Question

An organic compound A, C₈H₄O₃, in dry benzene in the presence of anhydrous AlCl₃ gives compound B. The compound B on treatment with PCl₅, followed by reaction with H₂/Pd (BaSO₄) gives compound C, which on reaction with hydrazine gives a cyclic compound D (C₁₄H₁₀N₂). Identify A, B, C and D. Explain the formation of D from C.

Answer 1

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