Applications of novel composite UiO-66-NH 2 /Melamine with phosphorous acid tags as a porous and efficient catalyst for the preparation of novel spiro-oxindoles

A new approach for the incorporation of phosphorous acid tags into a metal organic framework based on UiO-66-NH 2 /Melamine was introduced. This new catalyst was applied to the preparation of novel spiro-oxindoles under mild and green conditions.