Ito, Masato; Osaku, Akihide; Kobayashi, Chika; Shiibashi, Akira; Ikariya, Takao published an article on January 26 ,2009. The article was titled 《A Convenient Method for the Synthesis of Protic 2-(Tertiary phosphino)-1-amines and Their Cp*RuCl Complexes》, and you may find the article in Organometallics.COA of Formula: C18H24NP The information in the text is summarized as follows:
A variety of protic 2-(tertiary phosphino)-1-amines (R2PCH2CHR’NHR”, P-NH) were prepared from 2-oxazolidinones and secondary phosphines using a newly developed acid-promoted decarboxylative C-P bond formation reaction. Treatment of the resulting chiral P-NH compounds with Cp*RuCl(isoprene) in CH2Cl2 smoothly furnished chiral Cp*RuCl(P-NH) complexes with a typical three-legged piano-stool structure, which prove to be excellent catalyst precursors for asym. reactions, including the isomerization of allylic alcs. and hydrogenation of imides. After reading the article, we found that the author used (S)-1-(Diphenylphosphino)-3,3-dimethylbutan-2-amine(cas: 286454-86-2COA of Formula: C18H24NP)
(S)-1-(Diphenylphosphino)-3,3-dimethylbutan-2-amine(cas:286454-86-2) is one of aminophosphine type ligands. An increased interest in aminophosphine type ligands used for asymmetric synthesis has been witnessed.COA of Formula: C18H24NP This growth in popularity of aminophosphine ligands in asymmetric synthesis is in part due to the growing number of convenient synthetic pathways leading to useful ligand sets.
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis