2-Nitroallylic carbonates were first applied as promising biselectrophilic C3 synthons for bifunctional squaramide catalyzed asymmetric domino reaction with kojic acid derivatives to afford so far inaccessible nitro compounds bearing two hydroxypyranone units. The reaction products undergo noncatalytic epimerization at the carbon atom next to the nitro group. Plausible mechanism of the epimerization based on reversible formation of intermediate aci-nitro compound is proposed. The double addition products were transformed to configurationally stable acetates and to chiral nitro glutarates, promising precursors to chiral amino glutaric acid derivatives.

Biomass derived γ-pyrone-2-carbaldehydes were proposed as robust heterocyclic platform for carrying out organocatalytic asymmetric cross-aldol reactions with various aldehydes and ketones in high yield with excellent diastereoselectivity and enantioselectivity. Origins of efficient stereoinduction were revealed by quantum-chemical calculations of four possible transition states. The products were converted to synthetically useful chiral 2,4-dihydroxy carboxylic acid derivatives via protection/deprotection and Ru III -catalyzed oxidative fragmentation steps without racemization of stereogenic centers. The developed approach was applied for asymmetric synthesis of chiral pantolactones, valuable precursors of biologically active substances and natural products, and for synthesis of Dexpanthenol, a medication used for treating defects in the barrier function of skin.

The dependence of photoluminescence of nominally pure and Zn (Mg)-doped lithium niobate crystals on composition, kind, concentration of doped element and doping technology, was observed. The photoluminescence did not depend on doped element kind and was decreased with increasing in stoichiometry. A decrease in the luminescence of NbNb–NbLi centers was observed in weakly Zn (Mg)-doped LiNbO3 crystals, the emission of NbNbO6 groups dominated in strongly ones. LiNbO3 : Zn (Mg) crystals obtained by homogeneous doping had the emission of both NbNb — NbLi centers and NbNbO6-groups.