Synthesis of lycorines by intramolecular aryne cycloadditions
摘要:
Lycorines and related compounds were obtained by a short and convergent method, based on an intramolecular Diels-Alder reaction between an azadiene and an aryne, both generated in situ.
Carboxylic Acid-Enabled Vinylene Transfer Reaction by Co(III) Catalyst: Scope and Applications to the Five-Step Total Synthesis of Protoberberine Alkaloids Containing Free Hydroxyl Group without Protection
A Co(III)-catalyzed vinylene transfer reaction enabled by carboxylic acid is presented. This redox-neutral transformation tolerates various functional groups, including free hydroxyl groups, and features practicality. Five-step routes based on the vinylene transfer reaction and Heck annulation have been devised to the totalsynthesis of 8-oxodehydrodiscretamine and 2-demethyl-oxypalmatine without the