Totally synthetic analogues of siastatin B. I. Optically active 2-acetamidopiperidine derivatives.

Totally synthetic analogues of siastatin B, optically active 2-acetamido-3,4,5-trihydroxypiperidines having the nitromethyl, aminomethyl and carboxyl branched groups at C-5 have been obtained from D-ribono-1,4-lactone by a stereospecific convergent method. Some analogues showed inhibitory activity against some glycosidases.