Ceramic materials based on synthetic calcium phosphate for medical uses

This article discusses the different methods of synthesis of hydroxyapatite and receiving on its base of ceramic materials in various ways. We have also developed our own technology. The conditions of compatibility and saddle the assumption and the suitability of the material for implantation

Influence of synthesis conditions on the crystallinity of hydroxyapatite obtained by chemical deposition

The hydroxyapatite synthesis on a variety of substrates under various conditions was studied. It was shown that the increase in the temperature of the reaction medium increases the amount of nanocrystalline phase with an average crystallite size of 25 nm. Studies revealed that in addition to the pure hydroxyapatite, [beta]-Ca[3](PO[4])[2] along with calcium carbonates and carbonate-substituted hydroxyapatites were formed. A significant increase in phase crystallinity during the heating of reactants up to the reaction temperature was shown

Preparation and Synthetic Applicability of Imidazole-Containing Cyclic Iodonium Salts

A novel approach to the preparation of imidazole-substituted cyclic iodonium salts has been developed via the oxidative cyclization of 1-phenyl-5-iodoimidazole using a cheap and available Oxone/H2SO4 oxidative system. The structure of the new polycyclic heteroarenes has been confirmed by single-crystal X-ray diffractometry, revealing the characteristic structure features for cyclic iodonium salts. The newly produced imidazole-flanked cyclic iodonium compounds were found to readily engage in a heterocyclization reaction with elemental sulfur, affording benzo[5,1-b]imidazothiazoles in good yields.The heterocyclization study was supported by the Russian Science Foundation (project No. 17-73-20066). Y.A.V. kindly acknowledges the financial support from the Russian Foundation of Basic Research for the development of oxidative cyclization process (project No. 20-33-90007). This work was funded by Spain’s MINECO (CTQ2017-86936-P), AGAUR (2017 SGR 01051), and additional support from CSIC. The authors would like to acknowledge the Multi-Access Chemical Research Center SB RAS (N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry) and the Center for Chemical Analysis and Materials Research of Saint Petersburg State University for analytical measurements. X-ray structural results were obtained using the material and technical base of the Baikal Analytical Center for Collective Use of the SB RAS.Peer reviewe