Synthesis of the Spermidine Alkaloids (−)-(2R,3R)- and (−)-(2R,3S)-3-Hydroxycelacinnine: Macrocyclization with Oxirane-Ring Opening and Inversion via Cyclic Sulfamidates
作者:Nikolai A. Khanjin、Manfred Hesse
DOI:10.1002/hlca.200390160
日期:2003.6
were achieved with trifluoroacetyl protection. Macrocyclization of the corresponding cis-oxiranes was unsuccessful for steric reasons. Inversion at OHC(3) via nucleophilic displacement of the cyclicsulfamidate derivative with NaNO2 led to (2R,3S)-macrocycles. The synthesized (−)-(2R,3S)-3-hydroxycelacinnine ((−)-1b) was identical to the natural alkaloid.