Cross-coupling is a fundamental reaction in the synthesis of functional molecules, and has been widely applied, for example, to phenols, anilines, alcohols, amines and their derivatives. Here we report the Ni-catalysed Stille cross-coupling reaction of quaternary ammonium salts via C-N bond cleavage. Aryl/alkyl-trimethylammonium salts [Ar/R-NMe3]+ react smoothly with arylstannanes in 1:1 molar ...

An HPLC-UV method to determine compounds having a hydroxyl functional group in plant essential oils is developed. The sample is diluted with 1,4-dioxane and the analytes are derivatized with phthalic anhydride. The derivatives (phthalates hemiesters) are separated on a C8 column using an acetonitrile (ACN)/water gradient. Separation conditions were optimized using the DryLab(®) method developme...

Several palladium complexes with bidentate phosphine ligands were tested for their activity in the O-allylation of phenols with allyl alcohol. The use of C3-bridged bidentate phosphine ligands results in very high selectivity for O-allylation. The reactions do not require stoichiometric amounts of additives to control the chemoselectivity. Especially, catalysts with gem-dialkyl substituted C3-b...

the catalytic air oxidation-trimerization of alcohols was carried out with hetropolyacids. in the presence of hetropolyacid formation of cyclotrimers of alcohols and aldol condensation products was observed. the 1,3,5-trioxanes were major and aldol condensation compounds were minor products.

The present work deals with an experimental investigation into the generation and characterization of pyrolytic oil biochar from Sal wood sawdust (SW). pyrolysis experiment was performed in a semi-batch reactor at 500 oC 80 oC/min heating rate CaO, CuO, Al2O3 catalysts. Further, were investigated using different analyses, including proximate analysis, elemental thermal stability, GC-MS, FTIR, f...

Microwave-assisted pyrolysis of seaweed biomass was conducted using a microwave system. The product yields were determined and the components bio-oil analyzed by gas chromatography-mass spectrometry (GC-MS). Results showed that as temperature increased from 400 °C to 600 °C, yield bio-char decreased. However, rose firstly then reduced. maximal 18.4 wt.% when 500 °C. obtained is mixture very com...

A library of hydrogenated, perfluorinated aliphatic and aromatic (p-substituted) alcohols are selected together with a combination of superbases (SBs) and metal hydrides (MHs) to understand the thermodynamic parameters of the binary mixtures once serving as sorbents for the capture of CO2via ionic organic alkyl-carbonate (RCO3-) formation. Data are obtained using density functional theory (DFT)...

Background & Aim: The use of herbs in traditional medicine to treatment of diseases and other purposes in the food industry and cosmetics has since long been considered.  Considering thatHeracleum lasiopetalum, Thymus carmanicus and Myrtus communis have many health benefits therefore this research were performed to investigate the chemical composition of essential oil...

In this paper, a novel catalyst (MgAl2O4@SiO2-PTA) was proposed for the green oxidation of aliphatic alcohols. The resultant composite was characterized by different techniques, such as X-ray diffraction (XRD), SEM, FT-IR, EDX and Brunauer-Emmett-Teller (BET) surface area analysis. The prepared nanocomposite was used as a catalyst for oxidation of aliphatic alco...