Iridium catalysts supported on anatase with high surface area showed excellent activities for the acceptor-less dehydrogenation synthesis of benzoxazoles from 2-aminophenol and primary alcohols. The catalytic activity greatly depended titania supports, iridium precursors, loading species. Catalysts JRC (Japan Reference Catalyst)-TIO-10 highest dehydrogenative reaction. Preparation using [Ir(cod...

Trimethylsilylation of alcohols and phenols were carried out under solvent-free conditions with hexamethyldisilazane (HMDS) using LaCoO3 perovskite. LaCoO3 as an efficient catalyst accelerated this reaction under milder condition. The advantages of this method are evident regarding, easy separation, low cost and low catalyst loading, lack of pollution, easy work-up, and selective protection of ...

In recent years, there has been a large number of what are called standard preparations, such as asymmetric hydrogenation using asymmetric reduction catalysts typified by BINAP and methods using enzymatic hydrolysis, that are reliable from an industrial point of view for the synthesis of optically active secondary alcohols. Furthermore, there are many producers of pharmaceutical intermediates t...

An efficient method is described for the mild and rapid tetrahydropyranylation of alcohols and phenols using a catalytic amount of N-chlorosaccharin (1 mol %) and 3, 4-dihydro-2H-pyran under solvent-free condition at room temperature. Benzylic alcohols and phenols containing electron withdrawing or donating groups in various positions of phenyl ring, cinamyl alcohol, primary, ...

One of the most common techniques for wine analysis is gas chromatography coupled with flame ionization detector and headspace autosampler (HSS-GC/FID) volatile compounds in samples. The main goal this thesis was to develop method volatiles (methanol, higher alcohols, esters) samples made Cabernet Sauvignon Merlot. Validation parameters were: r2 > 0.995; LOD (0.2–1.0 mg/L); CV (2.7–6.3%), re...

Products and intermediates of the oxidation of aqueous alkanoic acids initiated by gas-phase hydroxyl radicals, ·OH(g), at the air-water interface were detected by mass spectrometry in a novel setup under various experimental conditions. Exposure of submillimolar RCOOH (R = methyl, n-pentyl, n-heptyl) aqueous microjets to ∼10 ns ·OH(g) pulses from the 266 nm laser flash photolysis of O3(g)/O2(g...

The formation of C N bonds is one of the most important transformations in chemistry because nitrogen-containing compounds, particularly amines and their derivatives, are versatile building blocks for various organic molecules and essential precursors to a variety of biologically active compounds. Although several methods are known for the synthesis of C N bonds, preparation under mild and wast...