136-60-7Relevant articles and documents
Copper-catalyzed oxidative esterification of alcohols with aldehydes activated by Lewis acids
Yoo, Woo-Jin,Li, Chao-Jun
, p. 1033 - 1035 (2007)
An efficient oxidative esterification of aromatic and aliphatic aldehydes with simple alcohols was accomplished using catalytic amounts of Cu(ClO4)2·6H2O and InBr3 with tert-hydroperoxide as an oxidant.
Alcoholysis of benzotrichloride studied by liquid beam - Multiphoton ionization technique
Horimoto, Noriko,Mafune, Fumitaka,Kondow, Tamotsu
, p. 159 - 160 (1997)
Chemical reactions of benzotrichloride in an alcohol solution initiated by multiphoton ionization were observed by irradiation of a tightly focused laser beam at wavelength of 274 nm. The product ions ejected from the liquid surface were analyzed by a time-of-flight mass spectrometer. The mass spectra of the ions indicate that alcoholysis occurs between PhCCl+2 produced by multiphoton ionization and alcohol molecules, ROH, giving PhCCl(OR)+ and PhC(OR)+2.
STUDY OF INTERMOLECULAR INTERACTIONS IN A SYSTEM FOR EQUILIBRIUM CATALYTIC TRANSESTERIFICATION OF ESTERS. 1. REACTION OF BORON, TITANIUM, AND ARSENIC BUTOXIDES WITH ESTERS ACCORDING TO IR FOURIER SPECTROSCOPIC DATA
Komarova, L. I.,Lapina, N. N.,Lokshin, B. V.,Markova, G. D.,Vasnev, V. A.
, (1990)
IR spectroscopy was used to study solutions of esters of PHCOOR (R = Me, Bu, C7H15, (CH2)2OBu) in B(OBu)3, Ti(OBu)4, and As(OBu)3 and in mixtures of the latter with CCl4 and hexane.It is shown that weak complexes form between the ester molecules and B(OBu
Mechanism of Amine-Catalyzed Ester Formation from an Acid Chloride and Alcohol
Hubbard, Patricia,Brittain, William J.
, p. 677 - 683 (1998)
Stopped-flow FT-IR spectroscopy has been used to study the amine-catalyzed reactions of benzoyl chloride with either butanol or phenol in dichloromethane at 0 °C. There is a paucity of detailed rate information available in the literature for this process. Our goal was to determine whether amine catalysis operated by a nucleophilic-, specific-base-, or general-base-catalyzed mechanism. A large isotope effect was observed for butanol versus butanol-O-d which is consistent with a general- base-catalyzed mechanism. Some anomalous rate dependencies on reactant concentration and the relative rate of benzoyl chloride loss versus butyl benzoate formation were observed. The analogous reaction of phenol was studied in more detailed. An overall reaction order of three, and a negligible isotope effect for phenol versus phenol-d6 are consistent with either a base- or nucleophilic-catalyzed mechanism. The most interesting result with phenol was a large sensitivity of the rate of phenyl benzoate formation on small structural changes in the amine (e.g., diethylmethylamine versus triethylamine). We observed the key intermediate (acylammonium salt) in the nucleophilic process via NMR for solutions of benzoyl chloride and amine in the absence of alcohol; however, we did not observe this intermediate in the IR during ester formation [with the exception of 4-(dimethylamino)- pyridine]. While we can rule out specific-base catalysis (no evidence for phenoxide intermediates), it is difficult to completely eliminate nucleophilic catalysis.
Ligand free palladium catalyzed decarboxylative cross-coupling of aryl halides with oxalate monoester salts
Li, Yan,Chen, Huan-Huan,Wang, Chu-Fei,Xu, Xiao-Lan,Feng, Yi-Si
, p. 5796 - 5799 (2012)
Ligand free Pd-catalyzed decarboxylative cross-coupling of potassium oxalate monoester and derivatives with aryl iodides and bromides is described. Functionalized aromatic esters can be efficiently synthesized via this method with only 1.0 mol % Pd(OAc)2 catalyst without any phosphine ligand. This method illustrates an inexpensive and operationally simple method for the preparation of aromatic esters and acids, which is especially beneficial for a large scale synthesis.
Application of a new interface for rapid optimisation of bio-catalysed processes: Proteolytic digestion and an enzyme-catalysed transesterification as examples
Stencel, Lauren M.,Leadbeater, Nicholas E.
, p. 242 - 247 (2014)
The results of an evaluation of the iChemExplorer for the study of bio-catalysed processes are reported. The iChemExplorer comprises of a specially-designed sample tray and a control unit, the former of which replaces a traditional tray in an HPLC autosampler assembly. It can be heated and reaction mixtures can be agitated. The system has been used to study the trypsin digestion of insulin chain B, cytochrome c and bovine serum albumin as well as the lipase-catalysed transesterification reaction between ethyl benzoate and 1-butanol. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2014.
THE USE OF MICROWAWE OVENS FOR RAPID ORGANIC SYNTHESIS
Gedye, Richard,Smith, Frank,Westaway, Kenneth,Ali, Humera,Baldisera, Lorraine,at al.
, p. 279 - 282 (1986)
Four different types of organic reactions have been studied and seven different organic compounds have been prepared, under pressure in a microwave oven.Considerable rate increases have been observed.
Aromatic Acylation of Hydroxy Groups via the Rare SN1 Reaction Pathway
Bayliss, Mark A.,Homer, Roger B.,Shepherd, Martin J.
, p. 305 - 306 (1990)
The unusual reactivity of anthracene-9-carbonyl chloride indicates its acylation of low concentrations of hydroxy groups in aprotic organic solvents to proceed via an SN1 type mechanism.
MWCNTs/SnZrMoP nano-composite as Ba (II)-selective electrode and heterogeneous catalyst for esterification of primary alcohols
Kaur, Rupinder,Kaushal, Sandeep,Singh, Prit Pal
, p. 2379 - 2393 (2021)
The present investigation covers the synthesis, characterization and applications of a novel nano-composite of multiwalled carbon nanotubes–tin zirconium molybdophosphate (MWCNTs–SnZrMoP) ion exchanger. The synthesized material was characterized by various instrumental techniques viz. Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), and thermogravimetric/ differential thermal analysis (TGA/DTA). The nano-composite exhibited an ion exchange capacity of 2.56?meq?g?1, which is higher than its inorganic counterpart SnZrMoP (1.95?meq?g?1). The distribution studies confirmed that the as-synthesized nano-composite was selective for barium ions. The nano-composite was employed to fabricate an ion-selective electrode which showed a sub-Nernstian response for barium ions in the concentration range 1 × 10?7?M—1 × 10?1?M, with a response time of 11?s. The average slope of the calibration curve was observed to be 23.3?mV/decade with 1.78 × 10?8?M as limit of detection (LOD). The synthesized material was also used as a heterogeneous catalyst in esterification reactions of some primary alcohols due to its high mechanical, thermal and chemical stability. The esters produced were characterized by nuclear magnetic resonance (1H-NMR) and FT-IR techniques.
A more efficient catalyst for the carbonylation of chloroarenes
Maegerlein, Wolfgang,Indolese, Adriano F.,Beller, Matthias
, p. 2856 - 2859 (2001)
The right ligand enables the efficient carbonylation of unactivated chloroarenes. A general synthesis of benzoic acid derivatives is possible with the palladium - Ferrocenylphosphane catalysts (see scheme).
