Nipate DS, Rangan K, Kumar A. Copper(II)-Catalyzed Synthesis of Pyrrolo[3,4-
b]quinolinediones from
o-Amino Carbonyl Compounds and Maleimides.
Org Lett 2023. [PMID:
36809005 DOI:
10.1021/acs.orglett.3c00240]
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Abstract
A copper(II)-catalyzed cascade synthesis of 1H-pyrrolo[3,4-b]quinoline-1,3(2H)-diones has been achieved from readily available o-amino carbonyl compounds and maleimides. This one-pot cascade strategy involves a copper-catalyzed aza-Michael addition followed by condensation and oxidation to deliver the target molecules. The protocol features a broad substrate scope and excellent functional group tolerance and affords products in moderate to good (44-88%) yields.
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