4-Trimethylsiloxy-1,3-oxazin-6-ones, easily generated in situ from trimethylsilylketene and acyl isocyanates, smoothly react with the enamines of cycloalkanones to give bicyclic 2-pyridones.
由三甲基甲
硅烷基
乙烯酮和酰基
异氰酸酯容易就地生成的4-Trimethylsiloxy-1,3-oxazin-6-ones与环烷酮的烯胺平稳反应,生成双环2-
吡啶酮。