98061-21-3Relevant articles and documents
Cyclometalated Rhodium(III) Complexes Based on Substituted 2-Phenylpyridine Ligands: Synthesis, Structures, Photophysics, Electrochemistry, and DNA-Binding Properties
Liang, Haoran,Hao, Taotao,Yin, Changzhen,Yang, Xi,Fu, Haiyan,Zheng, Xueli,Li, Ruixiang,Xiao, Dan,Chen, Hua
, p. 4149 - 4157 (2017)
A new series of octahedral rhodium(III) complexes 1–8 of the type [(Ln)2Rh(dppz)]Cl (n = 1–6) and [(Ln)2Rh(dppz)](PF6) {n = 1, 7, 8; L = 2-phenylpyridine, with different modifications, as the C,N-chelating ligand; and dppz = dipyrido[3,2-a:2′,3′-c]phenazine} have been synthesized and fully characterized. The photophysical properties of the complexes have been investigated. The single-crystal X-ray diffraction structures of five complexes – [(L1)2Rh(dppz)](PF6), [(L2)2Rh(dppz)]Cl, [(L3)2Rh(dppz)](PF6), [(L4)2Rh(dppz)](PF6), and [(L8)2Rh(dppz)](PF6) – have confirmed the anticipated structure and have revealed the effect of substitution on the structure of the complex, which has been reasonably explained through experimental electrochemical characterization. The interaction of complexes 1–8 with calf thymus DNA (CT DNA) has been verified by the fluorescent detection of ethidium bromide (EB) displacement studies. The result clearly suggests that the DNA-binding abilities of these Rh complexes are not only influenced by the DNA-intercalator dppz, but are also highly influenced by the electronic and steric properties of the C,N-chelating ligands.
Cp*Rh(iii)/boron hybrid catalysis for directed C-H addition to β-substituted α,β-unsaturated carboxylic acids
Hirata, Yuki,Kojima, Masahiro,Matsunaga, Shigeki,Tanaka, Ryo,Yoshino, Tatsuhiko
supporting information, p. 76 - 79 (2021/12/29)
The C-H bond addition reaction of 2-phenylpyridine derivatives with α,β-unsaturated carboxylic acids catalyzed by Cp*Rh(iii)/BH3·SMe2is reported. Activation of C-H bonds with the rhodium catalyst and activation of α,β-unsaturated carboxylic acids with the boron catalyst cooperatively work, and a BINOL-urea hybrid ligand significantly improved the reactivity. With the optimized hybrid catalytic system, various β-disubstituted carboxylic acids were obtained under mild reaction conditions.
Multicomponent Aromatic and Benzylic Mannich Reactions through C?H Bond Activation
Xavier, Tania,Rayapin, Corinne,Le Gall, Erwan,Presset, Marc
supporting information, p. 13824 - 13828 (2019/11/03)
Multicomponent Mannich reactions through C?H bond activation are described. These transformations allowed for the straightforward generation of densely substituted benzylic and homo-benzylic amines in good yields. The reaction involves a reaction between two transient species: an organometallic species, generated by transition-metal-catalyzed sp2 or sp3 C?H bond activation and an in situ generated imine. The use of an acetal as an aldehyde surrogate was found essential for the reaction to proceed. The process could be successfully applied to RhIII-catalyzed sp2 C?H bond functionalization and extended to CuII-catalyzed sp3 C?H bond functionalization.
N-heterocyclic carbene enabled rhodium-catalyzed ortho C(sp2)-H borylation at room temperature
Zhong, Lei,Zong, Zhi-Hong,Wang, Xi-Cun
supporting information, p. 2547 - 2552 (2019/03/27)
We report a rhodium-catalyzed ortho C(sp2)-H borylation of 2-phenylpyridines using commercially available N-heterocyclic carbenes (NHCs) as ligand and pinacolatodiboron (B2pin2) as borylating reagent. The reaction could take place at room temperature, tolerating a wide range of functionalities and affording ortho borylated products in moderate to excellent yields. The current method is also applicable to gram-scale reaction with reduced catalyst loading.
