Continuous Flow Oxidation of Alcohols Using TEMPO/NaOCl for the Selective and Scalable Synthesis of Aldehydes
作者:Parth Naik、Jorge García-Lacuna、Patrick O’Neill、Marcus Baumann
DOI:10.1021/acs.oprd.3c00237
日期:——
A simple and benign continuous flow oxidation protocol for the selective conversion of primary and secondary alcohols into their respective aldehyde and ketone products is reported. This approach makes use of catalytic amounts of TEMPO in combination with sodium bromide and sodium hypochlorite in a biphasic solvent system. A variety of substrates are tolerated including those containing heterocycles
报道了一种简单且良性的连续流动氧化方案,用于选择性地将伯醇和仲醇转化为各自的醛和酮产物。该方法在双相溶剂系统中结合使用催化量的 TEMPO 和溴化钠和次氯酸钠。可耐受多种底物,包括含有基于潜在敏感氮和硫部分的杂环的底物。流动方法可以通过形成羰基亚硫酸氢盐加合物与在线反应萃取相结合,这有助于分离剩余底物或其他杂质。对十克规模的苯丙醛的制备过程稳健性进行了评估,苯丙醛是一种三氟甲基化恶唑结构单元,也是抗 HIV 药物马拉韦罗的后期中间体,这证明了这种连续氧化方法的潜在价值。