Synthesis of galactosaminyl D-chiro-inositols.

All six isomeric D-galactosaminopyranosyl-D-chiro-inositols have been prepared by glycosylation of appropriate penta-O-benzyl-D-chiro-inositols. The three requisite protected D-chiro-inositols were prepared by SmI2-promoted pinacol coupling of dialdehydes derived ultimately from L-arabinose.