Phosphomolyhdic Acid (PMA)-SiO2 as a Heterogeneous Solid Acid Catalyst for the One-Pot Synthesis of 2H-Indazolo[1,2-b]phthalazine-triones

[摘要]：Phosphomolybdic acid (PMA)-SiO2 was found to be an efficient catalyst for the three-component condensation reaction of phthalhydrazide. 1,3-diketone, and aldehydes to produce 2H-indazolo[1,2-b]phthalazine-triones in excellent yields. The catalyst can he recovered and reused without significant loss of activity.

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