Synthesis of 2,3-Dihydroisoxazoles from Propargylic <i>N</i>-Hydroxylamines via Zn(II)-Catalyzed Ring-Closure Reaction
作者:Patrick Aschwanden、Doug E. Frantz、Erick M. Carreira
DOI:10.1021/ol006095r
日期:2000.7.1
A novel cyclization reaction of propargylic N-hydroxylamines to 2,3, 5-trisubstituted 2,3-dihydroisoxazoles in the presence of catalytic amounts (10 mol %) of ZnI(2) and DMAP is reported. The methodology provides a mild new approach to this useful class of substituted heterocycles that complements extant methods. The unique reactivity of the propargylic N-hydroxylamine substrates in the presence of
据报道,在催化量(10摩尔%)的ZnI(2)和DMAP存在下,炔丙基N-羟胺与2,3,5-三取代的2,3-二氢异恶唑的新型环化反应。该方法为这种有用的取代杂环类提供了一种温和的新方法,可补充现有方法。在Zn(II)和DMAP存在下,炔丙基N-羟胺底物的独特反应性可能在其他相关的炔烃环化反应中具有其他应用。