The synthesis and applications of chiral pyrrolidine functionalized metal–organic frameworks and covalent-organic frameworks
Proline is a natural amino acid that can be considered as an excellent, efficient, and versatile organocatalyst for various asymmetric reactions. The encapsulation of organocatalysts, such as proline and related derivatives, into a porous material, can not only construct a novel heterogeneous catalyst but also provide a platform to mimic and explore the catalytic processes in a biological system. In this regard, metal–organic frameworks (MOFs) and covalent-organic frameworks (COFs) show superiority because of their crystalline structure, rational designable and tunable framework. In this review, we mainly focus on chiral pyrrolidine functionalized MOFs and COFs; the synthetic strategies and related applications of these materials have been summarized systematically.