Acids can be converted to primary amines by:

Question

Quizplus · Accepted Answer

Acids can be converted to primary amines by two major methods: the Hofmann rearrangement and the Curtius rearrangement. In the Hofmann rearrangement, the acid is first converted to the primary amide, followed by treatment with chlorine or bromine and then sodium or potassium hydroxide to give the primary amine. This method is useful for producing primary amines from carboxylic acids that contain more than six carbon atoms. In the Curtius rearrangement, the acid is first converted to the acyl azide, followed by thermal rearrangement to the isocyanate, and then hydrolysis to the primary amine. This method is useful for producing primary amines from carboxylic acids that contain fewer than six carbons. 
Option E is the correct answer because acid is first converted into primary amide with LiAlH4 and then it is treated further with LiAlH4 to get amine. The overall reaction is as follows: acid --> primary amide --> primary amine.

Acids Can Be Converted to Primary Amines By