Cyclometalated platinum(II) complexes derived from a chiral pyridine ligand: Synthesis, structure, and catalytic activity
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- Title
- Cyclometalated platinum(II) complexes derived from a chiral pyridine ligand: Synthesis, structure, and catalytic activity
- Authors
- Yoon, MS; Ryu, D; Kim, J; Ramesh, R; Ahn, KH
- Date Issued
- 2007-11-20
- Publisher
- KOREAN CHEMICAL SOC
- Abstract
- A direct cyclometalation of a chiral pyridine derivative, (5R,7R)-5,6,7,8-tetrahydro-6,6-dimethyl-2-phenyl5,7-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 H-1 and C-13 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.
- Keywords
- chiral ligand; cycloplatination; X-ray structure; C-H...CL hydrogen bonding; asymmetric reactions; CRYSTAL-STRUCTURES; PINCER COMPLEXES; HECK REACTION; PALLADIUM; BOND; SUBSTITUTION; ACTIVATION; REACTIVITY; RU
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22978
- DOI
- 10.5012/bkcs.2007.28.11.2045
- ISSN
- 0253-2964
- Article Type
- Article
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 28, no. 11, page. 2045 - 2050, 2007-11-20
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