Chemoselective sulfoxidation by H2O2 or HNO3 using a phosphate impregnated titania catalyst
作者:Saitanya K. Bharadwaj、Susanda N. Sharma、Sahid Hussain、Mihir K. Chaudhuri
DOI:10.1016/j.tetlet.2009.03.106
日期:2009.7
compounds have been selectively oxidized to the corresponding sulfoxides by either H2O2 or HNO3 using a newly developed solid acid catalyst composed of 84.5% of TiO2 and 15.5% of [Ti4H11(PO4)9]·nH2O (n = 1–4). The chemoselective oxidation of sulfides in the presence of vulnerable groups such as –CN, –CC–, –CHO, or –OH, as well as sulfoxidation of substrates like benzothiazole, glycosyl sulfide, and dibenzothiophenes
使用由84.5%的TiO 2和15.5%的[Ti 4 H 11(PO 4)9组成的新开发的固体酸催化剂,已通过H 2 O 2或HNO 3将多种有机硫化合物选择性地氧化为相应的亚砜。]· n H 2 O(n = 1-4)。在易碎基团(例如-CN,-C)存在下,硫化物的化学选择性氧化C –,– CHO或–OH以及底物(如苯并噻唑,糖基硫醚和二苯并噻吩)的亚硫酸化是该协议的一些重要属性。在目前的实验条件下,硝酸比过氧化氢具有相对更好的选择性。