α-Methylene-β-amino Ketone Derivatives from β-Ketoallylsilanes
作者:M. Antonietta Loreto、Antonella Migliorini、P. Antonio Tardella
DOI:10.1021/jo052330d
日期:2006.3.1
β-Ketoallylsilanes are synthesized by the Horner−Emmons reaction starting from novel silylated ketophosphonates and various aldehydes. The reactions of β-ketoallylsilanes with NsONHCO2Et and CaO produce α-methylene-N-(ethoxycarbonyl)-β-amino ketones through the ring opening of the intermediate aziridine, which is favored by the presence of the trimethylsilyl group. With chiral β-ketoallylsilanes we