Intramolecular 5-<i>endo-</i>Trig Aminomercuration of β-Hydroxy-γ-alkenylamines: Efficient Route to a Pyrrolidine Ring and Its Application for the Synthesis of (+)-Castanospermine and Analogues
作者:Narayan S. Karanjule、Shankar D. Markad、Vaishali S. Shinde、Dilip D. Dhavale
DOI:10.1021/jo0601617
日期:2006.6.1
5-endo-trig cyclization in high yield. The sugar-substituted pyrrolidines thus obtained were elaborated to the synthesis of polyhydroxylated indolizidine alkaloids, namely, castanospermine 1a, 1-epi-castanospermine 1b, and 8a-epi-castanospermine 1c, having promising glycosidase inhibitory activities.
糖衍生的β-羟基-γ-链烯基胺8a - c的分子内氨基汞化反应以高收率进行5-内-trig环化。将由此获得的糖取代的吡咯烷精制为具有有希望的糖苷酶抑制活性的多羟基化的吲哚唑烷生物碱,即粟精胺1a,1-表-castanospermine 1b和8a-表-castanospermine 1c的合成。