首页> 外文期刊>Chemistry: A European journal >Synthesis of large ring macrocycles (12-18) by recyclable palladium-complexed dendrimers on silica gel catalyzed intramolecular cyclocarbonylation reactions
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Synthesis of large ring macrocycles (12-18) by recyclable palladium-complexed dendrimers on silica gel catalyzed intramolecular cyclocarbonylation reactions

机译:硅胶催化分子内环羰基化反应中可回收钯复合树枝状大分子合成大环大环(12-18)

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摘要

Intramolecular cyclocarbonylation reactions with palladium-complexed dendrimers on silica gel as catalysts are very effective for the synthesis of twelve-to eighteen-membered ring macrocycles. This process can tolerate a wide variety of functional groups, including halide, ether, ketone, and ester. The heterogeneous dendritic catalysts facilitate excellent substrate reactivity, affording oxygen-, nitrogen-, or sulfur-containing tricyclic heterocycles in 70-92% yields. Importantly, these systems are easily recovered by simple filtration and reused several times with only a slight loss of activity.
机译:用钯配合物的树枝状大分子在硅胶上作为催化剂的分子内环羰基化反应对于合成十二至十八元环大环非常有效。该过程可以耐受多种官能团,包括卤化物,醚,酮和酯。非均相的树枝状催化剂促进了优异的底物反应性,以70-92%的收率提供了含氧,氮或硫的三环杂环。重要的是,这些系统很容易通过简单的过滤就可以回收,并可以重复使用几次,而只损失少量活性。

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