Silyl stabilized azanes: reactions of lithiumbis(trimethylsilyl)hydrazine with trialkyltin halides
- 作者：Kataria ; J. ; Vasisht ; S.K. ; Sharma ; A. ; Venugopalan ; P.
- 关键词：Bis(trimethylsilyl)hydrazine ; Lithiumbis(trimethylsilyl)hydrazine ; Trialkyltin halides ; Disproportionation ; Lithiation ; Transmetallation
- 刊名：Journal of Organometallic Chemistry
- 出版年：2005
- 期刊代码：64_0022328x
- 类别：ch
- 出版时间：March 15, 2005
- 卷：690
- 期：6
- 页码：1507-1510
- 文件大小：111 K
摘要
Lithium 1,2-bis(trimethylsilyl)hydrazine (1a) reacts with Me<sub>3sub>SnCl, Et<sub>3sub>SnBr and Bu<sub>3sub>SnCl to form bis(trimethylsilyl)(trimethylstannyl)hydrazine (2a), (triethylstannyl)bis(trimethyl silyl)hydrazine (2b) and (tributylstannyl)bis(trimethylsilyl)hydrazine (2c), respectively. Compounds 2a and 2b undergo disproportionation at room temperature to form bis(trimethylsilyl)bis(trimethylstannyl)hydrazine (3a) and bis(triethylstannyl)bis(trimethylsilyl)hydrazine (3b). In contrast, 2c is highly stable and can withstand such a reaction up to 150 °C. The monostannylated products, 2a, 2b and 2c do not get lithiated at NH and instead undergo transmetallation in their reaction with RLi or Li to form lithiumbis(trimethylsilyl)hydrazine (1a).