A storable, powdered chiral zirconium catalyst for asymmetric aldol and hetero DielsâAlder reactions has been developed. The catalyst has the same activity as that prepared in situ even after being stored for 3 months. Moreover, this chiral Zr catalyst worked efficiently not only for asymmetric aldol reactions but also for asymmetric hetero DielsâAlder reactions affording the corresponding addition products with high enantioselectivities.
我们开发了一种用于不对称醛醇和杂环 DielsâAlder 反应的可储存粉末手性
锆催化剂。这种催化剂即使存放 3 个月,其活性也与原位制备的催化剂相同。此外,这种手性
锆催化剂不仅能有效地用于不对称醛醇反应,还能用于不对称杂环 DielsâAlder 反应,以高对映选择性生成相应的加成产物。