Elemental Sulfur Mediated Synthesis of Pyrrolo[1,2-a]quinoxalines from 1-(2-Nitroaryl)pyrroles
作者:Tung T. Nguyen、Nam T. S. Phan、Tuan H. Ho、Nhu T. A. Phan、Thuyen T. C. Ho、Duyen L. M. Tran
DOI:10.1055/a-1534-0466
日期:2021.11
Methods to afford pyrrolo[1,2-a]quinoxalines often require the use of prefunctionalized aniline precursors, transition metals, and/or harsh conditions. Herein we describe a simple coupling of 1-(2-nitroaryl)pyrroles and arylacetic acids, in the presence of elemental sulfur, to furnish the fused heterocycles in good yields. The conditions are compatible with many functionalities including ester, nitrile
提供吡咯并[1,2-a]喹喔啉的方法通常需要使用预官能化的苯胺前体、过渡金属和/或苛刻的条件。在本文中,我们描述了 1-(2-硝基芳基) 吡咯和芳基乙酸在元素硫存在下的简单偶联,以提供高产率的稠合杂环。这些条件与许多官能团兼容,包括酯、腈、卤素和硝基。还尝试使用苯甲醇和甲基吡啶偶联剂。