TFAA‐Catalyzed Annulation Synthesis of Spiro Pyrrolo[1,2‐
<i>a</i>
]quinoxaline Derivatives from 1‐(2‐Aminophenyl)pyrroles and Benzoquinones/Ketones
作者:Jixiang Ni、Yong Jiang、Zhenjie Qi、Rulong Yan
DOI:10.1002/asia.201900567
日期:——
A metal-free trifluorosulfonate anhydride (TFAA)-catalyzed strategy for the synthesis of spiro pyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and benzoquinones/ketones has been developed. With this general method, spiro pyrrolo[1,2-a]quinoxalines have been accessed via nucleophilic addition and cyclization. This reaction exhibits good functional group tolerance, and a wide range of products