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Preparation of 1° Amines: Gabriel Synthesis

Preparation of 1° Amines: Gabriel Synthesis

Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...

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Preparation of Amides

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Related Experiment Video

Updated: Jul 10, 2026

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

Published on: May 15, 2012

An efficient protocol for the solid-phase synthesis of malondiamides.

Markus M Vögtle¹, Andreas L Marzinzik

¹Novartis Institutes for BioMedical Research, WSJ-507, CH-4002 Basel, Switzerland.

Molecules (Basel, Switzerland)

|November 17, 2007

Summary

A new solid-phase synthesis method efficiently produces malondiamides with a free nitrogen. This versatile intermediate is ideal for creating diverse chemical libraries using split-and-mix techniques.

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Area of Science:

Organic Chemistry
Synthetic Chemistry

Background:

Malondiamides are valuable chemical intermediates.
Efficient synthesis of diverse malondiamide derivatives is crucial for drug discovery and materials science.

Purpose of the Study:

To develop a novel and straightforward solid-phase synthesis for malondiamides.
To create a method for producing malondiamides with a free nitrogen atom suitable for further derivatization.

Main Methods:

Solid-phase synthesis
Chemical derivatization

Main Results:

A novel and straightforward solid-phase synthesis of malondiamides was successfully developed.
The synthesized malondiamides, featuring a free nitrogen, were obtained in good yield and purity.
The intermediates are amenable to further derivatization.

Conclusions:

The developed solid-phase synthesis provides a robust route to functionalized malondiamides.
This method is suitable for the generation of large combinatorial libraries using split-and-mix strategies.
The approach offers a valuable tool for accelerating the discovery of new molecules.