A short and efficient synthesis of bis(1-methylcyclopropyl)ketone ({=6}) via the spiro-acetal {=4} from α-methyl-γ-butyrolactone ({=1}) been found, and reductive dimerization of {=6} by McMurry coupling yields tetrakis(1-methylcyclopropyl)ethylene ({=7}) in competition with ring-opened product...
The microwave spectrum of α-methyl-γ-butyrolactone has been examined in the frequency region 18.0–40.0 GHz. Transitions in the ground and four excited states have been assigned for a ring-twisted-like conformation species in which the methyl group is in the equatorial position. Internal rotat...
RAFT ab initio emulsion copolymerization of γ-methyl-α-methylene-γ-butyrolactone (MeMBL) and styrene with various monomer ratios was investigated with PAA20-PS5 trithiocarbonate being mediator and surfactant at 70 °C. The polymerization was fully controlled as evidenced by stable latexes, we...
The cooperative effect of the camphor imine ligand (YNC10H14O) in the cyclization of 5-hexyn-1-ol and 4-pentyn-1-ol promoted by complexes trans-[MCl2(YNC10H14O)2] (M = Pd, Y = NH2, NHMe, NMe2, OH, Ph; Pt, Y = NH2, NHMe, NMe2) is established from a direct relation between the constants calculated...
The palladium-catalyzed reaction of 3-acetyl-5-hexyn-2-one with aryl iodides under a carbon monoxide atmosphere produces different 2,3,5-trisubstituted furans depending on the alkyne/aryl iodide ratio.
A convenient and efficient catalytic procedure for the selective S-arylation of 2-thioxoimidazolidin-4-ones to give novel S-aryl substituted 2-thiohydantoins under mild reaction conditions using arylboronic acids is described. The anticancer activity of the compounds were evaluated in vitro.
Copper nanoparticles (Cu NPs) were prepared by in situ reduction of CuSO4·5H2O using ellagic acid (EA) as the reducing agent as well as stabilizer and its catalytic activity is tested in the oxidative hydroxylation of phenylboronic acids to phenol without any added base or ligand. The synthesiz...
Herein is reported an innovative and reproducible systemic approach for the fabrication of customized 3D hollow microspheres of polyvinyl alcohol (PVA) based on the use of aromatic boronic acids (ABAs) as crosslinkers. A dedicated experimental set-up was developed to enable microsphere formulati...
We have developed two general methods for the C–N cross-coupling of phenylboronic acids with amines using solid copper flow reactors, in combination with an oxidant. We have developed one method for a C–N arylation reaction which employs a solid copper coil reactor, in combination with tert-bu...
Electrochemical methodology offers an interesting alternative to the classical synthesis of organoboronic derivatives. A series of aryl- allyl- and benzylboronic acids and esters has been prepared via an electrosynthesis methodology, which uses a single compartment cell fitted with a metal anode...
A simple and efficient copper-catalyzed method for the synthesis of aromatic carboxylic acids in moderate to high yields with great functional-group compatibility in the substrates has been developed. The new method uses readily available arylboronic acids and acetyl acetate as the starting mate...
A simple method is reported for the synthesis of alkylaminophenols in moderate to good yields via a three-component, catalyst-free decarboxylative coupling of proline with salicylaldehyde and boronic acids.
An in-situ generated cationic Pd(II)/bipyridine-catalyzed conjugate addition of arylboronic acids to α,β-unsaturated carboxylic acids in water was developed and optimized. For most substrates, nearly quantitative yields were given, and the products can be purified by simple washing without col...
The sensitivity of a stable isotope dilution assay for 4-methoxy-2-methyl-2-butanethiol (MMB) causing the blackcurrant-like odour in olive oils was improved. After spiking the oil sample with labelled MMB, the thiols were separated from the volatile fraction with an immobilized reagent for thiol...
n-Butylcyclohexane was photo-oxidized by solar light on synthetic seawater containing traces of anthraquinone. After identification of the main photoproducts formed, it appeared that the photochemical processes acted essentially on the carbons of the cycle, leading in the case of the secondary c...
We studied the pyrolysis of n-butylcyclohexane at high pressure (100 bar) in a gold sealed tube reactor between 300 and 425 °C. The conversion obtained was between 3% and 99%. Pyrolysis led to 3 main chemical classes of products: (a) n-alkanes (methane, ethane, propane and butane), (b) naphthen...
A detailed kinetic model consisting of 833 reactions has been developed to describe the thermal cracking of n-butylcyclohexane at high pressure (100 bar). A primary mechanism was written in an exhaustive manner whereas a partial secondary mechanism was considered to describe the formation and th...
Ignition delay times were measured behind reflected shock waves for cyclohexane, methylcyclohexane, and n-butylcyclohexane at 1.5 and 3 atm, equivalence ratios near 1 and 0.5, and temperatures between 1280 and 1480 K. The observed ignition delay times can be summarized as follows: methylcyclohex...
n-Butylcyclohexane, a possible surrogate component for petroleum- and coal-derived jet fuels, was oxidized in a flow reactor through the low temperature region from 600 to 820 K while other inlet conditions were held constant (0.8 MPa pressure, 0.120 s residence time, and 0.38 equivalence ratio)...
Cycloalkanes with long alkylic side chains are important chemical components in diesel and jet fuels. Although with the increasing interest in their combustion chemistry, related studies are very limited. In the present study, ignition delay times were measured for n-butylcyclohexane by combinin...
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