2(1H)-Pyrazinones from acyclic building blocks: methods of synthesis and further derivatizations

Pyrazinones (2(1H)-pyrazinones) are found as components of a range of natural substances and are involved in the preparation of a great number of bioactive molecules. Synthesis of such compounds, and analogues, requires knowledge of the heterocyclic properties of pyrazinones and, in particular, methods for their ring construction. This review deals with the strategies that have been developed for the synthesis of pyrazinones from acyclic precursors, especially alpha-amino acid-derived units, from the first examples in 1905 up to the most recent in 2021.

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Pyrazinones are components of natural substances and are important for the synthesis of bioactive molecules. This review summarizes the strategies developed for the synthesis of pyrazinones from acyclic precursors, particularly alpha-amino acid-derived units, from the earliest examples in 1905 to the latest research in 2021.