Abstract
The regioselective reactions of N 1 -alkyl- N 2 -(4-nitrophenyl)ethanediamide with dialkyl acetylenedicarboxylates in the presence of tert -butyl isocyanide lead to dialkyl 2-{[2-(alkylamino)-2-oxoacetyl]-4-nitroanilino}-3-[( tert -butylimino)methylene]succinates in good yields.
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