Dehalogenation of organic halides in aqueous media by hydrogen transfer from formate catalyzed by water-soluble Ru(II)-N-heterocyclic carbene complexes
作者:Natália Marozsán、Henrietta Horváth、Anikó Erdei、Ferenc Joó
DOI:10.1016/j.molcata.2016.09.036
日期:2016.12
ylidene; L = tertiary phosphine, such as mtppms, mtppts, pta, pta-Me and pta-Bn; η6-arene = η6-p-cymene) were succesfully applied for the first time as catalysts in hydrodehalogenation of organic halides by hydrogen transfer from aqueous Na-formate with turnover frequencies up to TOF = 112 h−1 at 80 °C. Simultaneous to hydrodehalogenation, aqueous formate was also decomposed to H2 and HCO3−. In case
摘要 水溶性[RuCl(NHC)(L)(η6-芳烃)]配合物(NHC = bmim = 1-butyl-3-methyl-imidazole-2-ylidene;L = 叔膦,如mtppms、mtppts、pta , pta-Me 和 pta-Bn; η6-arene = η6-p-cymene) 首次成功地用作有机卤化物加氢脱卤的催化剂,其转换频率高达 TOF = 112 h -1 在 80 °C。在加氢脱卤的同时,甲酸盐水溶液也分解为 H2 和 HCO3-。在 [RuCl(bmim)(pta)(η6-p-cymene)]Cl (pta = 1,3,5-triaza-7-phosphaadamantane) 的情况下,根据动力学和 NMR 测量提出了一种反应机制加氢脱卤和甲酸脱氢都涉及 [RuH(bmim)(pta)(η6-p-cymene)]+ 作为两个循环的关键催化物质。