Reference: Alves MJ, et al. (2011) Advances in the synthesis of homochiral (-)-1-azafagomine and (+)-5-epi-1-azafagomine. 1-N-phenyl carboxamide derivatives of both enantiomers of 1-azafagomine: Leads for the synthesis of active a-glycosidase inhibitors. J Org Chem 76(23):9584-92