Catalytic silylotropy inN-trimethylsilylpyrazole derivatives |
| |
Authors: | V. A. Lopyrev L. I. Larina A. I. Albanov M. S. Sorokin G. V. Dolgushin |
| |
Affiliation: | (1) Irkutsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, l ul. Favorskogo, 664033 Irkutsk, Russian Federation |
| |
Abstract: | Silylotropy in 4-substitutedN-trimethylsilypyrazoles is studied by dynamic1H,13C, and29Si NMR spectroscopy. The catalytic 1,2-migration of a trimethylsilyl group in 4-halo-N-trimethylsilylpyrazoles was detected. Silylotropy inN-trimethylsilylpyrazoles in the presence of halogens of trimethylhalosilanes is believed to proceed through formation ofN,N-bis(trimethylsilyl)pyrazolium salts, the barrier of silylotropy in pyrazoles being markedly reduced.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 3011–3013, December, 1996. |
| |
Keywords: | silylotropy, dynamic1H,13C, and29Si NMR N-trimethylsilylpyrazoles, halogens, trimethylhalosilanes |
本文献已被 SpringerLink 等数据库收录! |
|