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The hitherto unreported, highly functionalized alkyl 2-(2-hydroxy-1,3-dioxo-2,3-dihydro-1 H -inden-2-yl)-2-(3-oxo-3,4-dihydroquinoxalin-2-yl)acetate derivatives  4  have been synthesized in excellent yields via a one-pot three-component reaction of benzene-1,2-diamines, dialkyl acetylenedicarboxylates, and ninhydrin under mild conditions.

Efficient assembly of quinoxaline derivatives from benzene-1,2-diamines, dialkyl acetylenedicarboxylates and ninhydrin