The furan approach to azacyclic compounds

We describe an efficient new approach to the synthesis of azacyclic compounds that extends our recently developed methodology based on the oxidation of a furan ring with singlet oxygen followed by an intramolecular hetero Michael addition. The new approach gives access to the readily opened bicyclic lactones and novel tricyclic heterocycles containing the piperidine ring.

Graphical abstractDownload full-size image