Various allylic alcohols reacted with n-butyl acrylate in the presence of p-toluenesulfonic anhydride and palladium catalysts to yield the corresponding n-butyl 2,5-dienoates with high regioselectivity.

A novel heterogeneous efficient procedure has been developed for the chemoselective synthesis of acylals (1,1-diacetates) under solvent-free conditions. A novel catalyst prepared by the sulfuric acid catalyzed copolymerization of p-toluenesulfonic acid and paraformaldehyde displays extremely high activities for the title reactions, affording average yields over 90% within several minutes. A com...

This review article is dedicated to special polysaccharide esters – the toluenesulfonic acid (tosylates) and carbonate esters. After describing specifics of synthesis, particular emphasis placed on use tosylates phenyl carbonates for subsequent modification by nucleophilic substitution (SN) reactions. For this purpose, advantages limitations respective derivatives are discussed with regard thei...

A simple, efficient and highly diastereoselective one-pot three-component synthesis of functionalized 2,6-disubstituted-4-tosyloxytetrahydropyrans was performed. The synthesis features an optimized Prins cyclization in which an aromatic homoallylic alcohol, an aromatic/aliphatic aldehyde, and p-toluenesulfonic acid (catalyst and reagent) are reacted in the presence of molecular sieves (MS) 4 Å ...

Pseudomonas putida S-313 (= DSM 6884) grew in sulfate-free medium when the sole sulfur source supplied was one of several arylsulfonates involved in the synthesis, application, or biodegradation of linear alkyl-benzenesulfonate (LAS) surfactants. 2-(4-Sulfophenyl)butyric acid, 4-n-butyl-1-methyl-6-sulfotetralin, and 4-toluenesulfonic acid were each completely utilized during growth, as were the...

From studies on 11 different proteins (including native albumin and albumin with reduced disulfide-bridges) treated with sulfosalicylic, 2-naphthalenesulfonic, toluenesulfonic, dichloroacetic, or trichloroacetic acids, we elucidate the interactions determining the resulting turbidities and other factors affecting turbidities, and we discuss the clinical utility of such turbidimetry. At least th...

New routes to porous materials can help lower production costs, improve sustainability, and broaden design options. Here, we use a selection of organic acids as catalysts in the synthesis hyper-cross-linked polymers from benzyl methyl ether compounds. This approach provides new route metal-free addresses one largest setbacks by allowing simple recovery recycling nonmetallic catalyst. By p-tolue...

This paper is aimed to estimate the transmittance of electronic effects in fluorescein molecule between phthalic acid residue and xanthene moiety. Despite almost orthogonal orientation latter with respect rest molecule, some influence substituents this 9-aryl ring on dissociation hydroxyl group hydroxyxanthene cannot be ruled out. In order reveal (possible) effect, we blocked carboxylic via est...