Visible-Light-Driven [3 + 2]/[4 + 2] Annulation Reactions of Alkenes with <i>N</i>-Aminopyridinium Salts
作者:Yu-Zhao Wang、Peng-Yu Liang、Hong-Chao Liu、Wu-Jie Lin、Pan-Pan Zhou、Wei Yu
DOI:10.1021/acs.orglett.2c02323
日期:2022.8.19
The annulation reactions of benzoamidyl radicals with alkenes were realized under visible light irradiation with fac-Ir(ppy)3 as catalyst and N-aminopyridinium salts as benzoamidyl radical precursors. The reaction can deliver two distinct types of products: in the case of vinyl arenes, [3 + 2] annulation product dihydrooxazoles were yielded exclusively; when alkyl-substituted alkenes were used, on the
以fac -Ir(ppy) 3为催化剂,N-氨基吡啶鎓盐为苯甲酰胺自由基前体,在可见光照射下实现了苯甲酰胺自由基与烯烃的环化反应。该反应可以产生两种不同类型的产物:在乙烯基芳烃的情况下,仅产生 [3 + 2] 环化产物二氢恶唑;另一方面,当使用烷基取代的烯烃时,它提供了[4 + 2]环化产物二氢异喹啉酮。通过 DFT 计算阐明了决定反应后果的因素。