描述了炔烃硝化螺环化的新方法。该方法涉及使用叔丁基醚(亚硝酸叔丁酯)与水作为硝基源和TEMPO [[2,2,6,6-四甲基哌啶-1-基]的自由基攻击途径引发的炔烃的氧化双官能化。)氧基]作为引发剂,和它代表氧化炔difunctionalization的一个新的例子经由形成ç N / C C键的的硝基烯烃组件容纳单元-螺环。
Metal-Free Oxidative <i>Ipso</i>-Carboacylation of Alkynes: Synthesis of 3-Acylspiro[4,5]trienones from <i>N</i>-Arylpropiolamides and Aldehydes
作者:Xuan-Hui Ouyang、Ren-Jie Song、Yang Li、Bang Liu、Jin-Heng Li
DOI:10.1021/jo5005982
日期:2014.5.16
A general and metal-free radical route to synthesis of 3-acylspiro[4,5]trienones is established that utilizes TBHP (tert-butyl hydrogenperwdde) as an oxidation and a reaction partner to trigger the oxidative ipso-carboacylation of N-arylpropiolamides with aldehydes. This method offers a new difunctionalization of alkynes through oxidative cross coupling of the aldehyde C(sp(2))-H bond with an ipso-aromatic carbon.