N-(2-Acylaminophenyl)pyrroles undergo ready cyclisation to pyrrolo[1,2-a]quinoxalines. The parent heterocycle is quaternised at the 5-nitrogen with methyl iodide, and on treatment with potassium amide yields 4-amino-pyrrolo[1,2-a]quinoxaline.
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Cheeseman et al. (1966) studied this question.