《Modified Amino Acid-Derived Phosphine-Imine Ligands for Palladium-Catalyzed Asymmetric Arylation of Cyclic N-Sulfonyl Imines》 was published in Advanced Synthesis & Catalysis in 2017. These research results belong to Zhou, Bo; Li, Kaizhi; Jiang, Chunhui; Lu, Yixin; Hayashi, Tamio. COA of Formula: C18H24NP The article mentions the following:
A series of chiral phosphine-imine ligands were synthesized starting with α-amino acids and examined for palladium-catalyzed asym. addition of arylboronic acids to cyclic N-sulfonyl imines. High catalytic activities (up to 99% yield) and high enantioselectivities (up to 98% ee) were achieved for cyclic N-sulfonyl aldimines and ketimines with five and six-membered ring structures. In the experiment, the researchers used many compounds, for example, (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