Palladium-Catalyzed Intramolecular Asymmetric C–H Functionalization/Cyclization Reaction of Metallocenes: An Efficient Approach toward the Synthesis of Planar Chiral Metallocene Compounds
synthesis of planar chiral metallocene compounds is reported. The reaction stereoselectively functionalized one of the ortho C-H bonds of Cp rings by intramolecular cyclization to form indenone derivatives in high yields with excellent enantioselectivity. The mild set of reaction conditions allowed a wide variety of chiral metallocene compounds to be synthesized with broad functional group tolerance. The
Nitrenoid from Oxime: A Practical Synthesis of Planar Chiral Ferrocenyl Phenanthridines via Nitrene‐Involved Ring‐Expansion Reaction
作者:Na Li、Biqiong Hong、Jinbo Zhao、Zhenhua Gu
DOI:10.1002/anie.202215530
日期:2023.1.2
A new Grignard reagent-mediated synthesis of ferrocene-based phenanthridinesfromoximes was developed. The tertiary magnesium-zinc nitrenoid was proposed as the key intermediate, which underwent ring-expansion/rearrangement to form the pyridine skeleton.