The synthesis of a series of dienamides 5a-j using Oppolzer’s method is described. Using Rathke’s method the ketene N,O-silyl acetals 6a-j can be obtained in good yield from the corresponding dienamines. The ketene acetals are obtained free of base and free of salts. They are stable and can be stored at -20°C. The new dienes are useful reagents for tandem reactions.
描述了一系列二
烯酰胺 5a-j 的合成,采用 Oppolzer 方法。通过 Rathke 方法,可以从相应的二
烯胺中以良好的产率获得
酮烯 N,O-
硅醚 6a-j。这些
酮烯醚不含碱和盐,可自由获得。它们稳定,可以在 -20°C 下存储。这些新型二
烯是
串联反应的有用试剂。