Synthesis of (−)-lentiginosine, its 8a-epimer and dihydroxylated pyrrolizidine alkaloid from d-glucose
作者:Vinod D. Chaudhari、K.S. Ajish Kumar、Dilip D. Dhavale
DOI:10.1016/j.tet.2006.02.074
日期:2006.5
intramolecular conjugate addition reaction leading to the formation of dihydroxypyrrolidine-ester 6a and monohydroxypyrrolidine-γ-lactone 6b. Intermediates 6a and 6b were efficiently converted to (−)-lentiginosine 3a, its 8a-epimer 3b, and pyrrolizidine azasugar 4 in good overall yield.