Potassium <i>tert</i>-Butoxide Promoted Intramolecular Arylation via a Radical Pathway
作者:Daniela Sustac Roman、Yoko Takahashi、André B. Charette
DOI:10.1021/ol201160s
日期:2011.6.17
Potassium tert-butoxide mediated intramolecular cyclization of aryl ethers, amines, and amides was efficiently performed under microwave irradiation to provide the corresponding products in high regioisomeric ratios. The reaction proceeds via single-electron transfer to initiate the formation of an aryl radical, followed by a kinetically favored 5-exo-trig and subsequent ring expansion.
钾叔丁醇介导的分子内的芳基醚,胺和酰胺的环化有效地在微波辐射下进行,以提供在高比率的区域异构体的相应的产品。该反应通过单电子转移进行以引发芳基的形成,随后是动力学上有利的5 -exo-trig和随后的扩环。