conducted in high yields with high enantioselectivities using a chiral zirconium catalyst. These reactions open ways to synthetically and biologically important pyrazoline, pyrazolidine, and 1,3-diamine derivatives. Further, several experiments suggested that the reactions proceeded via concerted pathways.
使用手性
锆催化剂,腙与外部烯烃的不对称 [3+2] 环加成反应以高产率和高对映选择性成功进行。这些反应为合成和
生物学上重要的
吡唑啉、
吡唑烷和 1,3-二胺衍
生物开辟了道路。此外,一些实验表明反应是通过协同途径进行的。