Development of a Brønsted acid Al–MIL-53 metal–organic framework catalyst and its application in [4 + 2] cycloadditions. Issue 55 (11th July 2017)

• Record Type: Journal Article
• Authors: Li, Ruilian; Jiang, Yi; Zhao, Jian; Ramella, Daniele; Peng, Yu; Luan, Yi
• Is Part Of: RSC advances. Volume 7:Issue 55(2017)
• Page Start: 34591
• Page End: 34597
• Publication Date: 2017-07-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra06201j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Two Brønsted acid Al–MIL-53 derived metal–organic frameworks were developed to serve as efficient [4 + 2] cycloaddition catalysts. Abstract : Two Al–MIL-53 derived metal–organic frameworks (MOFs) were developed to serve as efficient heterogeneous Brønsted acid catalysts. Sulfonic acid functional groups were successfully incorporated into the framework by post-synthetic modification (PSM) using commercially available reagents. The synthesized Al–MIL-53–RSO3 H and Al–MIL-53–ArSO3 H Brønsted acid–MOF catalysts were fully characterized by SEM, powder XRD, FTIR, TGA and N2 adsorption/desorption isotherms. An efficient [4 + 2] cycloaddition of 2-vinyl-substituted phenols was evaluated using the newly synthesized Al–MIL-53–RSO3 H and Al–MIL-53–ArSO3 H catalysts. The Al–MIL-53–RSO3 H and Al–MIL-53–ArSO3 H catalysts were found to be compatible with a variety of substituted substrates; finally, they can be recycled five times without compromising the yield or selectivity of the reaction.