Planar Chiral Rhodium Complex Based on the Tetrahydrofluorenyl Core for Enantioselective Catalysis.

A simple four-step route to a chiral tetrahydrofluorenyl rhodium catalyst from naturally occurring (-)-α-pinene was developed. Our approach does not use multistep and time-consuming procedures such as chiral HPLC or diastereomeric resolution. The key to success lies in the face-selective coordination of rhodium to the sterically hindered tetrahydrofluorenyl ligand, giving only one diastereomeric complex.

Reductive coupling of nitroarenes with carboxylic acids - a direct route to amide synthesis.

A straightforward and selective way for the preparation of amides from nitroarenes and carboxylic acids using carbon monoxide as a reductant was developed. This protocol does not require any non-gaseous additives, thus simplifying product isolation. Aliphatic carboxylic acid was modified in the presence of aromatic ones, and reducible functional groups such as CC, Ar-Br, and R-NO were saved.

Less and Less Noble: Local Adsorption Properties of Supported Au, Ni, and Pt Nanoparticles.

In this work, we studied the local adsorption properties of gold, nickel, and platinum nanoparticles. A correlation was established between the chemical properties of massive and nanosized particles of these metals. The formation of a stable adsorption complex M-A on the nanoparticles' surface was described.

Triphenylcyclopentadienyl Rhodium Complexes in Catalytic C-H Annulations. Application for Synthesis of Natural Isocoumarins.

Efficient protocols for the synthesis of triphenylcyclopentadienyl rhodium halides [(1,2,4-CPhH)RhX] (,: X = Cl, I) starting from 1,2,4-triphenylcyclopentadiene or the cyclooctadiene derivative (1,2,4-CPhH)Rh(cod) () were developed. Iodide abstraction from with thallium or silver salts allowed us to prepare rhodocenium [(1,2,4-CPhH)RhCp]PF (PF) and mesitylene complex [(1,2,4-CPhH)Rh(mesitylene)](SbF) ((SbF)). Halides , (at 0.

[HYGIENIC ASSESSMENT OF NUTRITION AND INCIDENCE OF INDIVIDUAL DISEASES OF STUDENT'S SECONDARY PROFESSIONAL EDUCATION IN MODERN CONDITIONS].

The primary prevention of a significant number of diseases today is based on the principles of a healthy lifestyle which are the most important conditions for maintaining and strengthening the health of the population. At the same time, one of the main tasks is to optimize the nutritional status, preserve and improve the health of certain groups of the population and, above all, children and adolescents. The purpose of the work is a hygienic assessment of the characteristics of the nutritional status and nutritional health of young students and the scientific substantiation of recommendations for their optimization.