SYNTHESIS OF METHYL 2,3-DI-O-METHYL-α-d-SIBIROSAMINIDE

Abstract
Methyl 2,3-di-o-methyl-α-d-sibirosaminide (12; methyl 4,6-dideoxy-3-c-methyl-2,3-di-o-methyl-4-methylamino-α-d-altropyranoside) has been synthesized from methyl 4,6-o-benzylidene-3-c-methyl-2-o-methyl-α-d-altropyranoside (2). The introduction of methylamino group at c-4 position was achieved by hydrogenation of methyl 6-deoxy-3-c-methyl-2,3-di-o-methyl-α-d-arabino-hexopyranosid-4-ulose oxime (8) in the ratio of 2.6:1 (altro:ido) followed by N-formylation and reduction.