Silylated β-enaminones as precursors in the regioselective synthesis of silyl pyrazoles
作者:Mariola Calle、Luis A. Calvo、Alfonso González-Ortega、Ana M. González-Nogal
DOI:10.1016/j.tet.2005.10.001
日期:2006.1
Silyl β-enaminones have been synthesized by reductive cleavage of 5-silyl, 3-, 4- and 5-silylmethylisoxazoles.These versatile synthons bearing different silyl groups in various positions of the enaminoketonic system are of great interest in the regioselective synthesis of 3- or 5-silylpyrazoles and 3-, 4- or 5-silylmethylpyrazoles, which can serve as building blocks in heterocyclic chemistry.
甲硅烷基β-烯胺酮是通过还原裂解5-甲硅烷基,3-,4-和5-甲硅烷基甲基异恶唑而合成的。这些在烯胺酮体系的各个位置带有不同甲硅烷基的通用合成子对3-位区域选择性合成非常感兴趣。或5-甲硅烷基吡唑和3-,4-或5-甲硅烷基甲基吡唑,它们可以作为杂环化学的基础。