Microwave-assisted organic reactions: principles, solvent effects, advantages, limitations and pharmaceutical applications
Year: 2026
Type: article
Abstract: Microwave-assisted organic synthesis has emerged as an important technique for improving the efficiency of chemical reactions. Unlike conventional heating, in which heat is transferred from the external source to the reaction mixture, microwave irradiation produces heating through the interaction of electromagnetic radiation with molecules capable of absorbing microwave energy. This technique can significantly reduce reaction time, improve reaction yields, and sometimes enhance product selectivity. Microwave-assisted reactions have been successfully applied in organic synthesis, medicinal chemistry, pharmaceutical research, heterocyclic synthesis, polymer chemistry, and material science. The nature of the solvent plays a major role in microwave-assisted reactions because solvents differ considerably in their ability to absorb microwave energy. Polar solvents and ionic liquids generally respond strongly to microwave irradiation, whereas non-polar solvents show weak microwave absorption. The mechanism of microwave heating is mainly associated with dipolar polarization and ionic conduction. Microwave-assisted synthesis also offers advantages such as reduced energy consumption, shorter reaction times, improved reproducibility, and the possibility of performing reactions under solvent-free conditions. However, limitations include specialized equipment requirements, difficulties in scaling up certain reactions, pressure-related safety concerns, and the possibility of thermal effects being incorrectly attributed to specific microwave effects. This review discusses the fundamental principles, mechanism, solvent effects, merits, demerits, and important applications of microwave-assisted organic reactions.
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7212354751
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