A palladium-catalyzed ring-opening reaction of optically active ferrocenyl tertiary alcohols for the construction of planar chiral ketones is reported. The stereochemistry of the hydroxyl group in ferrocenyl alcohols markedly affects reaction: ferrocenyl alcohols with a β-hydroxyl group show better reactivity and chemoselectivity than the corresponding α-hydroxyl analogues. The treatment of α-hydroxyl
Enantioselective Synthesis of Planar Chiral Ferrocenes via Pd(0)-Catalyzed Intramolecular Direct C–H Bond Arylation
作者:De-Wei Gao、Qin Yin、Qing Gu、Shu-Li You
DOI:10.1021/ja500444v
日期:2014.4.2
A highly efficient synthesis of planar chiral ferrocenes by enantioselective Pd(0)-catalyzed direct C-Harylation from readily available starting materials under mild reaction conditions was developed (up to 99% yield, 99% ee). The products can be easily transformed to the highly efficient planar ferrocene ligands, which have demonstrated high efficiency in Pd-catalyzed asymmetric allylic alkylation
Synthesis of ferrocene indanone derivatives via trinuclear N -heterocyclic carbene palladium(II)-catalyzed cyclocarbonylation of o -bromoarylferrocene
作者:Tao Wang、Renjie Wang、Wanli Wang、An'an Zhang、Lantao Liu
DOI:10.1016/j.jorganchem.2018.01.016
日期:2018.3
A new route to ferrocene indanone derivatives has been developed via the trinuclear N-heterocyclic carbene palladium(II)-catalyzed carbonylative C-C bond formation. Under a CO atmosphere, using o-bromoarylferrocene as substrate, this reaction proceeded smoothly to give the desired products in moderate to excellent yields within hours.
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.