212ChemInform Abstract p-Nitrostyrene (I) undergoes (4 + 2)cycloaddition with the acetylenedicarboxylate (II) to produce the naphthalene derivative (III). Reduction of the nitro group is followed by twofold N-alkylation with the bromide (V) and diethyl sulfate (VII), yielding the aminonaphthalenedicarboxylate (VIII). This is cyclized with hydrazine (IX) to form the target hydrazide (X).
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