Construction of Pyridine-Based Chiral Ionic Covalent Organic Frameworks as a Heterogeneous Catalyst for Promoting Asymmetric Henry Reactions,Organic Letters

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Construction of Pyridine-Based Chiral Ionic Covalent Organic Frameworks as a Heterogeneous Catalyst for Promoting Asymmetric Henry Reactions
Organic Letters ( IF 4.9 ) Pub Date : 2021-02-24 , DOI: 10.1021/acs.orglett.1c00175
Minghui Chen _{1,

2} , Jiabin Zhang ₁ , Chenxi Liu ₁ , Hongrui Li ₁ , Hewei Yang ₁ , Yaqing Feng _{1,

2,

3} , Bao Zhang _{1,

2}

Affiliation

The difficulties in the separation of products from the reaction mixture and the recovery of the organic cationic ionic liquids (OCILs) catalysts still need to be addressed. Post modification of the pyridine unit in the covalent organic framework (COF) via the formation of pyridinium salts with the chiral bromoacetate led to the chiral ionic COF with OCIL “immobilized”, which was utilized as a heterogeneous catalyst for asymmetric Henry reactions with high yield and excellent stereoselectivity.

中文翻译：

基于吡啶的手性离子共价有机骨架的构建，作为促进不对称亨利反应的多相催化剂

从反应混合物中分离产物和回收有机阳离子液体（OCIL）催化剂的困难仍然需要解决。通过与手性溴乙酸盐形成吡啶鎓盐，共价有机骨架（COF）中的吡啶单元进行后修饰，导致“固定化” OCIL的手性离子型COF被用作非均相亨利反应的多相催化剂，产率高和出色的立体选择性

更新日期：2021-03-05

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