Synthesis of indolizidine and pyrrolizidine alkaloids by the [2+2] cycloaddition of endocyclic enecarbamates to alkyl ketenes

Synthesis of indolizidine and pyrrolizidine alkaloids by the [2+2] cycloaddition of endocyclic enecarbamates to alkyl ketenes Synthesis of Pentahydroxylated Pyrrolizidines and Indolizidines Improved Total Synthesis of Indolizidine and Quinolizidine Alkaloids via Nickel-Catalyzed (4 + 2) Cycloaddition Dichloroketene−Chiral Olefin-Based Approach to Pyrrolizidines:  Highly Stereocontrolled Synthesis of (+)-Amphorogynine A Total Synthesis of Incarvillateine and Related Alkaloids Carbonylative lactonization via carbonyl oxygen attack: a short and selective total synthesis of uncinine and its analogues Exploiting an intramolecular Diels–Alder cyclization/dehydro-aromatization sequence for the total syntheses of ellipticines and calothrixin B Annulation of O-silyl N,O-ketene acetals with alkynes for the synthesis of dihydropyridinones and its application in concise total synthesis of phenanthroindolizidine alkaloids Synthesis of d-arabinose-derived polyhydroxylated pyrrolidine, indolizidine and pyrrolizidine alkaloids. Total synthesis of hyacinthacine A2 Concise total synthesis of (±)-pileamartines A and B