Photochemical dehalogenation mediated by macrocyclic nickel(II) complexes

Research Progress on Dehalogenation Reaction

“…类似地, 在一些以醇类(如异丙醇)为氢源 的脱卤反应中, 也可使用混杂的钛、铁氧化物介孔材料 催化体系代替钯类物种 [46] . (27) 另外, 随着有机光化学越来越受到重视, 近年来也 有光催化脱卤反应应用于芳基卤化物脱卤的报道 [48] , …”

Microwave-Assisted Hydrogen-Free Reductive Deiodination of Iodoarenes with Silicon-Nanoarray Palladium-Nanoparticle Catalyst

“…Thus, the development of a safe and highly efficient halogenation system is still important. In this study, we focused on triethanolamine (TEOA), which is a well-known sacrificial reductant for photocatalysis 7,10 and a CO 2 capture agent. 11 TEOA possesses synthetic and industrial advantages attributed to its low vapor pressure (1.3 Pa at 20 °C), high boiling point (335 °C), high flash point (199 °C), and low toxicity (orl-mus LD 50 = 5846 mg/kg).…”

“…At present, numerous efforts are being made to develop reductive dehalogenation systems for green sustainable chemistry. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Heterogeneous 1 and homogeneous 2 Pd, Zr, 3 Fe, 4 Cu, 5 and Ni 6 catalysts, Ru 7 and organic 8 photocatalysts, as well as nonmetallic agents 9 have been applied in these dehalogenation systems in the presence of reducing agents. Due to the increasing demand for a hydrogen society, reactions using hydrogen gas has garnered attention, promoting the development of dehalogenation systems using hydrogen gas.…”

Hydrodehalogenation of Polyhalogenated Aromatics Catalyzed by NiPd Nanoparticles Supported on Nitrogen‐Doped Graphene

“…[2] Activation of C Ar ÀX(X= Cl or Br) bonds to achieve full conversion to C Ar ÀHi st he key step in PHA degradation. Conventional methods to accomplish this transformationr ely on hydrodehalogenation reactions in the presence of ac atalyst with either isopropanol or pressurized H 2 as the hydrogen source.T ransition metal complexes of Pd, [3] Rh, [4] Ni, [5] Co, [6] or Fe, [7] are often selected as hydrodehalogenation catalysts under homogeneous reactionc onditions, but these complexes often show limited stabilitya nd reusability.F or example, aR h catalystr equires strongb ase (tBuOK), high temperature (100 8C) and al ong reaction time (24 h) to dehalogenate chlor-obenzene. [4a] Mild biological reagents have also been developed to degrade halogenated pollutants, but these systems require extremely long reactiont imes, and only work with low concentrations of PHAs.…”