Abstract A simple and efficient method for the preparation of the title compounds is described from cyanoacetamides and 3-hydroxy-3-methyl-2-butanone in the presence of sodium ethylate at room temperature. The 3-carboxamido-N-alkyl-4, 5, 5-trimethyl-5-dihy dro-2H-pyrrol-2-ones lead to unsaturated derivatives by condensation with aldehydes, while hydrogenation give rise to the corresponding pyrrolidin-2-ones
摘要 描述了在
乙醇钠存在下,在室温下,由
氰基乙酰胺和
3-羟基-3-甲基-2-丁酮制备标题化合物的一种简单有效的方法。3-甲酰胺基-N-烷基-4, 5, 5-trimethyl-5-dihy dro-2H-pyrrol-2-ones 通过与醛缩合生成不饱和衍
生物,而氢化生成相应的 pyrrolidin-2-ones .