A tandem 6π-azacyclization approach for the synthesis of diversified pyrrolo/indolo[1,2-a]quinoxalines from amino-cyclopentenones has been developed. The reaction proceeds through a trifluoroacetic-acid-mediated 6π-electrocyclization and concomitant opening of the cyclopentenone ring. The advantageous features of the developed chemistry include transition-metal-free conditions, operational simplicity
已经开发了一种用于从
氨基
环戊烯酮合成多样化
吡咯并/
吲哚[1,2- a ]
喹喔啉的串联 6π-氮杂环化方法。该反应通过
三氟乙酸介导的 6π-电环化和
环戊烯酮环的伴随打开进行。所开发
化学的优势特征包括无过渡
金属条件、操作简单和广泛的底物范围。进一步的 X 射线晶体学研究证实了稠合杂环的指定结构。