Neoxaline is a fungal indoline spiroaminal alkaloid with weak central nervous system activity.
Details
Neoxaline is a prenylated indoline spiroaminal alkaloid isolated from Aspergillus japonicus. Structurally characterized by a tetracyclic indoline spiroaminal framework containing a reverse-prenyl group and a dehydrohistidine-derived unit, it represents a unique fungal alkaloid scaffold. Although it lacks antimicrobial activity, neoxaline exhibits weak central nervous system stimulant effects, indicating interaction with neuroactive pathways. It has primarily served as a structural and synthetic target, with multiple stereoselective total syntheses establishing its absolute configuration and highlighting its complex spirocyclic architecture.