Synthesis of Isoxazoline/Cyclic Nitrone-Featured Methylenes Using Unsaturated Ketoximes: A Dual Role of TEMPO
作者:Fei Chen、Xiu-Long Yang、Zhi-Wei Wu、Bing Han
DOI:10.1021/acs.joc.6b00180
日期:2016.4.1
A novel, metal-free, and regioselective approach for the synthesis of isoxazoline/cyclic nitrone-featured methylenes has been developed by the reaction of readily accessible β,γ- and γ,δ-unsaturated ketoximes with TEMPO via tandem iminoxyl radical-promoted cyclization/TEMPO-mediated Cope-like elimination, respectively. This protocol utilizes commercially available TEMPO as the iminoxyl radical initiator
通过串联的亚氨基氧基自由基促进的环化反应,容易获得的β,γ-和γ,δ-不饱和酮肟与TEMPO的反应,已经开发出一种新颖的,无金属的,区域选择性的合成异恶唑啉/环状硝酮特征的亚甲基的方法。 / TEMPO介导的Cope样消除。该方案利用市售的TEMPO作为亚胺基自由基引发剂以及Cope样消除中的β-氢受体。