Potassium phthalimide

Main Uses

Preparation of primary amines via Gabriel synthesis:

This is its most classic application. Through the steps of "reaction of potassium phthalimide with alkyl halides → hydrolysis/hydrazinolysis of N-alkyl derivatives," it efficiently synthesizes pure primary amines (avoiding by-products such as secondary amines and tertiary amines). For example: synthesis of ethylamine: \(C_8H_4KNO_2 + CH_3CH_2Br \rightarrow C_8H_4(NO_2)CH_2CH_3 + KBr\), followed by hydrolysis to obtain \(CH_3CH_2NH_2\). It is suitable for the synthesis of aliphatic primary amines, aromatic substituted primary amines, etc., and is crucial in the synthesis of pharmaceuticals and pesticides.

Organic synthesis intermediate:

Used for the preparation of amino acids: Reaction with halo-carboxylic acid esters, followed by hydrolysis, yields α-amino acids (such as glycine, alanine, etc.).

Synthesis of heterocyclic compounds: Reaction with dihalides can construct heterocyclic structures such as pyrrole and indole, used for the synthesis of drug molecular skeletons.

Other applications: Acts as a nucleophile in asymmetric synthesis to construct chiral amine compounds. Used in the dye industry to synthesize intermediates for certain functional dyes. Used to prepare functional monomers for ion exchange resins or polymer materials.

CAS NO: 1074-82-4

EC NO: 214-046-6

Molecular Formula: C₈H₄KNO₂

Molecular Weight: 185.22

Aliases: Potassium phthalimide; Potassium phthalamide; Potassium phthalimide salt; Potassium phthalimide; Potassium phthalamide; Potassium phthalimide salt;

Structural Formula: