Total Synthesis of (−)-Kopsifoline A and (+)-Kopsifoline E
In‐Soo Myeong, Nadide Hazal Avci, Mohammad Movassaghi
Abstract
We report the first total synthesis of (-)-kopsifoline A and (+)-kopsifoline E. Our synthetic strategy features a biogenetically inspired regioselective C17-functionalization of a versatile intermediate containing the pentacyclic core of aspidosperma alkaloids. The vinylogous urethane substructure of this intermediate affords (-)-kopsifoline D via C3-C21 bond formation under the Mitsunobu reaction conditions, while it enables selective C17-functionalization en route to (-)-kopsifoline A and (+)-kopsifoline E.
Topics & Concepts
ChemistryRegioselectivitySurface modificationTotal synthesisSubstructureMitsunobu reactionAspidospermaStereochemistryCombinatorial chemistryOrganic chemistryCatalysisIndole testPhysical chemistryStructural engineeringEngineeringChemical synthesis and alkaloidsAlkaloids: synthesis and pharmacologyAxial and Atropisomeric Chirality Synthesis