The structural and functional composition of humic acids in natural urbanized areas the European Far North Arctic has been studied using modern physical chemical research methods. It is shown that content fulvic for most soils higher than acids; soils, process humus formation humate (replantozem, pelozem humus-peat soil), humate-fulvate (turf soil, culturozem urbanozem) fulvate type (gleezem li...

The samples of brown coal, bitumen and humic acids (HA) extracted from them are characterized by means elemental proximate analyses, FTIR, 13С NMR (CPMAS) spectroscopy gas chromatography-mass spectrometry. presence biologically active substances is detected in the samples. biological activity preparations form sodium humates saponifiable component bituminous resin investigated depending on stru...

We show a convenient decarboxylative aldol process using a scandium catalyst and a PYBOX ligand to generate a series of highly functionalized chiral α-hydroxy esters. The protocol tolerates a broad range of β-keto acids with inactivated aromatic and aliphatic α-keto esters. The possible mechanism is rationalized.

The first ruthenium-catalyzed cross-coupling of aldehydes with arylboronic acids is reported. Various aliphatic and aromatic aldehydes are transformed to the corresponding arylketones. A total of 31 examples with moderate to excellent yields are presented, together with the results of an initial mechanistic investigation.

A copper-mediated directed demethylation of propionamides has been developed. This reaction proceeds predominantly at the α-methyl groups of aliphatic amides with high efficiency and provides a unique tool for the direct cleavage of unactivated C(sp(3))-C(sp(3)) bonds. The directing groups can be smoothly removed to afford the corresponding alkyl carboxylic acids.