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. The rapid and environmental synthetic route to produce 1 H -indazolo[1,2-b] phthalazine-1,6,11-triones and 1 H -pyrazolo[1,2-b]phthalazine-5,10-diones derivatives have been developed via multi-component and one-pot reactions of various aldehydes, cyclic or acyclic 1,3-diketones with: i) phthalhydrazide or ii) phthalic anhy-dride-hydrazinium hydroxide using wet 2,4,6-trichlorotriazine (TCT) as catalyst under solvent-free conditions. Simple and mild reaction conditions, the use of a cheap catalyst and easy workup and isolation are notable features of this method. Key words: 1 H -Indazolo[1,2-b]phthalazine-1,6,11-triones, 1 H -pyr-azolo[1,2-b]phthalazine-5,10-diones, 2,4,6-trichlorotriazine , 1,3-dik-etones, phthalhydrazide, aldehydes, solvent-free reactions. Resumen. Se desarrollo una ruta sintetica rapida para producir deriva-dos de 1 H -indazolo[1,2-b] ftalazina-1,6,11-trionas y 1 H -pirazolo[1,2-b]ftalazina-5,10-dionas a traves de reacciones de multicomponentes, en un solo paso, de varios aldehidos, 1,3-dicetonas ciclicas o aciclicas con:

journal of the mexican chemical society

“In Situ” Generated “HCl”: A Highly Efficient Catalyst for One-Pot Synthesis of 1H-Indazolo [1,2-b]phthalazine-1,6,11-triones and 1Hpyrazolo[1,2-b]phthalazine-5,10-diones under Solvent-Free Conditions