Remarkable, Sterically Induced Rate Enhancement in the Insertion of Allenes into Palladium-Methyl Bonds

详细信息    查看全文

• 作者：Luciano Canovese ; Fabiano Visentin ; Gavino Chessa ; Paolo Uguagliati ; and Giuliano Bandoli
• 刊名：Organometallics
• 出版年：2000
• 出版时间：April 17, 2000
• 年：2000
• 卷：19
• 期：8
• 页码：1461 - 1463
• 全文大小：91K
• 年卷期：v.19,no.8(April 17, 2000)
• ISSN：1520-6041

文摘

The rate of insertion of methyl-substitutedallenes into the Pd-Me bond in chelate pyridine-thioether complexes [PdCl(Me)(R'N-SR)] (R'N-SR = 6-R'-C₅H₃N-2-CH₂SR) to give 2-methylallyl derivatives isremarkably enhanced by the presence of a methyl groupin position 6 of the pyridine ring, which induces distortion on the main coordination plane, resulting in a metalsubstrate more prone to allene insertion. The flexibilityof the sulfur-donor chelate ligand appears to be aparamount requisite.