Asymmetric catalysis has emerged as a general and powerful approach for constructing chiral compounds in an enantioselective manner. Hence, developing novel chiral ligands and catalysts that can effectively induce asymmetry in reactions is crucial in modern chemical synthesis. Among such chiral ligands and catalysts, chiral dienes and their metal complexes have received increased attention, and a great progress has been made over the past two decades. This review provides comprehensive and critical information on the essential aspects of chiral diene ligands and their importance in asymmetric catalysis. The literature covered ranges from August 2003 (when the first effective chiral diene ligand for asymmetric catalysis was reported) to October 2021. This review is divided into two parts. In the first part, the chiral diene ligands are categorized according to their structures, and their preparation methods are summarized. In the second part, their applications in asymmetric transformations are presented according to the reaction types.

中文翻译：

---

不对称催化中的手性二烯配体

不对称催化已成为一种以对映选择性方式构建手性化合物的通用且有效的方法。因此，开发能够有效诱导反应不对称的新型手性配体和催化剂对于现代化学合成至关重要。在这些手性配体和催化剂中，手性二烯及其金属配合物越来越受到关注，并在过去的二十年中取得了长足的进步。本综述提供了关于手性二烯配体的基本方面及其在不对称催化中的重要性的全面和关键信息。涵盖的文献范围从 2003 年 8 月（当报道了第一个用于不对称催化的有效手性二烯配体时）到 2021 年 10 月。这篇综述分为两部分。在第一部分，对手性二烯配体按结构进行分类，总结了其制备方法。第二部分根据反应类型介绍了它们在不对称变换中的应用。