditions (atmospheric CO(2) pressure) at room temperature. Unlike other routes for similar means, our method does not require well-defined and sensitive
Graeme Horne et al.
Carbohydrate research, 339(1), 51-65 (2003-12-09)
Novel, structurally modified potential mimics of the second messenger D-myo-inositol 1,4,5-trisphosphate, based on the biologically active regioisomer D-myo-inositol 1,4,6-trisphosphate, were synthesised. DL-5-O-Benzyl-1,4,6-tri-O-p-methoxybenzyl-myo-inositol was the key intermediate for the preparation of the following compounds: DL-3-deoxy-, DL-3-deoxy-2-O-methyl-, DL-3-O-(2-hydroxyethyl)-, DL-3-O-(3-hydroxypropyl)- and DL-3-O-(4-hydroxybutyl)-myo-inositol 1,4,6-trisphosphate.
Simon J Mountford et al.
Organic & biomolecular chemistry, 15(34), 7173-7180 (2017-08-16)
The first total synthesis of a polypeptin, PE2, as well as its solution structure is reported. Synthesis in optically pure form confirms the proposed stereochemistry of the polypeptins at the 3-position on the 3-hydroxy depsipeptide moiety. We have also determined
Lingfei Han et al.
Theranostics, 9(22), 6532-6549 (2019-10-08)
Precision medicine has increased the demand for stage-specific cancer chemotherapy. Drugs with different properties are needed for different stages of tumor development, which is, inducing rapid destruction in the early stage and facilitating deep penetration in the advanced stage. Herein
Lutz F Tietze et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 14(8), 2527-2535 (2008-01-18)
The Pd-catalyzed domino Tsuji-Trost-Heck-Mizoroki reactions of compounds 18, 27, and 34, respectively, each containing an allyl acetate and a halogen aryl moiety, lead to the formation of hexahydronaphthacenes 2 and 3 and octahydroanthracene 4 in 62-81 % yield. The octahydroanthracene
John Mondal et al.
Chemical communications (Cambridge, England), 48(64), 8000-8002 (2012-07-10)
Surface functionalization of SBA-15 followed by its reaction with Cu(OAc)(2) has been carried out to develop a new Cu-grafted functionalized mesoporous material, which catalyzes one-pot three component coupling of different aryl halides with thiourea and benzyl bromide in aqueous medium
Fatemeh M Mir et al.
Journal of medicinal chemistry, 62(9), 4500-4525 (2019-04-02)
Peptide mimicry employing a combination of aza-amino acyl proline and indolizidinone residues has been used to develop allosteric modulators of the prostaglandin F2α receptor. The systematic study of the N-terminal phenylacetyl moiety and the conformation and side chain functions of
Jan-Hendrik Kruse et al.
Macromolecular rapid communications, 40(10), e1800857-e1800857 (2019-01-18)
Polydehydroalanine (PDha) is a polyampholyte featuring both a -NH2 and a -COOH in every repeat unit and with that presents a rather high charge density. The synthesis and polymerization of two monomers, benzyl 2-tert-butoxycarbonylaminoacrylate and methyl 2-benzyloxycarbonylaminoacrylate is herein reported
Yanna Liu et al.
Pharmaceutics, 12(4) (2020-04-15)
To improve the in vivo stability of poly(-caprolactone)-b-poly(ethylene glycol) (PCL-PEG)-based micelles and cargo retention by π-π stacking interactions, pendant aromatic rings were introduced by copolymerization of -caprolactone with benzyl 5-methyl-2-oxo-1,3-dioxane-5-carboxylate (TMC-Bz). It was shown that the incorporation of aromatic rings
Jorge Caeiro et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 14(2), 741-746 (2007-10-12)
The first enantioselective sp-sp3 cross-coupling reaction between alkynyl organometals and racemic benzyl bromides is reported. The coupling is performed at room temperature by using NiBr2diglyme and (S)-(iPr)-Pybox as the catalytic system and trialkynylindium reagents as nucleophiles. The reaction is stereoconvergent
Giuseppe Belletti et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(4), 839-844 (2019-10-31)
Viedma ripening is a deracemization process that has been used to deracemize a range of chiral molecules. The method has two major requirements: the compound needs to crystallize as a conglomerate and it needs to be racemizable under the crystallization
Mingyang Liu et al.
Science advances, 4(10), eaas9319-eaas9319 (2018-10-13)
One-pot oxidative transformation of alcohols into esters is very attractive, but metal-based catalysts are used in the reported routes. We discovered that the basic ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM] OAc) could effectively catalyze this kind of reaction using O2 as
Wing-Yiu Yu et al.
Organic letters, 11(2), 469-472 (2008-12-23)
A Pd-catalyzed cross-coupling reaction of benzyl bromides with alpha-aryldiazoesters is described, and E-alpha,beta-diarylacrylates were obtained in good yields and excellent E-to-Z selectivity (>20:1).
Carole Bubloz et al.
Chimia, 74(10), 828-830 (2020-10-30)
Awareness of health benefits of goji berries coming from their bioactive compounds, mostly antioxidants like ascorbic acid, has grown. Recently, an ascorbic acid analogue from goji berries, the 2-O-β-D-glucopyranosyl-L-ascorbic acid has been reported. In rats, the analogue is absorbed intact
Saron Catak et al.
The Journal of organic chemistry, 75(13), 4530-4541 (2010-05-29)
Ring opening of 1-arylmethyl-2-(cyanomethyl)aziridines with HBr afforded 3-(arylmethyl)amino-4-bromobutyronitriles via regiospecific ring opening at the unsubstituted aziridine carbon. Previous experimental and theoretical reports show treatment of the same compounds with benzyl bromide to furnish 4-amino-3-bromobutanenitriles through ring opening at the substituted
Wei Lin et al.
Molecular cell, 70(1), 60-71 (2018-04-03)
Fidaxomicin is an antibacterial drug in clinical use for treatment of Clostridium difficile diarrhea. The active ingredient of fidaxomicin, lipiarmycin A3 (Lpm), functions by inhibiting bacterial RNA polymerase (RNAP). Here we report a cryo-EM structure of Mycobacterium tuberculosis RNAP holoenzyme in
Takashi Yamanoi et al.
Carbohydrate research, 343(8), 1366-1372 (2008-04-22)
Several partially benzylated mono-, di-, and trisaccharides having an anomeric hydroxyl group were successfully prepared by selective cleavage of the beta-fructofuranosidic linkage in fully benzylated sucrose and sucrose-related oligosaccharides derived from lactosucrose, raffinose, melezitose, stachyose, and nystose under acidic conditions
Osamu Kimura et al.
Toxicology letters, 277, 18-23 (2017-05-30)
The mechanism underlying the intestinal absorption of perfluorooctanoic acid (PFOA) was investigated using Caco-2 cells. The uptake of PFOA from the apical membrane of Caco-2 cells was fast, and pH, temperature, and concentration dependent, but Na
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