Deprotonation Attempts on Imidazolium Salt Tethered by Substituted Phenol and Construction of Its Magnesium Complex by Transmetalation
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- 作者：Dao Zhang ; Hiroyuki Kawaguchi
- 刊名：Organometallics
- 出版年：2006
- 出版时间：October 23, 2006
- 年：2006
- 卷：25
- 期：22
- 页码：5506 - 5509
- 全文大小：128K
- 年卷期：v.25,no.22(October 23, 2006)
- ISSN：1520-6041
文摘
Several attempts to deprotonate the imidizolium salt1-methyl-3-(4,6-di-tert-butyl-2-hydroxybenzyl)imidazolium bromide, H2[CO]Br (4), tethered by substituted phenol to yieldanonic carbene species M[CO] (M = Li, Na) resulted in theformation of {Na[ON](THF)}2 (5) and {Li[ON](THF)}2 (6) (1-methyl-2-(4,6-di-tert-butyl-2-hydroxybenzyl)imidazole, H[ON])after warming to room temperature from -78 
C due to 1,2-aryloxy migration. Treatment of in-situ-generated M[CO] with1.0 equiv of MesMgBr (Mes = 2,4,6-Me3C6H2) produced a raremagnesium NHC complex, {Mg[OC](Mes)}2 (8). Both 5 and 8have been characterized by an X-ray diffraction study.
C due to 1,2-aryloxy migration. Treatment of in-situ-generated M[CO] with1.0 equiv of MesMgBr (Mes = 2,4,6-Me3C6H2) produced a raremagnesium NHC complex, {Mg[OC](Mes)}2 (8). Both 5 and 8have been characterized by an X-ray diffraction study.