1478042-83-9Relevant academic research and scientific papers
Backbone thio-functionalized imidazol-2-ylidene-metal complexes: Synthesis, structure, electronic properties, and catalytic activity
Karthik, Vedhagiri,Bhat, Irshad Ahmad,Anantharaman, Ganapathi
, p. 7006 - 7013 (2013)
A new synthetic route to prepare imidazolium salts with heteroatom-containing functional groups at the backbone has been reported. Accordingly, the first example of a backbone bis-thiofunctionalized imidazolium salt (4) was prepared by sequential metal-halogen exchange reaction of 1-methyl-4,5-diiodoimidazole (1) followed by a quaternization reaction with methyl iodide. The metal-carbene complexes 6, 8, and 10 were synthesized conveniently through three different routes, namely, (a) an in situ generated carbene route, (b) a transmetalation method, and (c) direct reaction with a basic metal precursor, and structurally characterized. Subsequently the electronic properties of the newly prepared 1,3-dimethyl-4,5-bis(phenylthio)- imidazol-2-ylidene ((SPh)2IMe) was studied by measuring the carbonyl stretching frequency of the corresponding [Ir{(SPh)2IMe}(CO) 2(Cl)] complex. In addition, the air-stable palladium-NHC complex 10 was found to be catalytically active in Suzuki-Miyaura coupling reactions of aryl bromides.
Synthesis of imidazole-based functionalized mesoionic carbene complexes of palladium: Comparison of donor properties and catalytic activity toward Suzuki-Miyaura coupling
Karthik, Vedhagiri,Gupta, Vivek,Anantharaman, Ganapathi
, p. 6218 - 6222 (2014)
Three different backbone-monofunctionalized imidazolium salts have been synthesized using the metal-halogen exchange procedure, and their corresponding mesoionic carbene complexes with palladium were prepared via oxidative addition without protection of the C2 position. The donor properties were evaluated with 31P NMR spectroscopy of the respective palladium complexes. The catalytic activity of these complexes toward Suzuki-Miyaura coupling of aryl bromides was also explored. Also, in one case, a comparison of donor properties was made with those of a normal carbene with similar steric bulk.
A six-membered bimetallic imidazol-4-yl-palladacycle: Synthesis, structure and catalytic activity
Avinash, Iruthayaraj,Parveen, Sabeeha,Anantharaman, Ganapathi
, p. 713 - 719 (2020/07/02)
The treatment of 1-methyl-4-iodo-5-phenylthioimidazole (1) with Pd(PPh3)4 leads to the formation of a six membered bimetallic palladium-imidazol-4-yl complex (2). Spectroscopic and crystallographic analysis prove that 2 is made-up of
