One-Pot Synthesis of Heteroaryl and Diheteroaryl Ketones through Palladium-Catalyzed 1,2-Addition and Oxidation
作者:Masami Kuriyama、Norihisa Hamaguchi、Keisuke Sakata、Osamu Onomura
DOI:10.1002/ejoc.201300269
日期:2013.6
was developed for the preparation of heteroaryl and diheteroaryl ketones from aldehydes and organoboronic acids through a palladium-catalyzed 1,2-addition and oxidation that uses an aryl iodide as the oxidant. This one-pot process shows high tolerance for a broad range of heterocyclic substrates by using 1.0–3.0 mol-% of the catalyst that is formed from allylpalladium chloride dimer and a thioether-imidazolinium
开发了一种合成方法,用于从醛和有机硼酸通过钯催化的 1,2-加成和氧化制备杂芳基和二杂芳基酮,该方法使用芳基碘作为氧化剂。通过使用由烯丙基氯化钯二聚体和硫醚-咪唑啉鎓氯化物形成的 1.0-3.0 摩尔% 的催化剂,这种一锅法显示出对各种杂环底物的高耐受性。除了微调催化体系外,使用在邻位具有取代基的空间位阻芳基碘化物(例如 2-碘甲苯)对于获得具有杂环部分的所需酮的收率也很重要。