An efficient synthesis of pyrazolo[3,4-b]pyridine-4-spiroindolinones by a three-component reaction of 5-aminopyrazoles, isatin, and cyclic β-diketones

Jairo Quiroga, Sandra Portillo, Alfredo Pérez, Jaime Gálvez, Rodrigo Abonı́a, Braulio Insuasty

Tetrahedron Letters · 2011 · 97 citations · 26 references

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