Stereoselective synthesis of (−)-lepadins A–C†
Abstract
A concise synthesis of the marine alkaloids (−)-lepadins A–C from a phenylglycinol-derived tricyclic lactam is reported. Key steps from the stereochemical standpoint involve stereoselective cyclocondensation, double bond hydrogenation, oxazolidine opening, hydroboration–oxidation, and Horner–Wadsworth–Emmons reactions.