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Chemistry

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Organic Chemistry

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Amines

Making Amines with Reductive Amination

Description

Reductive amination is a way to make amines from carbonyl compounds and primary amines. A carbonyl compound is a molecule with a carbon-oxygen double bond. The reaction first forms an imine, and then the same mixture is reduced to give a secondary amine.

Selective reducing agents make this step w...

Transcript

请记住,羰基化合物与伯胺反应可生成亚胺,后者可进一步被还原为仲胺,且无需分离中间产物。

使用另一种胺和还原剂将羰基化合物在单一反应容器中转化为胺的过程称为还原胺化。

该反应将一个C=O键替换为一个C–H键和一个C–N键。

还原胺化反应采用催化加氢或选择性氢化还原剂(如 NaBH3CN)。

由羰基化合物与伯胺缩合形成的亚胺在氮原子中心发生质子化。

接下来,NaBH3CN 将氢负离子转移至亚胺碳上,将亚胺还原为胺。

NaBH3CN 是一种 NaBH4 衍生物,但与氰基化合物不同,NaBH4 不适合用...