Montmorillonite KSF and montmorillonite K-10 clays as efficient catalysts for the solventless synthesis of bismaleimides and bisphthalimides using microwave irradiation

Davood Habibi,Omid Marvi

doi:10.3998/ark.5550190.0007.d02

Abstract

Different bismaleimides and bisphthalimides were synthesized in a simple and environmentally benign method from the condensation reaction of maleic and phthalic anhydrides with different diamines on montmorillonite KSF and montmorillonite K-10 clays as solid acidic catalysts by microwave irradiations under the solvent-free conditions in good yields and short reaction times. Keyword: Bismaleimides, bisphthalimides, montmorillonite K-10 and KSF clays, microwave

Highlights

Development of the simple and general synthetic routes for widely used organic compounds from the readily available reagents is one of the major challenges in organic synthesis. Maleimides are among such types of organic compounds which belong to an important class of substrates for chemical applications especially in biological,[1,2,3] synthetic[4,5,6] and polymer chemistry.[7, 8]
In continuation of our studies on microwave-assisted reactions on solid surfaces,[21] we wish to describe a convenient and simple method for the synthesis of different bismaleimides and bisphthalimides from the condensation reaction between an appropriate mixture of maleic or phthalic anhydrides with different diamines on montmorillonite KSF and montmorillonite K-10 clays as solid acidic catalysts and microwave irradiations under the solvent-free conditions in good yields and short reaction times
Several examples (22 entries) illustrating this simple and convenient method for the synthesis of bismaleimides and bisphthalimides were summarized in table 1

Summary

Introduction

Development of the simple and general synthetic routes for widely used organic compounds from the readily available reagents is one of the major challenges in organic synthesis. Synthesis of the functionalized maleimides either by direct condensation or through the intermediate acid cyclization method gives poor yields of desired maleimide derivatives.

Results

Conclusion