SO 3 H-functionalized mesoporous silica materials as solid acid catalyst for facile and solvent-free synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11-trione derivatives

SO 3 H-functionalized mesoporous silica materials were used to synthesize 2 H -indazolo[2,1- b ]phthalazine-1,6,11-trione derivatives in a one-pot three-component condensation reaction.