Formation of a bridging planar trimethylenemethane dianion from a neopentyl precursor via sequential β-alkyl elimination and C-H activation

被引:30
作者
Evans, WJ [1 ]
Perotti, JM [1 ]
Ziller, JW [1 ]
机构
[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA
关键词
D O I
10.1021/ja044529y
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The reaction of neopentyllithium, Me3CCH2Li, with [(C5Me5)2Sm][(μ-Ph)2BPh2], 1, was investigated as a route to the unsolvated alkyl, [(C5Me5)2Sm(CH2CMe3)]x, and found to generate the first f element trimethylenemethane dianion complex, [(C5Me5)2Sm]2[μ-η3:η3-C(CH2)3], 2. Formation of the [C4H6]2- trimethylenemethane ligand from the [C5H11]1- neopentyl precursor can be explained by a combination of a β-methyl elimination reaction to form isobutene and [(C5Me5)2SmMe]3, 3, with subsequent C-H activation reactions. This sequence has been modeled in several ways, including the synthesis of 2 from reactions of 3 with CH2=CMe2 and 3 with the 2-methylallyl complex, (C5Me5)2Sm[CH2C(Me)CH2], 4. Copyright © 2005 American Chemical Society.
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收藏
页码:1068 / 1069
页数:2
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