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C 2 -Symmetric Diphosphine Ligands with Only the Planar Chirality of Ferrocene for the Palladium-Catalyzed Asymmetric Allylic Alkylation

โœ Scribed by Zhang, Wanbin; Shimanuki, Takashi; Kida, Toshiyuki; Nakatsuji, Yohji; Ikeda, Isao


Book ID
127248246
Publisher
American Chemical Society
Year
1999
Tongue
English
Weight
70 KB
Volume
64
Category
Article
ISSN
0022-3263

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Synthesis of novel planar chiral ferroce
โœ Jae Hoon Lee; Seung Uk Son; Young Keun Chung ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 243 KB

We have shown that cymantrene derivatives are better P,N-chelate ligands for palladium-catalyzed allylic alkylation than ferrocenes, which have a similar pentagonal ligand structure to cymantrene derivatives. In particular, the PPh 3 -substituted cymantrene gave a higher enantioselectivity (>98%).