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.