Synthesis of 4-Isoxazolines through Gold(I)-Catalyzed Cyclization of Propargylic <i>N</i>-Hydroxylamines
作者:B. Chandrasekhar、Sewon Ahn、Jae-Sang Ryu
DOI:10.1021/acs.joc.6b01499
日期:2016.8.5
New catalytic methods for the synthesis of 4-isoxazolines have been developed via catalytic intramolecular cyclizations of propargylic N-hydroxylamines. The reactions proceed rapidly in less than 1 h at room temperature in the presence of 5 mol % (PPh3)AuCl/5 mol % AgOTf or 5 mol % (PPh3)AuNTf2. This process features an efficient route to 4-isoxazolines with high yields, short reaction times, and mild
通过炔丙基N-羟胺的催化分子内环化,已经开发了用于合成4-异恶唑啉的新的催化方法。在存在5 mol%(PPh 3)AuCl / 5 mol%AgOTf或5 mol%(PPh 3)AuNTf 2的情况下,反应在室温下不到1小时内即可快速进行。该方法具有高产率,短反应时间和温和反应条件的高效合成4-异恶唑啉的途径。