Chemistry is a science major with cience and engineering. The main research directions are chemical synthesis, new energy materials, nano-ceramics, nano-hybrid composite materials, preparation and modification of special coatings, In an article, 31886-57-4, name is (S)-N,N-Dimethyl-1-ferrocenylethylamine, introducing its new discovery. HPLC of Formula: C14H19FeN
Starting from (eta5-acetylcyclopentadienyl)(eta4-tetraphenylcyclobutadiene)cobalt(I), highly enantioselective (99 % ee) (S)-CBS catalysed ketone reduction followed by stereospecific alcohol-azide exchange, azide reduction and dimethyllation gave (R)-(eta5-alpha-N,N-dimethylaminoethylcyclopentadienyl)(eta4-tetraphenylcyclobutadiene) cobalt(I) (Arthurs? amine). This underwent highly diastereoselective cyclopalladation to give di-mu-acetate-bis-(R)-[(eta5-(Sp)-2-(alpha-N,N-dimethylaminoethyl)cyclopentadienyl, 1-C, N)(eta4-tetraphenylcyclobutadiene)cobalt(I)]dipalladium, and highly diastereoselective lithiation to give (R)-(eta5-(Sp)-1-(alpha-N,N-dimethylaminoethyl)-2-(diphenylphosphino)cyclopentadienyl)(eta4-tetraphenylcyclobutadiene)cobalt(I) (PPCA) following the addition as electrophile of chlorodiphenylphosphine. This PN-ligand was converted into (R)-(eta5-(Sp)-1-(alpha-dicyclohexylphosphinoethyl)-2-(diphenylphosphino)cyclopentadienyl)(eta4-tetraphenylcyclobutadiene)cobalt(I), a PP-ligand (Rossiphos), by stereospecific amine-phosphine exchange using HPCy2. These air-stable P?N and P?P complexes are the first examples of a new class of bulky planar chiral ligands for application in asymmetric catalysis.
In conclusion, we affirm that quantitative kinetic descriptions of catalytic behavior continue to serve as an indispensable tool to navigate research efforts intended to model. If you are interested in 31886-57-4, you can contact me at any time and look forward to more communication. HPLC of Formula: C14H19FeN
Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis