62913-23-9Relevant articles and documents
Pyridazine-based N-heterocyclic carbene complexes and ruthenium-catalyzed oxidation reaction of alkenes
Liu, Xiaolong,Chen, Wanzhi
, p. 6614 - 6622 (2012/11/06)
[Ru2Cl(L)(CH3CN)4](PF6) 3 (1, L = 3,6-bis(N-(pyridylmethyl)imidazolylidenyl)pyridazine), [Cu3La3](PF6)3 (2, L a = 3-(N-(pyridylmethyl)imidazolylidenyl)-6-(N-(pyridylmethyl) imidazolylonyl)pyridazine), [Pd2(allyl)2L](PF 6)2 (3), [Pd2(allyl)2L b2](PF6)2 (4, Lb = N-pyridylmethylimidazole), and [NiLc2](PF 6)2 (5, Lc = 3-(N-(pyridylmethyl) imidazolylidenyl)-6-methoxylpyridazine) have been synthesized and fully characterized by NMR spectroscopy, elemental analysis, and X-ray diffraction analysis. In complex 1, ligand L binds to two Ru(II) centers, forming a well-behaved Ru2(L)Cl plane with a five-membered metallocyclic ring. Complex 2 is trinuclear, containing a triangular Cu3 unit bonded together by three 3-(N-(pyridylmethyl)imidazolylidenyl)-6-(N-(pyridylmethyl) imidazolylonyl)pyridazine, where one imidazolylidene was oxidized into imidazolone. Deprotonation reaction with Ag2O in CH3CN and CH3OH resulted in C-N cleavage of the imidazolium salt, and subsequent reaction with [Pd(allyl)Cl]2 and Ni(PPh3) 2Cl2 gave 4 and 5, respectively. Dinuclear Ru(II)-NHC complex 1 exhibits excellent catalytic activity for the oxidation of alkenes into diketones.
SIMPLE SYNTHESIS OF VINYL AND ETHYNYL DERIVATIVES OF CARBAZOLE AND THE CORRESPONDING BIS-α-DIKETONES
Kovaleva, L. F.,Reutova, O. I.,Sarycheva, T. A.,Sheludyakov, O. A.,Novikov, A. N.,Filimonov, V. D.
, p. 583 - 585 (2007/10/02)
Derivatives of carbazole with unsaturated substituents in the ring were obtained by two types of palladium catalysis.The synthetic advantages of heterogeneous catalysis were studied.It was shown by (1)H NMR that the oxidative coupling of diiodocarbazole w