Pentaerythritol as efficient H-bonding organocatalyst for synthesis of indazolo[2,1-b]phthalazine-trione derivatives

摘要

Pentaerythritol was applied as an effective, biodegradable, nontoxic, mild, and commercially available H-bonding organocatalyst for synthesis of indazolo[2,1-b]phthalazine-trione derivatives via one-pot three-component condensation of aromatic aldehydes, phthalhydrazide, and dimedone under thermal solvent-free conditions in high to excellent yield.