Reactions of ketene silyl acetals with imine-complexes of titanium tetrachloride. New and convenient routes to 5,6-dihydro-2-pyridones and 5-amino-2-alkenoates
作者:Stephan M. Brandstadter、Iwao Ojima、Kenji Herai
DOI:10.1016/s0040-4039(00)95794-0
日期:1987.1
The reactions of vinylketene silyl acetals (VKSAs) with imine complexes of TiCl4 give the corresponding 5,6-dihydro-2-pyridones and/or 5-amino-2-alkenoates in good to excellent yields. It is suggested that an addition-cyclization mechanism is operative for the formation of 5,6-dihydro-2-pyridones in this formal cyclocondensation reaction.
乙烯基乙烯酮甲硅烷基乙缩醛(VKSAs)与TiCl 4的亚胺配合物的反应可产生相应的5,6-二氢-2-吡啶酮和/或5-氨基-2-链烯酸酯,且收率高至优异。建议在该正式的环缩合反应中,加成环化机理可用于形成5,6-二氢-2-吡啶酮。