Abstract

The enantiodivergent synthesis of polyhydroxylated pyrrolizidines has been achieved, starting from common intermediate 1. The synthesis involved the stereoselective construction of the pyrrolizidine core unit by using intramolecular Michael cyclization reaction as the key reaction. The synthesized eight isomers were evaluated for various glycosidase inhibition effects. Compound 15 showed a moderate inhibitory activity against α-l-fucosidase and a high selectivity compared from the other glycosidases.

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