The Wacker reaction is one of the longest known palladium-catalysed organic transformations, and in the vast majority of cases proceeds with Markovnikov regioselectivity. Palladium(II)-mediated oxidation of styrenes was examined and in the absence of reoxidants was found to proceed in an anti-Markovnikov sense, giving aldehydes. Studies on the mechanism of this unusual transformation were carri...

The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 degrees C was catalyzed by H3PW12O40 x 13 H2O as solid acid catalyst. The effect of the proportions of acetic anhydride and catalyst, reaction time and support on the polymerization reaction was investigated. It has been found that the yield and the viscosity of the polymer depend on the proportion of acetic anhydride, t...

some chromeno[4,3-b]quinoline derivatives were synthesized in a tricomponents one-pot reaction of 1,3-cyclohexadione arylaldehydes and 4-aminocoumarin under microwave irradiation in the solventless system by using a heteropolyacid catalyst ,h3[pw12o40] in 80-95% yields and high rates. the shorter reaction times, one-pot, good yields, simple work-up procedure and environmentally friendly conditi...

Fossil additives are a primary energy source and their contribution is around 80% in the world. Therefore, bioadditives that reduce impact each very important. This article discusses chemical transformation of glycerol to carbonate, ethers, esters, ketals, acetals, compounds with high technological applications, especially fuel sector as bioadditives. Mainly, heterogeneous catalysts important p...

Some Chromeno[4,3-b]quinoline derivatives were synthesized in a tricomponents one-pot reaction of 1,3-cyclohexadione arylaldehydes and 4-aminocoumarin under Microwave irradiation in the solventless system by using a heteropolyacid catalyst ,H3[PW12O40] in 80-95% yields and high rates. The shorter reaction times, one-pot, good yields, simple work-up procedure and environmentally friendly conditi...

In this article, a series of effective catalysts based on betaine and sulfuric or phosphomolybdic acids was obtained. These compositions were characterized by various physicochemical methods tested in the oxidation sulfur- nitrogenous-containing compounds H2O2. An increase amount heteropolyacid (HPA) leads to non-linear change acidity, degree removal sulfur-containing correlates with concentrat...