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Immobilization of Acid-base cooperative catalyst on MCM-41 as a heterogeneous approach for asymmetric cyanoethoxycarbonylation of isatins

Abstract

A novel, highly efficient and recyclable quinine thiourea based catalyst grafted on MCM-41 mesoporous silica was synthesized and explore as a heterogeneous catalyst for cyanoethoxycarbonylation of isatin. MCM-41 has a high specific surface area and pore volume which allow maximum catalytic centre to incorporate into pores. The catalyst was characterized by various sophisticated analytical technique viz X-ray powder diffraction (XRD), TEM, Thermogravimetric analysis (TGA), FTIR, BET surface area analysis, 13C CP-MAS NMR spectroscopy. The catalyst found efficient for various isatin derivatives to give good yield and enanioselectivity upto 98%. Further catalyst works well up to five cycle without losing its merit.

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Publication details

The article was received on 15 May 2019, accepted on 12 Aug 2019 and first published on 14 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ02515D
New J. Chem., 2019, Accepted Manuscript

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    Immobilization of Acid-base cooperative catalyst on MCM-41 as a heterogeneous approach for asymmetric cyanoethoxycarbonylation of isatins

    A. ANSARI, P. Patel, G. Kumar and N. H. Khan, New J. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9NJ02515D

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