3012-80-4Relevant articles and documents
Cobalt(II) and nickel(II) complexes with 1-methyl-2-pyridin-2-yl-1H- and 1-methyl-2-phenyliminomethyl-1H-benzimidazoles and the closo-decaborate anion
Avdeeva,Polyakova,Goeva,Malinina,Zhdanov,Zhizhin, K. Yu.,Kuznetsov
, p. 817 - 822 (2015)
Synthesis of cobalt(II) and nickel(II) complexes with the closo-decaborate anion and benzimidazole derivatives (L1 = C13N3H11, L2 = C15N3H13) of the general formula [ML3][B10H10] (M = Co, Ni) is described. Complexes have been characterized by elemental analysis, IR and UV spectroscopy. The structure of a [Ni(L1)3][B10H10] · 1.797CH3CN single crystal has been determined by X-ray diffraction. The imidazole and pyridine N atoms of three L1 molecules, two of which are disordered, form the distorted octahedral environment of the Ni atom. In the crystal, the majority of complexes [Ni(L1)3]2+ have the meridional configuration. The Ni-N bonds with the imidazole nitrogen atoms (2.010(4)-2.076(3) ?) are shorter than those with the pyridine atoms (2.132(4)-2.179(5) ?). This nonequivalence of the Ni-N bonds is responsible for the low magnetic susceptibility of the compound.
Metal-free oxidative decarbonylative halogenation of fused imidazoles
Kumar, Gulshan,Shankar, Ravi,Singh, Davinder,Tali, Javeed Ahmad
, p. 20551 - 20555 (2021/11/23)
An efficient strategy has been developed for the deformylative halogenation of carbaldehyde imidazo-fused heterocycles in the presence of TBHP controlled by temperature. A convenient and sequential functionalization (C8 to C3) portrays the synthetic utility of the current method.N-Heterocycle benzamide products were also observedviathe ring opening of imidazopyridines through the cleavage of C-C bond at high temperatures. Features of this method include temperature-controlled excellent regioselectivity, mild conditions and functional group tolerance.
Reactions of 2-carbonyl- And 2-hydroxy(or methoxy)alkylsubstituted benzimidazoles with arenes in the superacid CF3SO3H. NMR and DFT studies of dicationic electrophilic species
Ryabukhin, Dmitry S.,Turdakov, Alexey N.,Soldatova, Natalia S.,Kompanets, Mikhail O.,Ivanov, Alexander Yu.,Boyarskaya, Irina A.,Vasilyev, Aleksander V.
supporting information, p. 1962 - 1973 (2019/09/03)
Reactions of 2-carbonyl- and 2-hydroxy(or methoxy)alkylbenzimidazoles with arenes in the Br?nsted superacid TfOH resulted in the formation of the corresponding Friedel-Crafts reaction products, 2-diarylmethyl and 2-arylmethyl-substituted benzimidazoles, in yields up to 90%. The reaction intermediates, protonated species derived from starting benzimidazoles in TfOH, were thoroughly studied by means of NMR and DFT calculations and plausible reaction mechanisms are discussed.