Asymmetric Synthesis of Planar Chiral Ferrocenes by Enantioselective Intramolecular C-H Arylation of N-(2-Haloaryl)ferrocenecarboxamides was written by Liu, Lantao;Zhang, An-An;Zhao, Rui-Juan;Li, Feng;Meng, Tuan-Jie;Ishida, Naoki;Murakami, Masahiro;Zhao, Wen-Xian. And the article was included in Organic Letters in 2014.HPLC of Formula: 252288-04-3 This article mentions the following:
The palladium-catalyzed intramol. C-H arylation reaction of N-(2-bromoaryl)ferrocenecarboxamides furnishes planar chiral ferrocene derivatives TADDOL-derived phosphoramide ligands induce enantioselectivities ranging from 91:9 to 98:2 er. In the experiment, the researchers used many compounds, for example, (11bS)-N,N-Diethyldinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine (cas: 252288-04-3HPLC of Formula: 252288-04-3).
(11bS)-N,N-Diethyldinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine (cas: 252288-04-3) belongs to chiral phosphine ligands. At present, the synthesis of new chiral phosphines designed specifically for nucleophilic organocatalysis remains a significant challenge. Chiral ligands coordinate to metal centers to create an asymmetric environment around the reaction centers, which eventually affects enantioselectivity and reaction rate.HPLC of Formula: 252288-04-3
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis