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205249

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Daniel G Abebe et al.
Macromolecular bioscience, 15(5), 698-711 (2015-02-04)
"Three-layered micelles" (3LM) composed of two triblock copolymers, poly(L-lactide)-b-polyethyleneimine-b-poly(L-lactide) (PLLA-PEI-PLLA) and poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) (PLLA-PEG-PLLA) are designed to combine electrostatic interaction and solvent-induced condensation of DNA. The low molecular weight PLLA-PEI-PLLA is synthesized by a facile amine-protection/deprotection approach and employed as
Tommy Siu-Ming Tang et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(30), 10729-10740 (2015-06-23)
The synthesis, characterization, photophysics, lipophilicity, and cellular properties of new phosphorescent ruthenium(II) polypyridine complexes functionalized with a dibenzocyclooctyne (DIBO) or amine moiety [Ru(N^N)2 (L)](PF6 )2 are reported (L=4-(13-N-(3,4:7,8-dibenzocyclooctyne-5-oxycarbonyl) amino-4,7,10-trioxa-tridecanyl-aminocarbonyl-oxy-methyl)-4'-methyl-2,2'-bipyridine bpy-DIBO, N^N=2,2'-bipyridine bpy (1 a), 1,10-phenanthroline phen (2 a); L=4-(13-amino-4,7,10-trioxa-tridecanylaminocarbonyl-oxy-methyl)-4'-methyl-2,2'-bipyridine bpy-NH2 , N^N=bpy
J S Allen et al.
Mutation research, 170(1-2), 23-29 (1986-04-01)
The Ames Salmonella/mammalian-microsome assay was used to evaluate the bacterial mutagenicity of 6 bioactive peptides and of 11 chemical reagents used in peptide synthesis. Samples of 2 reagents, bis(2-oxo-3-oxazolidinyl)phosphinic chloride and fluoren-9-ylmethyl chloroformate, showed mutagenic activity with strains TA100 and
Elena Geromichalou et al.
European journal of medicinal chemistry, 96, 47-57 (2015-04-16)
Recent science evidenced the interlinkage of oxidative stress and cancer. Due to the inherent complexity of cancer and its accompanying effect of oxidative stress, novel molecules, containing combinatorial functionalities should be targeted. Herein, we synthesized gemcitabine-5'-O-lipoate derived from a regioselective
Tadla Vijeetha et al.
Journal of oleo science, 64(7), 705-712 (2015-05-23)
The study involved synthesis of five novel amino acid derivatives of phosphatidylethanolamine isolated from egg yolk lecithin employing a three step procedure i) N-protection of L-amino acids with BOC anhydride in alkaline medium ii) condensation of - CO2H group of
Giuseppe Bartoli et al.
The Journal of organic chemistry, 71(26), 9580-9588 (2006-12-16)
The reaction between alcohols and Boc2O leads to the formation of tert-butyl ethers and/or Boc-alcohols, depending on the nature of the Lewis acid catalyst. Product distribution is mainly tuned by the anionic part of the salt. Perchlorates and triflates, anions
Sasmita Mohapatra et al.
Dalton transactions (Cambridge, England : 2003), 43(42), 15841-15850 (2014-09-17)
The development of theranostic mesoporous hollow silica nanospheres having therapeutic and diagnostic functions has been achieved. The exterior surface of the hollow mesoporous silica nanosphere was selectively acid functionalized and utilised to conjugate the anticancer drug cisplatin, the marker molecule
Jun-Qing Situ et al.
International journal of nanomedicine, 10, 665-675 (2015-02-06)
The delivery of chemotherapeutics into tumor cells is a fundamental knot for tumor-target therapy to improve the curative effect and avoid side effects. Here, A54 peptide-functionalized poly(lactic-co-glycolic acid)-grafted dextran (A54-Dex-PLGA) was synthesized. The synthesized A54-Dex-PLGA self-assembled to form micelles with
Debmalya Roy et al.
Magnetic resonance in chemistry : MRC, 42(1), 76-80 (2004-01-28)
The precise estimation of the degree of derivatization of functional groups in polymers is important for determining their macroscopic properties. In this work, the quantitative estimation of the extent of esterification of novolac copolymers with di-tert-butyl dicarbonate was studied. Although
Laura M Thoma et al.
Biomacromolecules, 15(8), 2933-2943 (2014-07-11)
The in vitro and in vivo antimicrobial activity of primary ammonium ethyl methacrylate homopolymers (AEMPs) was investigated. AEMPs with different degrees of polymerization (DP = 7.7-12) were prepared by reversible addition-fragmentation chain-transfer (RAFT) polymerization. The AEMPs showed higher inhibitory effects
Sevnur Serim et al.
Organic & biomolecular chemistry, 13(8), 2293-2299 (2015-01-03)
Activity-based probes (ABPs) are powerful tools for the analysis of active enzyme species in whole proteomes, cells or animals. Quenched fluorescent ABPs (qABPs) can be applied for real time imaging, allowing the visualization of dynamic enzyme activation by fluorescent microscopy.
Wendell Ho-Tin Law et al.
ChemMedChem, 9(6), 1316-1329 (2014-03-20)
We present a new class of phosphorescent cyclometalated iridium(III) bipyridyl-phenylenediamine complexes [Ir(N^C)2 (bpy-DA)](PF6 ) (bpy-DA=4-(N-(2-amino-5-methoxyphenyl)aminomethyl)-4'-methyl-2,2'-bipyridine; HN^C=2-(2,4-difluorophenyl)pyridine (Hdfppy) (1 a), 2-phenylpyridine (Hppy) (2 a), 2-phenylquinoline (Hpq) (3 a), 2-phenylcinchoninic acid methyl ester (Hpqe) (4 a)) and their triazole counterparts [Ir(N^C)2 (bpy-T)](PF6
E E Büllesbach et al.
Hoppe-Seyler's Zeitschrift fur physiologische Chemie, 361(5), 723-734 (1980-05-01)
Nepsilon 29, Nepsilon 59-Bis(methylsulfonylethoxycarbonyl)proinsulin was prepared from native beef proinsulin for its possible use in the semisynthesis of preproinsulin. The modification was made possible by first protecting the alpha-amino group of proinsulin either with the tert-butoxycarbonyl group, after reaction with
Hans Peter Reisenauer et al.
Angewandte Chemie (International ed. in English), 53(44), 11766-11771 (2014-09-10)
Carbonic acid (H2CO3), an essential molecule of life (e.g., as bicarbonate buffer), has been well characterized in solution and in the solid state, but for a long time, it has eluded its spectral characterization in the gas phase owing to
Pavla Simerska et al.
Drug delivery and translational research, 4(3), 246-255 (2015-03-20)
Peptide-based vaccine delivery can be hampered by rapid peptidase activity and poor inherent immunogenicity. The self-adjuvanting lipid core peptide system (LCP) has been shown to confer improved stability and immunogenicity on peptide epitopes of group A Streptococcus, Chlamydia, hookworm, and
Simon K Shannon et al.
The Journal of organic chemistry, 69(14), 4586-4594 (2004-07-03)
A direct method for quantifying solid-phase aldehydes has been developed, using a new reagent, 4-(9-fluorenylmethyloxycarbonyl)phenylhydrazine (FmPH). The FmPH reagent was synthesized in three steps (24% overall yield) from commercially available p-hydrazinobenzoic acid. Resin-bound aldehydes reacted quantitatively with FmPH, in the
Brandon S Fowler et al.
Journal of the American Chemical Society, 132(9), 2870-2871 (2010-02-18)
We report a fundamentally unique approach to the catalytic kinetic resolution of amine derivatives based on formamide and thioformamide substrates. Readily accessible histidine-containing peptides mediate the kinetic resolutions with as little as 5 mol % catalyst. Selectivity factors (k(rel)) as
Jason C Green et al.
Organic letters, 13(20), 5500-5503 (2011-09-21)
Total syntheses of two structures purported as (+)-heliananes were completed in six pots. Spectral comparisons, between the synthetic and natural compounds, revealed a misassignment of the eight-membered ring in the heliananes. The key step in the syntheses of the proposed
Diana Vivian et al.
International journal of pharmaceutics, 475(1-2), 597-604 (2014-09-16)
Floxuridine is often used to treat metastatic liver disease and is given as an infusion directly into the hepatic artery to increase the amount of intact drug that reaches the liver. The objective of this work was to design and
Elena Pérez et al.
International journal of pharmaceutics, 470(1-2), 107-119 (2014-05-13)
Environmentally sensitive hydrogels have gained considerable attention in recent years as one of the most promising drug delivery systems. In the present study, two new formulations of pH and temperature stimuli-responsive nanogels (NGs) based on poly-N-isopropylacrylamide (NIPA), N-hydroxyethyl acrylamide (HEAA)
Wanyi Tai et al.
Biomaterials, 35(25), 7194-7203 (2014-05-31)
A graft copolymer with pendant drug segments can fold into nanostructures in a protein folding-like manner. The graft copolymer is constructed by directly polymerizing γ-camptothecin-glutamate N-carboxyanhydride (Glu(CPT)-NCA) on multiple sites of poly(ethylene glycol) (PEG)-based main chain via the ring open
Asit K Chakraborti et al.
Organic & biomolecular chemistry, 4(14), 2769-2771 (2006-07-11)
Perchloric acid adsorbed on silica-gel (HClO4-SiO2) was found to be a new, highly efficient, inexpensive and reusable catalyst for chemoselective N-tert-butoxycarbonylation of amines at room temperature and under solvent-free conditions.
Ashish Punia et al.
International journal of molecular sciences, 16(10), 23867-23880 (2015-10-17)
Synthetic amphiphilic polymers have been established as potentially efficient agents to combat widespread deadly infections involving antibiotic resistant superbugs. Incorporation of poly(ethylene glycol) (PEG) side chains into amphiphilic copolymers can reduce their hemolytic activity while maintaining high antibacterial activity. Our
Chunhua Qiao et al.
Journal of the American Chemical Society, 126(25), 8038-8045 (2004-06-24)
Propargylic and activated allylic amines are known to inactivate the quinone-dependent plasma amine oxidases, possibly through active-site modification by the alpha,beta-unsaturated aldehyde turnover products. Although homopropargylamine (1-amino-3-butyne, 1) is a nonobvious candidate as a mechanism-based inhibitor, 1 was found to
Yi Liu et al.
International journal of nanomedicine, 10, 2295-2311 (2015-04-08)
7-Ethyl-10-hydroxycamptothecin (SN38), an active metabolite of irinotecan (CPT-11), is a remarkably potent antitumor agent. The clinical application of SN38 has been extremely restricted by its insolubility in water. In this study, we successfully synthesized two macromolecular prodrugs of SN38 with
Kohji Abe et al.
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 34(12), 1907-1913 (2014-09-18)
To assess reactive oxygen species (ROS) production by detecting the fluorescent oxidation product, hydroethidine has been used extensively. The present study was undertaken to evaluate the potential of the hydroethidine derivative as a radiotracer to measure in vivo brain ROS
Shahul Hameed P et al.
Nature communications, 6, 6715-6715 (2015-04-01)
The widespread emergence of Plasmodium falciparum (Pf) strains resistant to frontline agents has fuelled the search for fast-acting agents with novel mechanism of action. Here, we report the discovery and optimization of novel antimalarial compounds, the triaminopyrimidines (TAPs), which emerged
Synthetic Communications, 23, 1443-1443 (1993)
Lucia Cenci et al.
Journal of nanobiotechnology, 13, 51-51 (2015-08-28)
Molecularly imprinted polymer (MIP) technique is a powerful mean to produce tailor made synthetic recognition sites. Here precipitation polymerization was exploited to produce a library of MIP nanoparticles (NPs) targeting the N terminus of the hormone Hepcidin-25, whose serum levels
Synlett, 2104-2104 (2006)
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