Oxidoperoxidotungsten(VI) Complexes with Secondary Hydroxamic Acids: Synthesis, Structure and Catalytic Uses in Highly Efficient, Selective and Ecologically Benign Oxidation of Olefins, Alcohols, Sulfides and Amines with H
<sub>2</sub>
O
<sub>2</sub>
as a Terminal Oxidant
作者:Swarup K. Maiti、Subhajit Dinda、Surajit Banerjee、Alok K. Mukherjee、Ramgopal Bhattacharyya
DOI:10.1002/ejic.200701043
日期:2008.4
respectively. Aqueous tungstate solution, on reaction with all these hydroxamic acids, produced [W(O)2(hydroxamato)2] (6). The complexes show excellent catalytic functions in the oxidation of (a) olefins at room temperature in the presence of NaHCO3 as promoter, (b) alcohols, sulfides and amines, at reflux, with H2O2 as a terminal oxidant, yielding a high turnover number (TON), the highest being for olefin-to-epoxide
新鲜沉淀的 WO3 在 H2O2 中的溶液分别与仲异羟肟酸 N-苯甲酰基-N-苯基异羟肟酸 (BPHAH)、N-苯甲酰基-N-邻甲苯基异羟肟酸 (BOTHAH)、N-苯甲酰基-N-间反应-甲苯基异羟肟酸 (BMTHAH)、N-苯甲酰基-N-对甲苯基异羟肟酸 (BPTHAH) 和 N-肉桂基-N-苯基异羟肟酸 (CPHAH) 得到 [WO(O2)(BPHA)2] (1), [WO( O2)(BOTHA)2] (2), [WO(O2)(BMTHA)2] (3), [WO(O2)(BPTHA)2] (4) 和 [WO(O2)(CPHA)2] ( 5) 分别。钨酸盐水溶液与所有这些异羟肟酸反应生成 [W(O)2(异羟肟)2] (6)。该配合物在 (a) 在室温下在 NaHCO3 作为促进剂,(b) 醇、硫化物和胺的存在下,在回流下,以 H2O2 作为末端氧化剂,在室温下氧化烯烃中显示出优异的催化功