DOI: 10.1055/a-2159-9400 ISSN:

A Golden Synthetic Approach for 2(1H-pyrrole-1yl)-aniline and pyrrolo[1,2-a]quinoxaline Through Gold-carbene Intermediate

Volkan Taşdemir, Hasan Genç, Nurettin Menges
  • Organic Chemistry

The pyrrolo[1,2-a]quinoxaline skeleton has significant potential for many biological and optical applications. Hence, in this study, unconjugated ynone derivatives are reacted with 1,2-diaminoarenes under gold-catalyzed cyclization. The reaction gives 2(1H-pyrrole-1yl)-aniline, which is a valuable starting material, and Pyrrolo[1,2-a]quinoxaline through a one-pot and single-step approach. A reaction mechanism for the formation of the pyrrolo[1,2-a]quinoxaline skeleton featuring a key gold-carbene intermediate is proposed. On the other hand, the methyl group on the C-2 position of 2(1H-pyrrole-1yl)-anilines is oxidized with SeO2, resulting in a pyrrolo[1,2-a]quinoxaline skeleton, which gives 14 different pyrrolo[1,2-a]quinoxaline derivatives.

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