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273031

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Wenjie Ye et al.
Journal of the American Chemical Society, 131(17), 6114-6123 (2009-04-10)
The oxidation of guanine to 5-carboxamido-5-formamido-2-iminohydantoin (2-Ih) is shown to be a major transformation in the oxidation of the single-stranded DNA 5-mer d(TTGTT) by m-chloroperbenzoic acid (m-CPBA) and dimethyldioxirane (DMDO) as a model for peracid oxidants and in the oxidation...
Alexandre Baralle et al.
Macromolecular rapid communications, 41(6), e1900644-e1900644 (2020-02-06)
In a significant breakthrough from classical molecular (i.e., nonpolymeric) iodonium salts in light-induced photochemistry, the synthesis and use of new safer polymeric iodonium salts are reported here. They are shown to be involved in charge transfer complexes (CTCs) while in...
Which oxidant is really responsible for P450 model oxygenation reactions? A kinetic approach.
Alicja Franke et al.
Angewandte Chemie (International ed. in English), 47(28), 5238-5242 (2008-06-04)
Yvan Ecochard et al.
Molecules (Basel, Switzerland), 24(9) (2019-05-15)
Epoxy materials have attracted attention for many applications that require fireproof performance; however, the utilization of hazardous reagents brings about potential damage to human health. Eugenol and cardanol are renewable, harmless resources (according to ECHA) that allow the achievement of...
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Xiaoyan Tang et al.
Nature communications, 9(1), 2345-2345 (2018-06-13)
Bacterial poly(3-hydroxybutyrate) (P3HB) is a perfectly isotactic, crystalline material possessing properties suitable for substituting petroleum plastics, but high costs and low volumes of its production are impractical for commodity applications. The chemical synthesis of P3HB via ring-opening polymerization (ROP) of...
Evgeny V Kudrik et al.
Nature chemistry, 4(12), 1024-1029 (2012-11-24)
High-valent oxo-metal complexes are involved in key biochemical processes of selective oxidation and removal of xenobiotics. The catalytic properties of cytochrome P-450 and soluble methane monooxygenase enzymes are associated with oxo species on mononuclear iron haem and diiron non-haem platforms...
Thies Thiemann et al.
Molecules (Basel, Switzerland), 14(3), 1013-1031 (2009-03-24)
Brominated anthraquinones can be synthesized directly from bromothiophenes when these are reacted with 1,4-naphthoquinones in the presence of meta-chloroperoxybenzoic acid. The bromoanthraquinones are versatile building blocks in the preparation of arylated anthraquinones and of extended pi-systems with interspersed anthraquinone units.
Stefan Oelmann et al.
Biomacromolecules, 20(1), 90-101 (2018-06-06)
A Passerini three-component polymerization was performed for the synthesis of amphiphilic star-shaped block copolymers with hydrophobic cores and hydrophilic coronae. The degree of polymerization of the hydrophobic core was varied from 5 to 10 repeating units, and the side chain...
Gurmit Singh et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 28(6), 731-739 (2011-05-31)
Malachite green (MG), a member of the N-methylated triphenylmethane class of dyes, has long been used to control fungal and protozoan infections in fish. MG is easily absorbed by fish during waterborne exposure and is rapidly metabolized into leucomalachite green...
Hsuan-Ying Chen et al.
Colloids and surfaces. B, Biointerfaces, 156, 243-253 (2017-05-24)
Novel comb-shaped amphiphilic copolymers based on methoxy poly(ethylene glycol)-b-[poly(ε-caprolactone)-g-poly(methacrylic acid)] (MPCL-g-pMAA), were synthesized via ring opening polymerization (ROP) and atom transfer radical polymerization (ATRP) for drug delivery systems. MPCL-g-pMAAs with various MAA repeating units self-assemble into a core-shell structure in...
Axel Haupt et al.
Chemistry, an Asian journal, 13(20), 3022-3026 (2018-09-12)
Trifluoromethylthio-substituted corannulene can be easily synthesized in good yield by the reaction of iodocorannulene with CuSCF3 . Oxidation with meta-chloroperbenzoic acid (mCPBA) yields the corresponding sulfonyl compound which exhibits the largest anodic shift of the redox potential caused by a...
Sagarika Bhattacharya et al.
ACS nano, 13(2), 1433-1442 (2019-01-08)
Multicolor, fluorescent self-healing gels were constructed through reacting carbon dots produced from different aldehyde precursors with branched polyethylenimine. The self-healing gels were formed through Schiff base reaction between the aldehyde units displayed upon the carbon dots' surface and primary amine...
Binoy Maiti et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 23(60), 15156-15165 (2017-08-30)
Poly[2-(methacryloyloxy)ethyl oleate-co-pentafluorophenyl methacrylate] [P(MAEO-co-PFPMA)] random copolymers with oleate and pentafluorophenyl side-chain pendants were synthesized. These copolymers were utilized as dual-reactive polymeric scaffolds in a range of post-polymerization modification strategies involving thiol-ene and para-fluoro-thiol substitution, amidation, trans-esterification, and epoxidation followed by...
Melanie A Ehudin et al.
Journal of the American Chemical Society, 141(27), 10632-10643 (2019-06-01)
Cytochrome c oxidase (CcO) catalyzes the reduction of dioxygen to water utilizing a heterobinuclear active site composed of a heme moiety and a mononuclear copper center coordinated to three histidine residues, one of which is covalently cross-linked to a tyrosine...
Irshad S Sharafutdinov et al.
International journal of molecular sciences, 20(3) (2019-02-10)
Staphylococcus aureus causes various infectious diseases, from skin impetigo to life-threatening bacteremia and sepsis, thus appearing an important target for antimicrobial therapeutics. In turn, the rapid development of antibiotic resistance and biofilm formation makes it extremely robust against treatment. Here...
Maria José G Fernandes et al.
International journal of molecular sciences, 21(23) (2020-12-10)
Eugenol, the generic name of 4-allyl-2-methoxyphenol, is the major component of clove essential oil, and has demonstrated relevant biological potential with well-known antimicrobial and antioxidant actions. New O-alkylated eugenol derivatives, bearing a propyl chain with terminals like hydrogen, hydroxyl, ester...
Omar F Khan et al.
Nano letters, 15(5), 3008-3016 (2015-03-20)
Targeted RNA delivery to lung endothelial cells has the potential to treat conditions that involve inflammation, such as chronic asthma and obstructive pulmonary disease. To this end, chemically modified dendrimer nanomaterials were synthesized and optimized for targeted small interfering RNA...
Hua Chen et al.
Carbohydrate research, 365, 1-8 (2012-11-20)
An efficient and practical synthesis of kifunensine thioanalogs 1a-c was reported. The bicyclic azasugars fused thiazolidin-4-one 4a-c as key intermediates were first synthesized in good yields of 74-80% via one-pot tandem Staudinger/aza-Wittig/cyclization by using the pivotal azidosugars 3a and 3b...
Chiral Mn (III) salen complexes covalently bonded on modified MCM-41 and SBA-15 as efficient catalysts for enantioselective epoxidation of nonfunctionalized alkenes.
Kureshy R
J. Catal., 238(1), 134-141 (2006)
Patrícia F Monteiro et al.
Journal of controlled release : official journal of the Controlled Release Society, 323, 549-564 (2020-05-07)
Triple negative or basal-like breast cancer (TNBC) is characterised by aggressive progression, lack of standard therapies and poorer overall survival rates for patients. The bad prognosis, high rate of relapse and resistance against anticancer drugs have been associated with a...
Chao Zhao et al.
Nucleic acids research, 42(9), e81-e81 (2014-04-01)
The gene- or fragment-specific detection of newly recognized deoxyribonucleic acid (DNA) base 5-hydroxymethylcytosine (5hmC) will provide insights into its critical functions in development and diseases, and is also important for screening 5hmC-rich genes as an indicator of epigenetic states, pathogenic...
Lingling Liu et al.
Food chemistry, 333, 127488-127488 (2020-07-19)
A mild mixed-solvent of n-hexane/isopropanol is proposed for extracting total mineral oil hydrocarbons (MOH) from commercial milk powder products. Unlike acid-hydrolysis, the mixed-solvent extraction was performed at ambient temperature and the low-boiling-point hydrocarbons were retained to the greatest extent. After...
Kailiang Wang et al.
The Journal of organic chemistry, 74(2), 935-938 (2008-12-05)
Easily available and nontoxic FeCl(3) catalyzes intramolecular oxidative coupling for the direct construction of the phenanthrene ring using meta-chloroperbenzoic acid as sole oxidant at room temperature in excellent yields. The mechanistic investigations show that FeCl(3)-catalyzed coupling proceeds through the heterolytic...
Junfeng Zhu et al.
Polymers, 11(12) (2019-12-18)
A novel nitroxyl radical polymer poly(TEMPO-acrylamide-co-sodium styrene sulfonate) (abbreviated as poly(TAm-co-SSS)) was synthesized using 4-acrylamido-2,2,6,6- tetramethylpiperidine (AATP) copolymerized with styrene sulfonate sodium (SSS). AATP was synthesized through a substitution reaction of acryloyl chloride. Meanwhile, poly(4-acrylamido-2,2,6,6-tetramethylpiperidine-1-nitroxyl radical) (PTAm) was prepared as...
Ari Dwi Nugraheni et al.
Journal of inorganic biochemistry, 182, 200-207 (2018-03-07)
The Met80-heme iron bond of cytochrome c (cyt c) is cleaved by the interaction of cyt c with cardiolipin (CL) in membranes. The Met80 dissociation enhances the peroxidase activity of cyt c and triggers cyt c release from mitochondrion to...
Santhosh Sivaramakrishnan et al.
Biochemistry, 50(14), 3014-3024 (2011-03-09)
Cytochrome P450-mediated monooxygenation generally proceeds via a reactive ferryl intermediate coupled to a ligand radical [Fe(IV)═O]+• termed Compound I (Cpd I). The proximal cysteine thiolate ligand is a critical determinant of the spectral and catalytic properties of P450 enzymes. To...
Annelies Van Heyst et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 35(10), 2062-2075 (2018-09-11)
Recently, migration of mineral oil components from food contact materials into various foods has been reported. The analysis of mineral oil in food is complicated since it consists of mineral oil saturated hydrocarbons (MOSH) comprising a complex mixture of linear...
Yan Zhao et al.
International journal of biological macromolecules, 155, 1468-1477 (2019-11-22)
In this work, silica nanoparticles modified with a new N-halamine precursor (EBDMH-SiO2 NPs) were synthesized through immobilization of 3-(4'-epoxyethyl-benzyl)-5,5-dimethylhydantoin (EBDMH) on the surface of amino-functionalized silica NPs. Then, EBDMH-SiO2 NPs and poly(lactic acid) (PLA) were blended at 185 °C to prepare...
Aleksandra Grudniewska et al.
PloS one, 10(7), e0131028-e0131028 (2015-07-02)
Two racemic and two enantiomeric pairs of new δ-hydroxy-γ-lactones based on the p-menthane system were prepared from racemic and optically active cis- and trans-piperitols. The Johnson-Claisen rearrangement of the piperitols, epoxidation of the γδ-unsaturated esters, and acidic lactonization of the...
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