Abstract
Publisher Summary The term peptide alkaloid was first proposed by Goutarel and coworkers. However, because these alkaloids with one known exception are cyclic, the term “cyclopeptide alkaloids” seems to be more appropriate; the lone exception (lesiodine-A) could in fact arise by secondary opening of the cyclic system. In the chapter, only those alkaloids are treated which incorporate a hydroxystyrylamino group as such or in a modified form. Consequently, lunarine (Lunaria biennis Moenchi Cruciferae) and homaline (Homalia spp.; Flacourtiaceae), which do not incorporate such a nucleus, are excluded. Also excluded are the ergot alkaloids conveniently known as peptide alkaloids, for which the term “peptide type alkaloids” was proposed, and peptides isolated from Amanita species by Wieland and co-workers. The first discovery of the cyclopeptide alkaloids was made by Goutarel and Pais, working at Gif-sur-Yvette, France, who isolated adouetines X, Y, and Z from Waltheria americana without proposing a complete structure.
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