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Information × Registration Number 0210U007393, 0109U007350 , R & D reports Title The synthesis and properties investigation of the stable crown-carbenes popup.stage_title Head Knishevytskyy Artur Volodymyrovych, Registration Date 27-12-2010 Organization The L.M.Litvinenko Institute of Physical-Organic Chemistry and Coal Chemistry popup.description2 Diaminocarbenes were generated by the deprotonation of 5,6-dihydro-4H-pyrimidinium salts under the action of sodium hydride generated to afford the stable products of C-H insertion into acetonitrile - cyanomethylazines. The new macrocyclic 16-membered and 22-membered crown bisazolium salts were obtained upon the quaternization of bisimidazolyl- and bisbenzimidazolyloxaalkane podand system with dihalogenoxalkanes. The interaction of crown-salts with strong bases followed by the treatment with metal halogenides gave the new crown-carbene complexes of copper, nickel and palladium. The crown-biscarbene - 1,1,3,3'-bis(3-oxapentylene)-bisbenzimidazole-2-ylidene was synthesized for the first time upon the deprotonation of 1,1',3,3'-bis(3-oxapentylene)-bisbenzimidazolium perchlorate with potassium tert-butoxide in pyridine. The highest degree of catalytic activity was found for the 1,1',3,3'-bis(3-oxapentylene)-bisbenzimidazole-2-ylidene copper (I) iodide complex (TON = 80000, TOF = 32000) among the metal-carbene catalysts for the reaction of ketone reduction with isopropanol. Product Description popup.authors Глиняна Наталія Валеріївна Кисельова Ольга Леонідівна Марічев Костянтин Олександрович popup.nrat_date 2020-04-02 Close