First Author:Wenqian Yu

Correspondence Author:Hong-bin Sun

Co author:Yiming Wang,Xin Chen,Rongxiu Guo,Tong Jiang,Cengceng Du,Wenhui Zhang,Yuqing Liu,Chengrui Li, Tianchen Han,Hong Li,Yongjian Ai

Journal:Microporous and Mesoporous Materials

Volume:363

Impact Factor:4.8

DOI number:10.1016/j.micromeso.2023.112828

Affiliation of Author(s):Department of ChemistryNortheastern University

Teaching and Research Group:物理化学

Place of Publication:NETHERLANDS

Abstract:Developing confined heterogeneous catalytic systems with diverse and evenly dispersed active sites is a hot research topic for various applications. However, the issues related to the agglomeration of active nanoparticles, spatial distribution uniformity of active nanoparticles, and coverage of active sites with the participation of surfactant or organic ligand restrict the activity or selectivity. In this work, a confined catalyst Pd(PPh3)4@MOF-808-150 was successfully prepared through a host-guest assembling strategy followed by thermal activation to enhance the rigidity of the catalyst. The synthesized catalyst is employed to generate β-ketoenamines in the cascade reaction involving nitro-reduction and sequential condensation. This catalyst effectively resolves the electronic preference conflict of the two catalytic steps by isolating the different active sites, demonstrating excellent activity and high chemoselectivity. It is generally applicable to the synthesis of many β-ketoenamines, with up to 16 kinds of products that have been successfully prepared with conversion and selectivity up to 99%. The extended synthesis method holds significant potential for developing the nanoconfined catalyst without surfactant encapsulation.

Key Words:Confined catalyst ;Cascade reaction ;Synergistic effect ;Metal-organic frameworks ;Extended “boat-around-ship” ;β-ketoenamines

Document Code:WOS:001092997700001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:112828

ISSN No.:1387-1811

Translation or Not:no