One-pot synthesis of isoxazoles from enaminones: an application of Fe(II) as the catalyst for ring expansion of 2H-azirine intermediates
作者:Yunhui Zheng、Chao Yang、Daisy Zhang-Negrerie、Yunfei Du、Kang Zhao
DOI:10.1016/j.tetlet.2013.08.079
日期:2013.11
application of FeCl2 as an inexpensive, nontoxic, and efficient catalyst in a clean ring expansion reaction of 2H-azirine derivatives, an intermediate formed through the PhI(OAc)2-mediated azirination of readily available enaminones. An alternative one-pot protocol for the synthesis of various substituted isoxazoles from their corresponding enaminones has been further established based on this reaction
我们报道了FeCl 2作为廉价,无毒,有效的催化剂在2 H- azirine衍生物的清洁环扩环反应中的应用,2 H- azirine衍生物是通过PhI(OAc)2介导的易于获得的烯胺酮的叠氮反应形成的中间体。基于该反应,进一步建立了用于从其相应的烯胺酮合成各种取代的异恶唑的另一种一锅法方案,并在本文中进行了描述。