74804-05-0Relevant articles and documents
Experimental and theoretical investigation of a metalloreceptor bearing a [Re(CO)3]+ core incorporating a multifunctional ligand: Selective reactivity towards Zn2+ and CN- ions
Das, Tapashi,Rajak, Kajal Krishna
, p. 6879 - 6891 (2019)
The multifunctional ligand HL [(E)-1-(((di(pyridin-yl)methylene)hydrazono)methyl)naphthalen-2-ol] has been used in the present work. The mononuclear complex 1, ([Re(HL)(CO)3Cl]), has been synthesised in excellent yield by reacting rhenium(i) pentacarbonyl chloride [Re(CO)5Cl] with HL in a 1:1 ratio in dry toluene under an argon atmosphere. The complex 2, ([Re(L)(CO)3]), has also been prepared in a similar way in the presence of triethylamine. X-ray crystallographic study reveals that in complex 1, the ligand binds as an N^N coordinating bidentate ligand while in 2 it behaves as a monoanionic N^N^O coordinating tridentate ligand. Complexes 1 and 2 were characterised by different physicochemical techniques and the observed properties have been interpreted with the help of DFT (density functional theory) and TDDFT (time dependent density functional theory) calculations. Interestingly, complex 1 interacts with Zn(OAC)2 in methanol to yield amido binding highly reactive α-amino ether containing rhenium(i) complex 3, ([Re(HL-OMe)(CO)3]). The X-ray structure and spectral properties of the generated complex 3 have also been studied. Complex 1 selectively reacts with a cyanide ion and a high detection limit (5.0 × 10-8 M) was observed. The properties of intermediates and the final product upon addition of cyanide were also matched with the DFT, TDDFT and NTO (natural transition orbital) analysis.
Towards the installation of transition metal ions on donor ligand decorated tin sulfide clusters
Barth, Beatrix E. K.,Leusmann, Eliza,Harms, Klaus,Dehnen, Stefanie
, p. 6590 - 6592 (2013)
Decoration of tetrelchalcogenide T-E clusters with chelating donor ligands was achieved to capture transition metal ions on their surfaces. We demonstrate that by covalent linking of bispyridyl ligands to an Sn-S complex, [ZnX] + units can be t
Recyclable Heterogeneous Copper(II)-Catalyzed Oxidative Cyclization of 2-Pyridine Ketone Hydrazones towards [1,2,3]Triazolo[1,5-a]pyridines
Cai, Mingzhong,Jiang, Gan,Lin, Yang,Zhao, Hong
, p. 4487 - 4497 (2019/11/21)
The heterogeneous copper(II)-catalyzed oxidative cyclization of 2-pyridine ketone hydrazones was achieved in ethyl acetate at room temperature in the presence of an MCM-41-anchored bidentate 2-aminoethylamino copper(II) catalyst [MCM-41-2N-Cu(OAc) 2
Facile one-pot synthesis of [1,2,3]triazolo[1,5-a]pyridines from 2-acylpyridines by copper(II)-catalyzed oxidative N-N bond formation
Hirayama, Tasuku,Ueda, Satoshi,Okada, Takahiro,Tsurue, Norihiko,Okuda, Kensuke,Nagasawa, Hideko
supporting information, p. 4156 - 4162 (2014/04/17)
An efficient and simple method for the synthesis of various [1,2,3]triazolo[1,5-a]pyridines has been established. The method involves a copper(II)-catalyzed oxidative N-N bond formation that uses atmospheric oxygen as the terminal oxidant following hydrazonation in one pot. The use of ethyl acetate as the solvent dramatically promotes the oxidative N-N bond-formation reaction and enables the application of oxidative cyclization in the efficient one-pot reaction. A mechanism for the reaction was proposed on the basis of the results of a spectroscopic study. In the same pot: [1,2,3]Triazolo[1,5-a] pyridines are synthesized from the corresponding 2-acylpyridines by a one-pot method, consisting of hydrazonation followed by oxidative cyclization through copper(II)-catalyzed N-N bond formation (see scheme).
