Journal
INORGANIC CHEMISTRY
Volume 59, Issue 12, Pages 7991-8001Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c00065
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Funding
- National Natural Science Foundation of China [21001024, 21471031]
- Natural Science Foundation of Jiangsu Province [BK2011587, BK20131289]
- Teaching and Research Program for the Excellent Young Teachers of Southeast University [2242015R30026]
- Fundamental Research Funds for the Central Universities
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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The design and development of site-isolating and multifunctional catalysts for multistep sequential reactions at the molecular level is a significant challenge. Herein, we first report bifunctional metal NPs@chiral MOFs catalysts for asymmetric sequential reactions. Pd nanoparticles and chiral proline were successfully added to NH2-UiO-66 to construct two chiral bifunctional catalysts, in which active Pd nanoparticles were encapsulated into the frameworks via the bottle-around-ship method, and chiral proline was introduced into NH2-UiO-66 by coordination to zirconium nodes and postsynthetic modification (PSM) of the organic linkers. The chiral proline-decorated bifunctional Pd@NH2-UiO-66 catalysts were applied to sequential Suzuki coupling/asymmetric aldol reactions with excellent coupling performance (yields up to 99.9%) and good enantioselectivities (ee(anti) values up to 97%). The heterogeneous catalyst by coordination of proline can be reused, and the reaction activity was not significantly reduced after four cycles.
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