Cyclometalated Platinum(II) Complexes Derived from a Chiral Pyridine Ligand: Synthesis, Structure, and Catalytic Activity

Bulletin of the Korean chemical society

Kyo Han Ahn¹  Dowook Ryu¹  Jeongryul Kim¹  Rengan Ramesh¹  Myeong Sik Yoon¹ 

关键词: Chiral ligand;    Cycloplatination;    X-ray structure;    C-H¡¤¡¤¡¤Cl hydrogen bonding;    Asymmetric reactions;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

A direct cyclometalation of a chiral pyridine derivative, (5R,7R)-5,6,7,8-tetrahydro-6,6-dimethyl-2-phenyl- 5,7-methanoquinoline (L), with K₂PtCl₄ in acetic acid is described. A chiral mononuclear cyclometalated platinum(II) complex (6) was obtained, in which second L was simply coordinated by nitrogen. This new platinum(II) complex was characterized by ₁H and ₁₃C NMR spectroscopy, and further by X-ray crystallography. Both the solution and solid structures show C-H···Cl hydrogen bonding, which explains a distorted square-planar geometry in the solid state. A reactive cationic platinum(II) species (8) was generated from the chloro complex by treatment with silver triflate, whose catalytic efficiency was evaluated in asymmetric aldol and silylcyanation reactions of aldehydes.

【 授权许可】

Unknown