Showing papers on "Derivative (chemistry) published in 2007"

Aromatic amine derivative and organic electroluminescence device using the same

Abstract: A aromatic amine derivative having an specific structure having a diphenyl amino group, and two or more of substituent bonding to benzene ring thereof, and in an organic electroluminescence device which comprises at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, at least one of the organic thin film layer comprises the aromatic amine derivative singly or a component for a mixture thereof. The organic electroluminescence device exhibiting a long lifetime and high current efficiency as well as emitting blue light with high color purity, and also the aromatic amine derivative for realizing the organic EL device are provided.

Improving spatial resolution of two-photon microfabrication by using photoinitiator with high initiating efficiency

Abstract: The lateral spatial resolution (LSR) in two-photon induced polymerization was improved to 80nm by using an anthracene derivative (9,10-bis-pentyloxy-2,7-bis[2-(4-dimethylamino-phenyl)-vinyl]anthracene (BPDPA)) as a highly sensitive and efficient photoinitiator. Photocurable resin containing 0.18mol% BPDPA exhibited a low polymerization threshold of 0.64mW at 800nm. Theoretical calculations showed that the LSR can be increased by reducing the laser power, indicating that the LSR could be improved using more sensitive initiators in the future.

Solution-Processible n-Channel Organic Field-Effect Transistors Based on Dicyanomethylene-Substituted Terthienoquinoid Derivative

Abstract: A new hybrid-type dicyanomethylene-substituted terthienoquinoid compound as a highly soluble n-channel organic semiconductor was synthesized, and its spin-coated thin film was utilized as an active semiconducting channel in field-effect transistors, which showed electron mobilities of up to 0.16 cm2 V-1 s-1.

A MADS Algorithm with a Progressive Barrier for Derivative-Free Nonlinear Programming

Abstract: We propose a new constraint-handling approach for general constraints that is applicable to a widely used class of constrained derivative-free optimization methods. As in many methods that allow infeasible iterates, constraint violations are aggregated into a single constraint violation function. As in filter methods, a threshold, or barrier, is imposed on the constraint violation function, and any trial point whose constraint violation function value exceeds this threshold is discarded from consideration. In the new algorithm, unlike the filter method, the amount of constraint violation subject to the barrier is progressively decreased adaptively as the iteration evolves. We test this progressive barrier (PB) approach versus the extreme barrier (EB) with the generalized pattern search (Gps) and the lower triangular mesh adaptive direct search (LTMads) methods for nonlinear derivative-free optimization. Tests are also conducted using the Gps-filter, which uses a version of the Fletcher-Leyffer filter approach. We know that Gps cannot be shown to yield kkt points with this strategy or the filter, but we use the Clarke nonsmooth calculus to prove Clarke stationarity of the sequences of feasible and infeasible trial points for LTMads-PB. Numerical experiments are conducted on three academic test problems with up to 50 variables and on a chemical engineering problem. The new LTMads-PB method generally outperforms our LTMads-EB in the case where no feasible initial points are known, and it does as well when feasible points are known. which leads us to recommend LTMads-PB. Thus the LTMads-PB is a useful practical extension of our earlier LTMads-EB algorithm, particularly in the common case for real problems where no feasible point is known. The same conclusions hold for Gps-PB versus Gps-EB.

Enantioselective Rauhut-Currier reactions promoted by protected cysteine.

Abstract: We report highly enantioselective examples of the Rauhut−Currier cycloisomerization reaction (the “vinylogous Morita−Baylis−Hillman reaction”). The reaction is highly practical and is catalyzed by a commercially available derivative of the proteinogenic amino acid cysteine. Reactions are conducted in the presence of potassium tert-butoxide and a critical concentration of water in bulk acetonitrile. A mechanistic model is advanced that may account for reaction selectivity that is predicated on organizational chelation of K ion in the product-determining step in which the Cys derivative undergoes elimination.

Nitrogen-containing heterocyclic derivative and organic electroluminescent device using same

Abstract: A novel nitrogen-containing heterocyclic derivative having a specific structure. An organic electroluminescence device comprises an organic thin-film layer which is disposed between a cathode and an anode and comprises one or more layers having a light emitting layer. At least one layer of the organic thin-film layer comprises the nitrogen-containing heterocyclic derivative. The organic electroluminescence device exhibits a high luminance and a high luminous efficiency even at a low driving voltage.

Synthesis and Photoinduced Phase Transitions of Poly(N-isopropylacrylamide) Derivative Functionalized with Terminal Azobenzene Units

Abstract: We have used an azobenzene derivative substituted with a 2-chloropropionyl group as an initiator for the atom transfer radical polymerization of N-isopropylacrylamide. The resulting polymers, which...

On q–Analogues of Caputo Derivative and Mittag–Leffler Function

Abstract: Based on the fractional q–integral with the parametric lower limit of integration, we consider the fractional q–derivative of Caputo type. Especially, its applications to q-exponential functions allow us to introduce q–analogues of the Mittag–Leffler function. Vice versa, those functions can be used for defining generalized operators in fractional q–calculus. Mathematics Subject Classification: 33D60, 33E12, 26A33

Synthesis and characterization of the Keggin-type ruthenium-nitrido derivative [PW11O39{RuN}]4- and evidence of its electrophilic reactivity.

Abstract: The ruthenium-nitrido POM derivative [PW11O39{RuVIN}]4- has been synthesized by reaction between [PW11O39]7- and [RuVINCl5]2- or [RuVINCl4]-. Its molecular structure has been confirmed from multinuclear 31P and 183W NMR spectroscopy together with an EXAFS study, while the oxidation state of the ruthenium bearing the nitrido ligand has been inferred both from 183W NMR and XANES analysis at the Ru-K edge. The potential of [PW11O39{RuVIN}]4- in N-atom transfer reactions has been demonstrated through reaction with triphenylphosphine, which ultimately leads to the release of the bis(triphenylphosphane)iminium cation [PPh3NPPh3]+ through several intermediates, among which the phosphoraniminato derivative [PW11O39{RuVNPh3}]3- has been structurally characterized. Its unusual oxidation state is in accordance with its EPR spectrum.

Bicyclic heterocyclic compounds as fgfr inhibitors

Abstract: The invention relates to new bicyclic heterocyclic derivative compounds, to pharmaceutical compositions comprising said compounds and to the use of said compounds in the treatment of diseases, e.g. cancer.

Functionalization of corroles: the nitration reaction.

Abstract: The reaction of meso-triarylcorroles with AgNO2 proceeds with concomitant metalation and peripheral substitution to give the corresponding nitro-substituted silver(III) corrole complex. The substitution is highly regioselective, giving only the corresponding 3-nitro derivative, among the different possible isomers. The results obtained indicate that the reaction intermediate is the π-cation radical of the complex, which is then attacked by nitrite ion. This was proven by the reaction of the copper corrole complexes with NaNO2: in this case, the nitration reaction proceeded without the addition of an oxidant, because of the π-cation radical character of the copper complex. The reaction is also successful in the case of 2,3,17,18-tetraethyl-8,12-diacetoxymethyl-7,13-dimethylcorrole (AMCorH3), with the formation of the meso-substituted silver corrole derivative (NO2)3AMCorAg (fully characterized by X-ray crystallography), the first of its kind to be reported. Two of the corroles are characterized by cyclic ...

Synthesis and Functionalization of Germanium Triphenylcorrolate: The First Example of a Partially Brominated Corrole

Abstract: Ge complexes of 5,10,15-triphenylcorrole were prepared in refluxing dry DMF using GeCl4 as the source of Ge. Chromatographic separation of the crude reaction mixture afforded the μ-oxo dimer 1 and the methoxy derivative 2a. The corresponding chloride 2b can be obtained by treatment of 1 or 2a with HCl. The reaction of 2a with Br2 in CHCl3/py afforded the hexabromo derivative 3 as the main product, giving the first indication of the regioselective substitution of pyrroles B and C on the corrole ring. The fully brominated open-chain tetrapyrrole 4 was also characterized as a reaction by-product. Different partially brominated Ge complexes 5 and 6 have been obtained by variation of reaction conditions, while the heptabromo derivative was obtained in a mixture with the corresponding fully brominated Gecorrole. Photophysical characterization of Ge corrolates confirmed the high fluorescence quantum yield of such complexes, and also led to the first observation of phosphorescence emissions from corrole complexes. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

1,2-benzisothiazole derivative, and agricultural or horticultural plant disease-controlling agent

Abstract: [Task] The present invention is to provide a 1,2-benzoisothiazole derivative or a salt thereof which is not harmful to a crop and is remarkably effective on an agricultural or horticultural plant disease such as Pyricularia oryzae, Septoria nodorum, Pseudoperonospora cubensis and Colletotrichum orbiculare, and, an agricultural or horticultural plant disease-controlling agent containing the derivative or its salt as an active ingredient. [Means] A 1,2-benzoisothiazole derivative represented by the general formula [I] (wherein R 1 is a hydrogen atom or a halogen atom, and R 2 is a methyl group or a halogen atom), or a salt thereof.

Novel anthracene derivative and organic electronic device using the same

Abstract: The present invention provides a novel anthracene derivative and an organic electronic device using the same. The organic electronic device according to the present invention shows excellent characteristics in efficiency, drive voltage, and life time.

Effects of protonation and metal coordination on intramolecular charge transfer of tetrathiafulvalene compound.

Abstract: A protonated bifunctional pyridine-based tetrathiafulvalene (TTF) derivative (DMT−TTF−pyH)NO3 and a copper(II) complex Cu(acac)2(DMT−TTF−py)2 have been obtained and studied. Electronic spectra of the protonated compound show a large ICT (intramolecular charge transfer) band shift (Δλ = 136 nm) compared with that of the neutral compound. Cyclic voltammetry also shows a large shift of the redox potentials (ΔE1/2(1) = 77 mV). Theoretical calculation suggests that the pyridium substituent is a strong π-electron acceptor. Crystal structures of the protonated compound and the metal complex have been obtained. The dihedral angle between least-squares planes of the pyridyl group and the dithiole ring might reflect the intensity of the ICT effect between the TTF moiety and the pyridyl group. It is also noteworthy that the TTF moiety could be oxidized to TTF2+ dication by Fe(ClO4)3·6H2O when forming a metal complex, while the protonated TTF derivative can only be oxidized to the TTF•+ radical cation by Fe(ClO4)3·6H...

Pesticidal composition comprising a pyridylethylbenzamide derivative and an insecticide compound

Abstract: A composition comprising at least a pyridylmethylbenzamide derivative of general formula (I) (A) and an insecticide compound (B) in a (A) / (B) weight ratio of from 1/1000 to 1000/1; a composition further comprising an additional fungicidal compound and a method for preventively or curatively combating the pests and diseases of crops by using this composition.

Isoxazoline derivative, pest-controlling agent, and use of the pest-controlling agent

Abstract: [PROBLEMS] To provide a novel pest-controlling agent, particularly an agricultural and horticultural insecticide, which is effective against pests having resistance to already-existing pesticides and which is suitable for labor-saving application by aged agricultural workers. [MEANS FOR SOLVING PROBLEMS] A pest-controlling agent comprising an isoxazoline derivative represented by the general formula (I) or a salt thereof as an active ingredient. (I) wherein R1 represents a hydrogen atom, a halogen atom, a (C1-C6) alkyl group or the like; R2 represents a halo(C1-C6) alkyl group; W represents an oxygen atom, a sulfur atom or the like; A1, A2 and A3 independently represent a nitrogen atom, C-H or C-Y; X represents a halogen atom, a cyano group, a nitro group or the like; m represents an integer ranging from 1 to 5; Y represents a halogen atom, a cyano group, a nitro group or the like; n represents an integer ranging from 0 to 4; and Z represents a halogen atom, a cyano group, a nitro group or the like.

Anthocyanone A: A Quinone Methide Derivative Resulting from Malvidin 3-O-Glucoside Degradation

Abstract: A new compound resulting from the oxidative degradation of maldivin 3-O-glucoside under acid conditions was detected in a wine model solution stored under 90 and 25 degrees C. It was isolated by semipreparative HPLC, and its structure was elucidated by UV-vis spectra, mass spectrometry (LC/MS), and NMR spectroscopy (1-D and 2-D). The compound was identified as 8-beta-d-glucopyranosyl-2,4-dihydroxy-6-oxo-cyclohexa-2,4-dienyl acetic acid (anthocyanone A), which results from nucleophilic attack of hydrogen peroxide to maldivin 3-O-glucoside through a Baeyer-Villiger oxidation followed by other oxidations steps.