What question did this study set out to answer?

The aim was to synthesize and analyze a new tetrahydropyridine compound and its rearrangement.

February 28, 2026

Catalytic Rearrangement of Four Substituted Tetrahydropyridine

Key Points

The aim was to synthesize and analyze a new tetrahydropyridine compound and its rearrangement.
Synthesis of 5-acetyl-2-amino-4-(2-chloro-5-nitrophenyl)-6-oxo-1-phenyl-1,4,5,6-tetrahydropyridine-3-carbonitrile
Catalytic rearrangement using ethylenediamine
Characterization using NMR spectroscopy
Structure determination through X-ray diffraction
A new compound was successfully synthesized through a reaction involving malononitrile and aniline.
A second tetrahydropyridine compound was obtained via a catalytic rearrangement.
The structures of the synthesized compounds were confirmed using NMR spectroscopy and X-ray diffraction analysis.

Abstract

A new compound, 5-acetyl-2-amino-4-(2-chloro-5-nitrophenyl)-6-oxo-1-phenyl-1,4,5,6-tetrahydropyridine-3-carbonitrile, was synthesized by the reaction of 2-chloro-5-nitrobenzylidenemalononitrile with malononitrile and aniline. Subsequently, it was subjected to catalytic rearrangement in the presence of ethylenediamine and a second new compound, 4-(2-chloro-5-nitrophenyl)-6-oxo-2-(phenylamino)-1,4,5,6-tetrahydropyridine-3-carbonitrile, was obtained. The structure of the products was determined using NMR spectroscopy and X-ray diffraction analysis. A probable mechanism of the rearrangement reaction was proposed.

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Authors

F.N. Naghiyev

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Catalytic Rearrangement of Four Substituted Tetrahydropyridine

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Abstract

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