Search academic texts

Information × Registration Number 0215U004348, 0109U008220 , R & D reports Title Stable carbenes and their metal complexes in heterocyclic synthesis and catalysis of organic reactions popup.stage_title Head Korotkikh Nikolai Ivanovich, Доктор хімічних наук Registration Date 05-03-2015 Organization The L.M.Litvinenko Institute of Physical-Organic Chemistry and Coal Chemistry popup.description2 Object of the study is the synthesis of sterically shielded aryl substituted of imidazol-2-ylidenes and 1,2,4-riazol-5-ylidenes and their palladium complexes, synthesis of derivatives on the basis of stable carbenes, catalytic efficiency in the reaction of haloarene hydrodehalogenation. The purpose of the work is synthesis of sterically shielded aryl derivatives of imidazol-2-ylidenes and 1,2,4-triazol-5-ylidenes and their palladium complexes study of the structure and catalytic efficiency of complexes in the reaction of haloarene hydrodehalogenation, transformations of 1,2,4-triazol-5-ylidenes with electrophiles. Methods of the research are synthetic , kinetic , spectral (NMR spectroscopy ) analytical, chromatoghrafical, elemental analysis), quantum chemical, X-ray diffraction study. Basic results. Sterically shielded aryl substituted imidazol-2-ylidenes and 1,2,4-triazol-5-ylidenes and salt palladium complexes on their basis have been synthesized. A monomeric character of palladium complexes of imidazol-2-ylidenes with branched aryl substituents and a dimeric (binuclear) character of complexes with 2,6-diisopropylphenyl (dipp) substituents have been established. The high catalytic effect of sterically shielded complexes with branched aryl substituents relative to dipp-substituted and sterically open. A stable spirocyclic compound a derivative of 1,2,4-triazolo-spiro-pyrrolinthione was synthesized by the reaction of 1,2,4-triazol-5-ylidene with phenylisothiocyanate and dimethyl acethylene dicaroxylate. A new transformation of 4-bromoaniline was found under the alkylation by benzhydrole in the acidic medium that as a result of substitution of bromine to benzhydryl gives 2,4,6-trisbenzhydrylaniline. The data obtained have significance for the preparative synthesis of stable carbenes, transition metal carbene complexes as catalysts of organic reactions and for the heterocyclic synthesis. Scope of application - catalysis of organic reactions, synthesis of carbenes and transition metal carbene complexes, heterocyclic synthesis on the basis of carbenes. Product Description popup.authors Єня Василь Іванович Глиняна Наталія Валеріївна Дорошенко Тетяна Федорівна Кисельов Артем Вікторович Кнішевицький Артур Володимирович Ковач Микола Анатолійович Короткіх Микола Іванович Лящук Сергій Миколайович Орлов Максим Артурович Раєнко Генадій Федорович Сабєров Вагіз Шамільйович Швайка Олесь Павлович popup.nrat_date 2020-04-02 Close