Heterocyclic scaffolds represent the central framework of many biologically active compounds. The goal of this review is to present advances in the field of microwave-assisted synthesis of heterocyclic compounds that have been described in the literature since 1994. In particular, it focuses on reactions in which a heteroatom is directly participating in the bond forming process that gives rise to a heterocyclic core. The review is divided into two sections, cycloaddition and cyclization reactions, which are further classified according to ring type. These reactions are discussed from a synthetic standpoint with emphasis on comparison between microwave and conventional techniques.
Keywords: microwave technology, acylation, deprotection, cycloaddition, polarization, single-mode reactors, isoxazolidines, indolizines, diels-alder reaction, thiiranes
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