Showing papers on "Alkoxy group published in 2005"

Isoxazoline-substituted benzamide compound and noxious organism control agent

Abstract: An isoxazoline-substituted benzamide compound of the general formula: (1) [wherein each of A1, A2 and A3 independently represents a carbon atom or nitrogen atom; G a benzene ring, etc.; W an oxygen atom or sulfur atom; X a halogen atom, C1-C6 haloalkyl, etc.; Y a halogen atom, C1-C6 alkyl, etc.; R1 an, arbitrarily substituted with R16, C1-C12 alkyl, C3-C12 alkenyl, -N(R20)R19, etc.; R2 a hydrogen atom, (C1-C4)alkoxy(C1-C4)alkyl, etc.; R3 a C1-C6 haloalkyl, etc.; R16 a halogen atom, cyano, phenyl substituted with (Z)p1, D-1 to D-60, E-1 to E-49, etc.; R19 a phenyl, phenyl substituted with (Z)p1, etc.; R20 a hydrogen atom, C1-C6 alkyl, etc.; Z a halogen atom, nitro, C1-C6 alkoxy, etc.; D-1 to D-60 a 5- or 6-membered aromatic heterocycle; E-1 to E-49 a 5- or 6-membered saturated heterocycle; m an integer of 0 to 5; n an integer of 0 to 4; and p1 an integer of 1 to 5], or a salt thereof. Further, there is provided a noxious organism control agent comprising any of these compounds.

Chemical modification of titanium alkoxides for sol–gel processing

Abstract: The chemical modification of titanium alkoxides by alkoxy- and aminoalcohols, s-diketones, s-ketoesters, carboxylic and phosphonic acids, and related compounds, and the hydrolysis behavior of the organically modified precursors are reviewed Special focus is put on structural aspects and on the possibility to introduce functional organic groups Such precursors have a high potential for innovative materials syntheses because they permit control of the precursor reactivity in sol–gel processes and the preparation of titania-based inorganic–organic hybrid materials Coordination, solvation, aggregation and redistribution equilibria play an important role in the chemistry of the modified titanium alkoxides, and organic side reactions have to be taken into account

Alkyne Hydrosilylation Catalyzed by a Cationic Ruthenium Complex: Efficient and General Trans Addition

Abstract: The complex [Cp*Ru(MeCN)3]PF6 is shown to catalyze the hydrosilylation of a wide range of alkynes. Terminal alkynes afford access to α-vinylsilane products with good regioselectivity. Deuterium labeling studies indicate a clean trans addition process is at work. The same complex is active in internal alkyne hydrosilylation, where absolute selectivity for the trans addition process is maintained. Several internal alkyne substrate classes, including propargylic alcohols and α,β-alkynyl carbonyl compounds, allow regioselective vinylsilane formation. The tolerance of a wide range of silanes is noteworthy, including alkyl-, aryl-, alkoxy-, and halosilanes. This advantage is demonstrated in the direct synthesis of triene substrates for silicon-tethered intramolecular Diels−Alder cycloadditions.

Stereoselective C-Glycosylation Reactions of Ribose Derivatives: Electronic Effects of Five-Membered Ring Oxocarbenium Ions

Abstract: The factors controlling the highly α-selective C-glycosylation of ribose derivatives were determined by examining the stereoselective reactions of 18 ribose analogues differing in substitution at C-2, C-3, and C-4. The lowest energy conformers of the intermediate oxocarbenium ions display the C-3 alkoxy group in a pseudoaxial orientation to maximize electrostatic effects. To a lesser extent, the C-2 substituent prefers a pseudoequatorial position, and the alkyl group at C-4 has little influence on conformational preferences. In all cases, the product was formed by stereoelectronically preferred inside attack on the lowest energy conformer.

Synthesis and Characterization of Covalently Functionalized Laponite Clay

Abstract: Covalently functionalized Laponite clay was synthesized through a condensation reaction of the clay's silanol groups with mono- and trifunctional alkoxy silanes. Most of the work focuses on primary-amine-containing modifications because that group offers a wide range of derivitization options. Various 3-aminopropyltrimethoxy silane (APS) treatments yielded 4−14 wt % of organic material bound to the clay. APS-treated clay was further reacted to yield attached methacrylate, benzophenone, and tertiary bromine groups capable of polymerization, photoinitiation, and atom transfer radical polymerization initiation, respectively. Studies using a monoalkoxy analogue of APS, aminopropyldimethylethoxysilane (APES), are consistent with the hypothesis that multifunctional alkoxy silanes can cause the clay sheets to link together, hindering the clay's dispersibility and the efficiency of subsequent surface ion-exchange reactions. The attached amines were further reacted to 40 and 80% conversion in the APS- and APES-tre...

Cyclic diol-derived blocked mercaptofunctional silane compositions

Abstract: Diol derived blocked mercaptofunctional silane compositions in which the silanes comprise cyclic and bridged alkoxy groups derived from hydrocarbon-based diols and processes for their preparation are provided. Also provided are rubber compositions comprising the cyclic diol-derived blocked mercaptofunctional silanes, processes for their preparation and articles of manufacture comprising the rubber compositions, in particular, automotive tires and components thereof.

Organic electroluminescent device

Abstract: Disclosed is an organic electroluminescent device comprising a light-emitting layer arranged between an anode and a cathode, and a layer (L) arranged between the light-emitting layer and the anode and containing a polymer compound having a repeating unit represented by the following formula (1) (In the above formula, Ar1, Ar2, Ar3 and Ar4 independently represent an arylene group or a divalent heterocyclic group; E1, E2 and E3 independently represent an aryl group (A) or heterocyclic group (B) specified below; and a and b independently represent 0 or 1 while satisfying 0 <= a + b <= 1 Aryl group (A): an aryl group having three or more substituents selected from alkyl groups, alkoxy groups or the like Heterocyclic group (B): a monovalent heterocyclic group having one or more substituents selected from alkyl groups, alkoxy groups or the like wherein the sum of the number of substituents and the number of heteroatoms is not less than 3)

Quinoxalin-2-one derivatives crop protection agents comprising the same and method for production and use therof

Abstract: The invention relates to compounds of formula (I), or the salts thereof, where X = O or S, (Y)n = n substituted Y, n = 0, 1, 2, 3 or 4, R1 = H, OH, NH2, C1-C4 alkylamino, di-[C1-C4 alkyl]amino or optionally substituted C1-C10 alkyl, C3-C10 alkenyl, C3-C10 alkinyl or C1-C10 alkoxy, C3-C10 cycloalkyl, C4-C10 cycloalkenyl, aryl or heterocyclyl, R2 = H, or optionally substituted C1-C10 alkyl, C3-C10 alkenyl, C3-C10 alkinyl, C3-C10 cycloalkyl, C4-C10 cycloalkenyl, aryl or heterocyclyl, whereby Y is as defined in claim 1, which are suitable as safeners for cultured plants or crops against the phytotoxic effects of agrochemicals, such as pesticides, on said plants.

Highly Conductive, Regioregular Alkoxy-Functionalized Polythiophenes: A New Class of Stable, Low Band Gap Materials

Abstract: Presented here is the synthesis and unique physical properties for a new class of highly processable regioregular poly(3-alkoxy-functionalized thiophenes). These polymers exhibit high electrical conductivities with very good stabilities (over 3 years) when doped with iodine vapor followed by exposure to ambient conditions.

Self-assembly of designed oligomeric siloxanes with alkyl chains into silica-based hybrid mesostructures

Abstract: A novel self-assembly route to ordered silica-organic hybrids using well-defined siloxane oligomers with alkoxy functionality and covalently attached alkyl chains has been investigated. Various hybrid mesostructures were obtained by hydrolysis and polycondensation without the use of any structure-directing agents. The oligomers 1(Cn), having an alkylsilane core and three branched trimethoxysilyl groups, formed highly ordered lamellar phases when n = 14-18, while those with shorter alkyl chains formed cylindrical assemblies, slightly distorted two-dimensional (2D) hexagonal structures (n = 6-10), and a novel 2D monoclinic structure (n = 12). Furthermore, the mixtures of 1(Cn) with different chain lengths yielded well-ordered 2D hexagonal phases, possibly due to the better packing of the precursors. The hybrids consisting of cylindrical assemblies were converted to ordered porous silica with tunable pore sizes upon calcination to remove organic groups. The liquid-state 29Si NMR analysis of the hydrolysis and polycondensation processes of 1(Cn) revealed a unique intramolecular reaction yielding primarily the oligomer with a tetrasiloxane ring which is a new class of amphiphilic molecule having both self-assembling ability and high cross-linking ability. We also found that the mesostructure (lamellar or 2D hexagonal) was strictly controlled by varying the number of siloxane units per alkyl chain. These results provide a deeper understanding of the present self-assembly process that is strongly governed by the molecular packing of oligosiloxane precursors.

Working fluids for thermal energy conversion of waste heat from fuel cells using rankine cycle systems

Abstract: A process for recovering waste heat which comprises: (a) passing a liquid phase working fluid through a heat exchanger in communication with a process which produces the waste heat; (b) removing a vapor phase working fluid from the heat exchanger; (c) passing the vapor phase working fluid to an expander, wherein the waste heat is converted into mechanical energy; and (d) passing the vapor phase working fluid from the expander to a condenser, wherein the vapor phase working fluid is condensed to the liquid phase working fluid. The preferred working fluid is an organic Rankine cycle system working fluid comprising one or more compounds of Formula (I) (I) CR'y, wherein y is 3 or 4 and each R' is independently H, F, I, Br, substituted or unsubstituted C3 - C9 alkyl, substituted or unsubstituted C2-C9 alkoxy, substituded or unsubstituted fluoropolyether, substituted or unsubstituted C2-C9 alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted C6-C9 alkylaryl, or substituted or unsubstituted C6-C9 alkenyaryl, provided said compound includes at least two carbon atoms, at least one fluorine atom, and no chloride atoms, and further provided that any OH substituted alkyl preferably has at least three carbon atoms.

New bidentate alkoxy-NHC ligands for enantioselective copper-catalysed conjugate addition

Abstract: Chiral alkoxy-imidazolinium salts are easily available via a five-step procedure starting from β-aminoalcohols. This new family of alkoxy-N-heterocyclic carbene (NHC) precursors is shown to be highly active in the enantioselective copper-catalysed conjugate addition to cyclic enones. Complete conversion with low catalyst loading and good enantiomeric excesses up to 93% were obtained at room temperature.

An ethoxy intermediate in ethanol dehydration on Brønsted acid sites in zeolite.

Abstract: Acid-catalyzed ethanol dehydration on zeolite is shown to proceed via a covalent ethoxy group (C2H5O) as a stable intermediate, which was directly observed by IR spectroscopy.

Structural evidence that alkoxy substituents adopt electronically preferred pseudoaxial orientations in six-membered ring dioxocarbenium ions

Abstract: Nucleophilic substitution reactions of monosubstituted tetrahydropyran acetals give opposite selectivities when a remote alkyl or alkoxy substituent is present at C-4. Coupled with earlier computational reports on the intermediates of glycosylation reactions, these results are consistent with the preference for the oxocarbenium ion intermediate derived from alkoxy-substituted tetrahydropyran acetals to occupy a pseudoaxial conformation. Theoretical, spectroscopic, and X-ray crystallographic evidence of this conformational preference in an analogous and more stable dioxocarbenium ion are provided. This contrasteric preference for an axial orientation of an alkoxy substituent likely derives from the electronically favored pseudoaxial orientation of remote electronegative substituents in neutral six-membered rings possessing electron-deficient carbon atoms.

2-alkoxy-6-alkyl-phenyl-substituted spirocyclic tetramic acid derivatives

Abstract: The invention relates to the novel 2-halogen-6-alkyl-phenyl substituted spirocyclic tetramic acid derivatives of formula (I), wherein A, B, G, X, Y and Z are defined as above. The invention also relates to several methods and intermediate products for producing the same and to their use as pesticides and/or herbicides, and to selective herbicides that contain 2-halogen-6-alkyl-phenyl substituted spirocyclic tetramic acid derivatives of formula (I) and at least one compound that improves cultivated plant tolerance.

Organic light emitting device

Abstract: PROBLEM TO BE SOLVED: To provide an electrochemical light emitting device (ECL device) with stable light emission and high light emitting luminance by using a ring-aggregated hydrocarbon compound wherein a specific polyaromatic series is substituted for a luminescent material. SOLUTION: This organic light emitting device has a device structure wherein a luminescent solution containing the luminescent material and a solvent is sandwiched between a pair of electrodes. As the luminescent material, the polyaromatic series ring-aggregated hydrocarbon compound represented by a constitutional formula (1) (Where, R 1 and R 2 are a hydrogen atom or a halogen atom and a lower alkyl group or a lower alkoxy group, R 3 and R 6 are hydrogen and a substituted or non-substituted phenyl group. R 4 and R 5 are substituted or non-substituted phenyl groups. R 1 and R 2 may combine together to form a ring structure, and adjoining R 4 and R 3 or R 4 and R 5 may combine together to form a ring structure.) is used. COPYRIGHT: (C)2006,JPO&NCIPI

Oxidative activation of n-butane on sulfated zirconia.

Abstract: Catalytic activation and conversion of light alkanes by sulfated zirconia is unequivocally shown to be initiated by producing small concentrations of olefins. This occurs via stoichiometric oxidative dehydrogenation of butane by SO3 or pyrosulfate groups to butene (present mostly as alkoxy groups), water, and SO2. Thermal desorption and in situ IR spectroscopy have been used to determine all three reaction products. The concentration of butene formed determines both the catalytic activity of sulfated zirconia as well as the deactivation via formation of oligomers. The thermodynamics of the oxidative dehydrogenation of n-butane by different SZ surface structures has been examined by density functional (DFT) calculations. The calculations show that pyrosulfate or re-adsorbed SO3 species have the highest oxidizing ability.

3-(dihydro(tetrahydro)isoquinolin-1-yl)quinolines

Abstract: A compound is provided which is useful as an active ingredient of an agricultural chemical having superior antimicrobial activity against various plant diseases and capable of controlling rice blast and so on at a low dose. A compound or salt thereof represented by the following general formula: (wherein, R 1 and R 2 represent a C 1 -C 6 alkyl group, aryl group, heteroaryl group, aralkyl group or R 1 and R 2 together represent a C 3 -C 10 cycloalkyl group, R 3 and R 4 represent a hydrogen atom, a C 1 -C 6 alkyl group or R 3 and R 4 together represent a C 3 -C 10 cycloalkyl group, R 5 represents a hydrogen atom, C 1 -C 6 alkyl group or acyl group, X represents a halogen atom, a C 1 -C 6 alkyl group, C 2 -C 6 alkenyl group, C 2 -C 6 alkynyl group, aryl group, heteroaryl group, C 1 -C 6 alkoxy group, amino group, acyl group, cyano group or N-hydroxyalkaneimidoyl group, Y represents a substituent selected from the group consisting of a halogen atom, C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group and hydroxyl group, n represents an integer of 0 to 4, and m represents an integer of 0 to 6).

Heterogenization of Organometallic Molybdenum Complexes with Siloxane Functional Groups and their Catalytic Application

Abstract: η5-CpMo(CO)3R complexes containing siloxane functional groups [(CH2)3Si(OMe)3 or (CH2)Si(OEt)3] attached to either the cyclopentadiene ligand or directly to Mo were grafted on the mesoporous materials MCM-41 and MCM-48 by reaction of the OR (R=Me, Et) moieties in the silane ligand and surface silanol groups (Si-OH). For the sake of comparison mesoporous materials modified with silane groups were reacted with Na+[CpMo(CO)3]−. The XRD, N2 adsorption-desorption, and TEM analyses provide strong evidence that the mesoporous structure of the supporting material retains its long-range ordering throughout the grafting process, despite significant reductions in surface area, pore volume and pore size. The appearance of strong IR bands around 2016 and 1956 cm−1 on the grafted samples also shows that the η5-CpMo(CO)3R complexes have been successfully grafted. Elemental analysis reveals that the grafted samples contain 0.3–3.5 wt % Mo. 29Si CP MAS-NMR spectra give clear evidence for a reduction in the numbers of the Q3 and Q2 sites. The formation of new peaks around −49.8, −57.9, and −66.2 ppm (T1, T2, and T3) indicates esterification of silanol groups by the alkoxy groups of the silane ligand. Both the in situ and ex situ prepared samples show good catalytic activity for the epoxidation of cyclooctene.

Molecular manipulation of two- and three-dimensional silica nanostructures by alkoxysilylation of a layered silicate octosilicate and subsequent hydrolysis of alkoxy groups.

Abstract: A novel methodology for constructing molecularly ordered silica nanostructures with two-dimensional (2-D) and three-dimensional (3-D) networks has been developed by using a stepwise process involving silylation of a layered silicate octosilicate with alkoxytrichlorosilanes [ROSiCl3, R = alkyl] and subsequent reaction within the interlayer spaces. Alkoxytrichlorosilanes react almost completely with octosilicate, bridging two closest Si−OH (or −O-) sites on the silicate layers, to form new five-membered rings. The unreacted functional groups, Si−Cl and Si−OR, are readily hydrolyzed by the posttreatment with a water/dimethyl sulfoxide (DMSO) or water/acetone mixture, leading to the formation of two types of silicate structures. The treatment with a water/DMSO mixture produced a unique crystalline 2-D silicate framework with geminal silanol groups, whereas a water/acetone mixture induced hydrolysis and subsequent condensation between adjacent layers to form a new 3-D silicate framework. The 2-D structure is r...

Thermal behavior of schiff bases from chitosan

Abstract: Solid methyl esters of saturated fatty acids can cause technological problems when modified vegetable oils are used at low temperatures. In this work the effect of adding tailored substances to lower the crystallization temperature ( T c ) of methyl hexadecanoate (PalMe) was studied. These substances were esters of carboxylic acids with linear or branched alkyl chains of up to 16 carbon atoms with alcohols having cyclic or branched alkyl chains or an alkoxy group. Results of DSC measurements have shown that the crystallization temperature of PalMe could be decreased by 10°C depending on the molecular mass, molecular structure and concentration of the additive. The best results were obtained using hexadecanoic acid derivatives.

Synthesis of stable dodecaalkoxy derivatives of hypercloso-B12H12.

Abstract: The scope and limitations of the alkylation of [closo-B12(OH)12]2- using a series of fourteen alkyl and aralkyl halides and two p-toluenesulfonic acid esters in the presence of N,N-diisopropylethylamine have been investigated. The dodecaalkoxy-closo-dodecaborate products, [closo-B12(OR)12]2-, and their hypercloso two-electron oxidation products have been explored. The species [closo-B12(OR)12]2- containing 26 cage-bonding electrons may undergo two reversible, sequential, one-electron oxidation processes, producing a 25-electron radical anion and a 24-electron neutral species. Several oxidizing reagents were investigated for the chemical oxidation of [closo-B12(OR)12]2- and [hypercloso-B12(OR)12]- to [hypercloso-B12(OR)12]. Both FeCl3.6H2O and K3Fe(CN)6 in 90/5/5 ethanol/acetonitrile/H2O were found to be the reagents of choice. The reverse reaction leading from the neutral species to the radical anion and subsequently to the dianion was achieved using sodium borohydride in ethanol. A variety of alkoxyl derivatives have been synthesized by heating the reactants for extended periods of time in acetonitrile at the reflux temperature. The use of elevated reaction temperatures attained by employing moderate argon pressure (autoclave) over the reaction mixture led to drastic reductions in reaction times and increased efficiency. X-ray diffraction studies of substituted dodecabenzyl ether derivatives proved that 2(2-) has approximate Ih symmetry while hypercloso-2, -3, -9, -11, -12, and -13 have approximate D3d point group symmetry due to Jahn-Teller distortion from Ih.

Negative resist composition and resist pattern forming method

Abstract: PROBLEM TO BE SOLVED: To provide a chemically amplified negative resist composition giving a favorable pattern profile, and to provide a resist pattern forming method. SOLUTION: The negative resist composition contains a resin component (A) and an acid generator component (B) which generates an acid upon exposure: wherein the resin component (A) contains a resin component (A1) having a structural unit (a1) containing an alcyclic group having a fluorinated hydroxyalkyl group and a structural unit (a2) derived from an acrylic acid ester and containing a hydroxyl group-containing alcyclic group; and the acid generator component (B) contains an acid generator (B1) expressed by general formula (B1). In formula (B1), R 51 represents a straight chain, branched chain or cyclic alkyl group or fluoroalkyl group; R 52 represents a hydrogen atom, hydroxyl group, halogen atom, straight chain or branched chain alkyl group, halogenated alkyl group or alkoxy group; R 53 represents an aryl group which may have a substituent; and n represents an integer of 1 to 3. COPYRIGHT: (C)2007,JPO&INPIT

3'-alkoxy spirocyclic tetramic and tetronic acids

Abstract: The invention relates to novel 3'-alkoxy spirocyclic tetramic and tetronic acids of formula (I), wherein A, B, D, Q1, Q2, G, W, X, Y and Z are as defined in the description, to several methods and intermediate products for the production and the use thereof in the form of pesticides and/or herbicides and/or microbicides, to selective herbicide agents, 3'-alkoxy spirocyclic tetramic and tetronic acids and to at least one compound which improves cultivated plants compatibility.