From Berbines to Protopines: Regiocontrolled Hofmann Elimination/Hydroboration/Oxidation of N‐Substituted Berbinium Salts

From Berbines to Protopines: Regiocontrolled Hofmann Elimination/Hydroboration/Oxidation of N‐Substituted Berbinium Salts Regio‐ and Stereoselective Stevens Rearrangement of Benzyltetrahydroprotoberberinium Salts Collective Syntheses of 8-Oxoprotoberberines via Sequential In(OTf)₃-Catalyzed Cyclization and Pd(OAc)₂-Catalyzed Heck Coupling Asymmetric Synthesis of (S)-(–)-Xylopinine and (S)-(+)-Laudanosine Protopine Construction of a Protoberberine Alkaloid Skeleton via the Palladium-Catalyzed α-Arylation–Amide Formation Cascade Stereoselective Synthesis of Diastereomeric Berberine Alkaloids, O-Methylcorytenchirine and Coralydine Studies on the Chemical Synthesis of Natural Drugs Berberine Tertiary dihydroprotoberberine alkaloids of Berberis lycium Synthesis of the pentacyclic tetrahydroberberine pallimamine and epi-pallimamine