Ultrasound-accelerated selective oxidation of primary aromatic amines to azoxy derivatives with trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane catalyzed by Preyssler acid-mediated nano-TiO2
作者:Davood Azarifar、Seyed-Mola Khatami、Zohreh Najminejad
DOI:10.1007/s13738-013-0328-z
日期:2014.4
Preyssler-type heteropolyacid supported on TiO2 nanoparticles has been explored as an efficient catalyst in selective oxidation of primary aromatic amines to azoxy derivatives using trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane as oxidant. The reactions proceeded smoothly under mild and green ultrasound-accelerated conditions to afford the products in high yields. The catalyst recovered from the reaction mixture exhibits long-term stability with no significant drop in its catalytic activity. .
以TiO2纳米粒子为载体的Preyssler型杂多酸已被探索作为高效催化剂,用于在温和且环保的超声加速条件下,使用反式3,5-二氢过氧-3,5-二甲基-1,2-二恶烷作为氧化剂,将伯芳香胺选择性氧化为偶氮氧衍生物。反应在温和条件下顺利进行,产率极高。从反应混合物中回收的催化剂显示出长期的稳定性,其催化活性没有显著下降。