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Boron Compounds (4):
Recent article
Boron Compounds
Organic Letters (13)14 2011
Abstract
A fluorescent sensor for cadmium (CS) based on the BODIPY fluorophore exploiting the PET (Photoinduced Electron Transfer) mechanism was prepared. CS exhibited high selectivity and sensitivity for detecting cadmium in aqueous buffer solution. In addition, the complex of CS with cadmiu...
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PMID: 21688791
PDF is available here.
PDF is available here.
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Organic Letters (13)6 2011
Abstract
In combination with the Bedford Pd precursor, the new biaryl monophosphorus ligand 5 was efficient for palladium-catalyzed Miyaura borylation of sterically hindered aryl bromides at low catalyst loadings.
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PMID: 21319836
PDF is available here.
PDF is available here.
Abstract
To evaluate the stability of the interfacial layer and leakage patterns between enamel, DEJ, dentin and three adhesive systems as demonstrated by either a dye or a silver nitrate technique to understand the marginal integrity of restored tooth substrates.
Extracted human molars were cross-sectioned...
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PMID: 21207797
PDF is available here.
PDF is available here.
Abstract
Bioactive glass scaffolds with a microstructure similar to that of dry human trabecular bone but with three different compositions were evaluated for potential applications in bone repair. The preparation of the scaffolds and the effect of the glass composition on the degradation and...
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PMID: 20544804
PDF is available here.
PDF is available here.
Anticancer Research (30)9 2010
Abstract
We describe herein for the first time our medicinal electronomics bricolage design of hypoxia-targeting antineoplastic drugs and boron tracedrugs as newly emerging drug classes. A new area of antineoplastic drugs and treatments has recently focused on neoplastic cells of the tumor environment/microe...
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PMID: 20944092
PDF is available here.
PDF is available here.
Abstract
We used a series of molecules known to inactivate various elements of the pathway. W-7 prevents CaM from interacting with other molecules. Neomycin isolates PIP(2) from PLC. U-73122 directly inactivates PLC. 2-APB blocks IP(3) receptors which would otherwise cause release of Ca(2+). Verapamil and Cd...
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PMID: 20416320
PDF is available here.
PDF is available here.
Abstract
A new fluorescent turn-on probe for the rapid optical sensing of thiols has been designed and synthesized. The probe displays high on/off signal ratios and high selectivity towards thiols. The potential of the probe as a biosensor for thiols was demonstrated by imaging of thiols in living cells.
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PMID: 20593078
PDF is available here.
PDF is available here.
Thrombosis and Haemostasis (104)2 2010
Abstract
We investigate the role of beta2-glycoprotein I in the phagocytosis of phosphatidylserine-expressing platelet microvesicles and the effect of autoantibodies to beta2-glycoprotein I on this process. We labelled the glycans of beta2-glycoprotein I with BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacen...
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PMID: 20539917
PDF is available here.
PDF is available here.
Abstract
Systematic studies are presented demonstrating the complementarity of directed ortho metalation (DoM) and Ir-catalyzed strategies for the provision of borylated aromatics and their subsequent Suzuki-Miyaura coupling reactions. A new concept, the use of the TMS group, readily introduced by DoM, as a...
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PMID: 20533457
PDF is available here.
PDF is available here.
British Journal of Radiology (83)991 2010
Abstract
The purpose of this study was to assess the potential of boron neutron capture therapy (BNCT), with a 6-h infusion of the boron carrier l-boronophenylalanine as a fructose preparation (BPA-f), as first-line radiotherapy for newly diagnosed glioblastoma multiforme (GBM). Patient survival data from a...
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PMID: 20603410
PDF is available here.
PDF is available here.
Abstract
A Gallium Nitride (GaN) dispersed boron nitride (BN) nanocomposite powder was synthesized by heating a mixture of gallium nitrate, boric acid, and urea in a hydrogen atmosphere. Before heat treatment, crystalline phases of urea, boric acid, and gallium nitrate were recognized, but an amorphous mater...
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PMID: 21128417
PDF is available here.
PDF is available here.
Journal of Hazardous Materials (178)1-3 2010
Abstract
Novel biocides, such as copper azole (CuAz) and ammoniacal copper quaternary (ACQ), are extensively used as substitutes for chromate copper arsenate (CCA) in wood preservation. However, the expense of these biocides has necessitated the development of cost-effective and environmentally friendly wood...
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PMID: 20153107
PDF is available here.
PDF is available here.
Cell Calcium (47)6 2010
Abstract
We have assessed the effect of hypotonic cell volume increase on SOCE in a salivary gland epithelial cell line (HSG). Thapsigargin (Tg) activated a 2APB- and 1microM Gd(3+)-sensitive, inwardly rectifying, cation current, I(SOC), while hypotonic solution (150mOsm) induced cell swelling and activated...
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PMID: 20488539
PDF is available here.
PDF is available here.
Abstract
We developed a functional genomics-based assay, combining high-throughput RNA interference (HT-RNAi) screening with high-content fluorescence imaging to identify specific genes in NPC cells that will result in more normal cholesterol levels in the diseased cells. Conditions for siRNA tranfections we...
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PMID: 20469965
PDF is available here.
PDF is available here.
Abstract
We have developed a fluorescence anisotropy (FA) assay for the muscarinic M1 receptor that can be conducted in a 384-well plate. We used membranes from a muscarinic M1 cell line optimized for high-throughput functional assays and the previously characterized fluorescent antagonist BODIPY FL pirenzep...
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PMID: 20233092
PDF is available here.
PDF is available here.
Abstract
The Alloy Primer and V-Primer agents containing a triazine dithione monomer (VTD) bonded the Ag-Pd-Cu-Au alloy, whereas the Alloy Primer and Estenia Opaque Primer agents containing a hydrophobic phosphate monomer (MDP) bonded titanium. The reduction in bond strength after 20,000 thermocycles was not...
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PMID: 20157662
PDF is available here.
PDF is available here.
Chemical Communications (46)20 2010
Abstract
A BODIPY derivative with an -NH(2) and -OH substituted meso-phenyl group is reported, which, under biological conditions, exhibits metal-induced J-aggregation in the presence of Cu(2+) and a specific fluorescence enhancement for Hg(2+).
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PMID: 20393661
PDF is available here.
PDF is available here.
Abstract
We report the synthesis of three fluorescent analogues of alpha-tocopherol incorporating the more robust dipyrrometheneboron difluoride (BODIPY) fluorophore. A BODIPY-linked chromanol should have no intervening polar functional groups that might interfere with binding to the hydrophobic binding site...
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PMID: 20387845
PDF is available here.
PDF is available here.
Abstract
We summarize studies correlating B-rich diets or B-rich environments with regional risks of specific forms of cancers, and studies about the utilization of natural and synthetic B-containing compounds as anticancer agents. We review mechanisms where B-containing compounds interfere with the physiolo...
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PMID: 19912103
PDF is available here.
PDF is available here.
Abstract
The impact of immobilization of oxazaborolidines supported on silica via different substituents on the boron and nitrogen atoms is evaluated in the enantioselective reduction of acetophenone. The performances of the homogeneous analog oxazaborolidines and silica supported-ones are compared by varyin...
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PMID: 20657505
PDF is available here.
PDF is available here.
Abstract
The synthesis, photophysical properties, and a biological application of BODIPY-triazole 1 (BOT1) are described. BOT1 juxtaposes a BODIPY fluorophore with a tripodal ligand platform via a triazole bridge. The triazole linker is afforded by azide-alkyne "click" chemistry and comprises the third arm of...
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PMID: 20355724
PDF is available here.
PDF is available here.
Nanotechnology (21)16 2010
Abstract
We investigate the adsorption of the nucleic acid bases-adenine (A), guanine (G), cytosine (C), thymine (T) and uracil (U)-on the outer wall of a high curvature semiconducting single-walled boron nitride nanotube (BNNT) by first-principles density functional theory calculations. The calculated bindi...
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PMID: 20351402
PDF is available here.
PDF is available here.
Abstract
A boradiazaindacene (BODIPY) fluorophore with a chirality held on the central boron has been synthesized and the racemate resolved. Dissymetrization of the BODIPY core was obtained by oxidation of the 3-methyl group to the corresponding carboxaldehyde. A hydrogen bond between the aldehyde proton and...
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PMID: 20235590
PDF is available here.
PDF is available here.
Abstract
Our results indicate that doped half-bare ZBNNRs with an H-passivated B edge and a bare C edge generally have a spin-polarized ground state with the ferromagnetic spin ordering localized at the C edge, independent of the doping concentration and the ribbon width. In particular, doped half-bare ZBNNR...
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PMID: 20449344
PDF is available here.
PDF is available here.
Abstract
A resin-bonded overcasting restoration, which was made of silver-palladium-copper-gold alloy, was applied for one retention loss of the retainers of a maxillary anterior fixed partial denture using a metal conditioner and an adhesive resin luting agent. A resin-bonded overcasting restoration has bee...
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PMID: 20441045
PDF is available here.
PDF is available here.
Dental Materials Journal (29)2 2010
Abstract
This study evaluated the effects of metal primers on the bonding of adhesive resin to four pure metals (Au, Pd, Ag, Cu) and two noble alloys for porcelain fusing (high-gold and high-palladium content alloys). Bonding surface was polished with 600-grit silicon carbide paper and primed with one of the...
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PMID: 20379028
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1797)3 2010
Abstract
These results confirm a pivotal role of CYP3A4 oligomerization in its functional heterogeneity. Furthermore, the investigation of the initial phase of the kinetics of CYP3A4 reduction showed that the addition of NADPH causes a rapid low-to-high-spin transition in the CYP3A4-BMR complex, which is fol...
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PMID: 20026040
PDF is available here.
PDF is available here.
Abstract
The research on tetrahedral imidazolate frameworks takes on a new direction into the supramolecular area through the synthesis of three hydrogen-bonded boron imidazolate (B[im](4)(-)) frameworks (HBIFs) that show distinct three- and two-dimensional supramolecular architectures: (1) the ionic diamond...
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PMID: 20449407
PDF is available here.
PDF is available here.
Organic Letters (12)3 2010
Abstract
Diels-Alder reactions of various combinations of maleimides and 1,3-dienes with cationic oxazaborolidines as catalysts have been shown to be highly efficient and enantioselective.
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PMID: 20063859
PDF is available here.
PDF is available here.
Journal of Neuroscience (30)4 2010
Abstract
We sought to identify the conductance activated by leptin using whole-cell recording in EGFP-POMC neurons from transgenic mice. The TRPC channel blockers SKF96365 (1-[beta-[3-(4-methoxyphenyl)propoxy]-4-methoxyphenethyl]-1H-imidazole hydrochloride), flufenamic acid, and 2-APB (2-aminoethyl diphenylb...
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PMID: 20107083
PDF is available here.
PDF is available here.
Abstract
The present experimental study with the use of electron microscopy has shown that intake of sulfate mineral water (sulfate concentration: 2.2 g/l, mineralization: 3.9 g/l) by rats enhanced structural and functional reserves of their adrenocorticocytes. In contrast, intake of highly m...
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PMID: 21328898
PDF is available here.
PDF is available here.
Abstract
The synthesis of a series of new fluorescence labeled sphingolipids containing 4,4-difluoro-1,3,5,7-tetramethyl-4-bora-3alpha,4alpha-diaza-s-indacene-8-yl (Me4-BODIPY-8) group at omega-position of a fatty acyl residue is described. The obtained probes were used in studies of biological and model mem...
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PMID: 20823923
PDF is available here.
PDF is available here.
Cell Calcium (47)1 2010
Abstract
We identified two structurally isomeric 2-APB analogues that are 100-fold more potent than 2-APB itself. One of the 2-APB analogues activates and inhibits endogenous SOCE depending on the concentration while the other only inhibits it. The 2-APB analogue inhibits store depletion-mediated STIM1 clust...
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PMID: 19945161
PDF is available here.
PDF is available here.
Abstract
2-APB dose-dependently increased the ectopic activity of left atria at 1, 5, 10, 20, 50 microM. Anti-arrhythmic drugs, quinidine (10 microM), lidocaine (10 microM), verapamil (5 microM), and amiodarone (50 microM, 100 microuM) inhibited 2-APB-induced ectopic activity. 2-APB-induced ectopic activity...
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PMID: 20332623
PDF is available here.
PDF is available here.
Abstract
The aim of this study was to evaluate the influence of eugenol-containing endodontic sealers and luting strategy on the pull-out bond strength of glass fiber posts to dentin. Sixty-four bovine incisors were randomly assigned into two groups of 32 specimens each for obturation procedure with gutta-per...
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PMID: 21638962
PDF is available here.
PDF is available here.
Abstract
We show that unidentified compounds from Echinacea purpurea induce cytosolic Ca2+ elevation in non-immune-related cells, which lack CB2 receptors and that the Ca2+ elevation is not influenced by alkamides.
A non-immune human cell line, HEK293, was chosen to evaluate E. purpurea root extracts and con...
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PMID: 21092239
PDF is available here.
PDF is available here.
Abstract
We investigated the interactions of poly-l-lysine-coated BNNTs with C2C12 cells, as a model of muscle cells, in terms of cytocompatibility and BNNT internalization. The latter was performed using both confocal and transmission electron microscopy. Finally, we investigated myoblast differentiation in...
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PMID: 20463944
PDF is available here.
PDF is available here.
Journal of Oral Science (52)3 2010
Evaluation of thiouracil-based adhesive systems for bonding cast silver-palladium-copper-gold alloy.
Abstract
This study aimed to evaluate the effect of adhesive systems based on a thiouracil monomer on bonding to silver-palladium-copper-gold (Ag-Pd-Cu-Au) alloy (Castwell M.C.12). Disk specimens were cast from the alloy and then air-abraded with alumina. The disks were bonded using six bonding systems selec...
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PMID: 20881333
PDF is available here.
PDF is available here.
Endocrine Journal (57)2 2010
Abstract
We investigated the 2-aminoethoxydiphenyl borate (2APB)-sensitive pathway as one of the possible signaling pathways involved in [Ca(2+)](i) supply for ACTH-induced steroidogenesis. In monolayers of cultured rat adrenal fasciculate and reticularis cells, ACTH at 10(-11) M stimulated corticosterone sy...
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PMID: 19851032
PDF is available here.
PDF is available here.
Abstract
A catalytic enantioselective synthesis of the antimelanoma marine natural product (-)-palmerolide A was accomplished using a longest sequence of 21 steps and without resorting to stoichiometric chiral auxiliaries or the chiral pool. The right half was constructed with a new variant of the Claisen-Ir...
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PMID: 19764721
PDF is available here.
PDF is available here.
Abstract
Highly enantioselective rhodium-catalyzed addition of arylboroxines to N-phosphinoylaldimines was realized by the steric tuning of a diphenylphosphorus moiety to a di(o-tolyl)phosphorus moiety of a chiral amidomonophosphane. The presence of MS 4 A in a 5:1 solvent mixture of dioxane-propanol was ess...
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PMID: 19739616
PDF is available here.
PDF is available here.
Abstract
Deuterium kinetic isotope effect measurements upon enantiotopic methyl groups for the Corey-Bakshi-Shibata reduction of 2',5'-dimethylphenyl isopropyl ketone suggest a complex role for nonbonding interactions in the mediation of stereoselection.
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PMID: 19775183
PDF is available here.
PDF is available here.
Radiation Research (172)4 2009
Abstract
In boron neutron capture therapy, the absorbed dose from the (10)B(n,alpha)(7)Li reaction depends on the (10)B concentration and (10)B distribution in the irradiated volume. Thus compounds used in BNCT should have tumor-specific uptake and low accumulation in normal tissues. This study compares in a...
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PMID: 19772470
PDF is available here.
PDF is available here.
Journal of Organic Chemistry (74)19 2009
Abstract
N-Aryl, N-alkyl, N-alkoxy, and N-amino derivatives of 2-[bis(pentafluorophenyl)boryl]benzylideneamine were synthesized by the condensation reactions of 2-[bis(pentafluorophenyl)boryl]benzaldehyde with the corresponding amines. Their structures were investigated by NMR and X-ray crystallographic anal...
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PMID: 19778080
PDF is available here.
PDF is available here.
Journal of Organic Chemistry (74)19 2009
Abstract
A series of beta-formyl-BODIPYs 2 were synthesized in high yields from tetramethyl-BODIPYs 1 via the Vilsmeier-Haack reaction and were further functionalized using a Knoevenagel condensation to generate novel BODIPYs 3 and 4.
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PMID: 19722510
PDF is available here.
PDF is available here.
Abstract
A chemo-, regio-, and stereoselective iron-catalyzed 1,4-hydroboration of dienes that affords gamma-disubstituted allylboranes has been developed. 1,4-Hydroboration of 2-substituted dienes forms allylborane products with (E)-trisubstituted double bonds exclusively.
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PMID: 19702262
PDF is available here.
PDF is available here.
Abstract
Spirocyclic boronium ions based on the 9-bora-9,10-dihydroanthracene scaffold and substituted 2,2'-bipyridyl ligands have been prepared; these cations are shown to be convenient starting materials for the preparation of neutral radicals with significant spin density on boron.
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PMID: 20448975
PDF is available here.
PDF is available here.
Journal of Physical Chemistry B (113)35 2009
Abstract
The sol-to-gel transition was monitored via the use of time-resolved recording of the fluorescence emission of viscosity-sensitive probes. Two dyes were chosen for the study, water-soluble DASPMI and a hydrophobic BODIPY, and steady-state, time-resolved and time-tagged fluorescence measurements were...
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PMID: 19708714
PDF is available here.
PDF is available here.
Abstract
The first catalytic enantioselective conjugate boration of beta-substituted cyclic enones was developed to produce enantiomerically enriched tertiary organoboronates. The optimized asymmetric catalyst includes a QuinoxP*-CuO(t)Bu complex generated from CuPF(6)(CH(3)CN)(4) and LiO(t)Bu. In situ gener...
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PMID: 19653692
PDF is available here.
PDF is available here.
Nano Letters (9)9 2009
Abstract
We report here that multiwalled CNTs activate blood platelets by inducing extracellular Ca(2+) influx that could be inhibited by calcium channel blockers SKF 96365 and 2-APB. We also demonstrate platelet aggregating activity of different single-walled and multiwalled CNTs. In addition, we show that...
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PMID: 19736974
PDF is available here.
PDF is available here.
Current protocols in nucleic acid chemistry / edited by Serge L. Beaucage ... [et al.] (Chapter 4) 2009
Abstract
General methods for the synthesis of nucleosides modified with borane clusters and metallacarborane complexes are presented. These include: (1) the click chemistry approach based on Huisgen 1,3-dipolar cycloaddition and (2) tethering of the metallacarborane group to the aglycone of a nucleoside via...
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PMID: 19746357
PDF is available here.
PDF is available here.
Abstract
A mild ring opening of vinyl epoxides and aziridines with B(2)Pin(2) catalyzed by Ni(0)-Binap affords new functionalized allylic boron derivatives which undergo sequential transformations. The uncatalyzed allylation of aldehydes allows obtaining challenging bishomoallylic alicyclic 1,3-diols and 1,3...
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PMID: 19624120
PDF is available here.
PDF is available here.
Organic Letters (11)16 2009
Abstract
We also revealed solvent and temperature effects toward assembly and dis-assembly behavior of polymers....
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PMID: 19621922
PDF is available here.
PDF is available here.
Journal of Organic Chemistry (74)15 2009
Abstract
These results are important for the design of near-infrared absorbing azo dyes and suggest an efficient path for the preparation of near-infrared absorbing azo dyes by effectively enhancing pi-electron delocalization....
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PMID: 19572570
PDF is available here.
PDF is available here.
Cardiovascular Research (83)3 2009
Abstract
Whole-cell patch-clamp recordings showed outward-rectifying currents in human umbilical vein endothelial cells (HUVECs), which was potentiated by removing the extracellular Ca2+ and Mg2+, but inhibited by non-specific TRPM7 blocker Gd3+ or 2-aminoethoxydiphenyl borate (2-APB). TRPM7 mRNA was detecte...
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PMID: 19454490
PDF is available here.
PDF is available here.
Abstract
These results indicate that agonist-induced Ca(2+) oscillations in mouse small airway SMCs are primary mediated via IP(3)Rs and that tetracaine induces relaxation by both decreasing Ca(2+) sensitivity and inhibiting agonist-induced Ca(2+) oscillations via an IP(3)-dependent mechanism....
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PMID: 19465516
PDF is available here.
PDF is available here.
Abstract
We have tagged the lipid peroxidation substrate arachidonic acid and an electrophilic lipid, 15-deoxy-Delta(12,14)-prostaglandin-J2 (15d-PGJ2), with either biotin or the fluorophore BODIPY. Tagged arachidonic acid can be used in combination with conditions of oxidant stress or inflammation to assess...
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PMID: 19446632
PDF is available here.
PDF is available here.
Anesthesiology (111)2 2009
Abstract
After axotomy, ER Ca stores are reduced by anatomic loss and possibly diminished sarco-endoplasmic reticulum Ca-ATPase. The resulting disruption of Ca-induced Ca release and protein synthesis may contribute to the generation of neuropathic pain....
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PMID: 19602957
PDF is available here.
PDF is available here.
Abstract
We recently developed a phage-based system for the evolution of proteins in bacteria with expanded amino acid genetic codes. Here we demonstrate that the unnatural amino acid p-boronophenylalanine (BF) confers a selective advantage in the evolution of glycan-binding proteins. We show that an unbiase...
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PMID: 19555063
PDF is available here.
PDF is available here.
Abstract
Asymmetric 1,4-dihydroxylations of 1,3-dienes, and other transformations, are initiated by the Pt-catalyzed enantioselective addition of bis(pinacolato)diboron (B(2)(pin)(2)) to conjugated dienes. The studies reported in this communication suggest that both cyclic and acyclic substrates will partici...
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PMID: 19505078
PDF is available here.
PDF is available here.