Reaction of a trinuclear silver pyrazolate {[3,5-(CF3)2Pz]Ag}3 complex with tricyclohexylphosphine at different reagent ratios leads to the formation of heteroleptic dinuclear or tetranuclear complexes. According to the single crystal X-ray analysis of the dinuclear complex, hexane molecules are incorporated into the cavities formed as the result of supramolecular packing. Coordination of a phosphine ligand makes dinuclear silver pyrazolate to exhibit blue emission at room temperature. 相似文献
The Knövenagel–Michael–Mannich cascade reaction of aromatic aldehyde (3 equiv.), malononitrile (2 equiv.) and ammonium acetate or aqueous ammonia provides convenient stereoselective access tocis,cis-2,4,6-triaryl-3,3,5,5-tetracyanopiperidines in 62–94% yields. Six new bonds form as a result of the domino process, ammonium acetate serving as a nitrogen source.相似文献
The first synthesis of 3,5-dimethyl-1-boraadamantane from its easily available tetrahydrofuran adduct comprised sequential treatment with BuLi, AcCl, (Cy2BH)2 and heating. The compound was converted into its electronic ‘antagonist’, namely, 3,5-dimethyl-1-azaadamantane.
Three phosphines bearing halodifluoromethyl group were obtained starting from chlorodiphenylphosphine. Silicon reagents Me3SiCF2X (X = Cl, Br) were used to install chloroor bromodifluoromethyl group to the phosphorus atom. Iododifluoromethyl-substituted phosphine was prepared by bromine/iodine exchange. 相似文献
The new multicomponent reaction comprises the triethylamine catalyzed assembling of salicylaldehydes, 2-aminoprop- 1-ene-1,1,3-tricarbonitrile and 3-methyl-2-pyrazolin-5-one in small amount of propanol, which affords substituted 2,4-diamino-5-(5-hydroxy-3-methyl-1H-pyrazol-4-yl)-5Hchromeno[2,3-b]pyridine-3-carbonitriles in 63–98% yields. This process is in agreement with PASE principles and opens the way to new chromeno[2,3-b]pyridine scaffold containing 3-methyl-2-pyrazolin-5-one fragment, which is promising for various biomedical applications. 相似文献
