Knoevenagel冷凝
催化作用
薗头偶联反应
化学
有机化学
有机合成
表面改性
组合化学
钯
物理化学
作者
Sharda Pasricha,Pragya Gahlot,Kavita Mittal,Devansh Rai,Nishita Avasthi,Harsimar Kaur,Shruti Rai
标识
DOI:10.1002/slct.202103674
摘要
Abstract Functionalized MCM‐41 constitute a group of potent hybrid catalysts for organic reactions. Their pore size is large enough to house large substrate molecules, the large bulk of surface silanol groups helps in introduction of a variety of functionalities required for the catalytic action. The current review emphasizes the broad methodology for the synthesis of these catalysts, effect of functionalization on reaction parameters, stability, efficiency, selectivity, reusability along with limitations of these catalysts to organic transformations, from a green chemistry standpoint. Some selected mechanisms of catalytic action are also highlighted. The review demonstrates that surface functionalized MCM‐41 constitute innovative and need based catalyst systems that catalyze reactions like Sonogashira, Suzuki, Heck, Friedel Craft reaction, Aldol and Knoevenagel condensation etc. Several other reactions like oxidation, reduction, dehydration, esterification, epoxidation, C−S, C−N, C−O and S−S coupling as well as multicomponent synthesis of bioactive heterocycles have also been reported. It is hoped that this review will improve the understanding of scientific community on how these versatile catalysts operate and will provide opportunities to further enhance their utility for chemical industry.
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