Several N,N-diformylaminomethyl ketones 3 were prepared by treating the respective bromomethyl ketone 1 with sodium diformylamide in acetonitrile at room temperature. This reaction produced N-formylaminomethyl ketones 4 when ethanol was used as the solvent. One of the formyl groups of N,N-diformylaminomethyl ketones was selectively removed by using a catalytic amount of sodium or potassium hydroxide in alcohol to the corresponding N-formylaminomethyl ketones 4. The formyl groups of both N,N-diformyl- und N-formylaminomethyl ketones could be easily removed by either 5% hydrochloric acid in ethanol or 6 N hydrochloric acid to give the corresponding aminomethyl ketone hydrochlorides 5. These reactions are general and give high yield of the products.
在室温下,用
乙腈中的二甲酰基酰胺
钠处理相应的
溴甲基酮 1,制备出几种 N,N-二甲酰
氨基甲基酮 3。 当
乙醇作为溶剂时,该反应生成 N-甲酰
氨基甲基酮 4。在
酒精中使用催化量的
氢氧化钠或
氢氧化钾,可选择性地去除 N,N-二甲酰
氨基甲基酮的一个甲酰基,生成相应的 N-甲酰
氨基甲基酮 4。N,N-二甲酰
氨基甲基酮和 N-甲酰
氨基甲基酮的甲酰基都可以用
乙醇中的 5%
盐酸或 6 N
盐酸轻松去除,得到相应的
氨基甲基酮盐酸盐 5。这些反应都是一般反应,产物收率高。