C鈥揌 Bond Activations by Monoanionic, PNP-Supported Scandium Dialkyl Complexes

详细信息    查看全文

• 作者：Daniel S. Levine ; T. Don Tilley ; Richard A. Andersen
• 刊名：Organometallics
• 出版年：2015
• 出版时间：October 12, 2015
• 年：2015
• 卷：34
• 期：19
• 页码：4647-4655
• 全文大小：467K
• ISSN：1520-6041

文摘

A series of scandium dialkyl complexes, (PNP)ScR₂ (R = neopentyl, trimethylsilylmethyl), supported by the monoanionic, chelating PNP ligand (2,5-bis(dialkylphosphinomethyl)pyrrolide; alkyl = cyclohexyl, tert-butyl) was synthesized, and the reactivities of these complexes toward simple hydrocarbons was investigated. The scandium鈥揷arbon bonds undergo 蟽-bond metathesis reactions with hydrogen, and these complexes are catalysts for the hydrogenation of alkenes. Reactions with primary amines led to formation of amido complexes that undergo cyclometalation via 蟽-bond metathesis, without involvement of an imido complex intermediate. A variety of carbon鈥揾ydrogen bonds are also activated, including sp-, sp²-, and sp³-C鈥揌 bonds (intramolecularly in the latter case).