Asymmetric syntheses of guanidine 3 and N-aminoguanidine 4 are described from (-)-epoxy alcohol 5. Compounds 3 and 4, which resemble D-glucose and D-mannose, were designed as generic hexopyranose substitutes and represent new templates for assembling glycomimetic structures.
Synthesis of Optically Pure 2-Aziridinemethanols: Versatile Synthetic Building Blocks.
Synthesis of three cis-trans pairs of N-sulfonylated-2-aziridinemethanols starting from (S)-threonine, (R)-allothreonine, a chiral 2-amino alcohol, or enantiomerically enriched 2, 3-epoxy alcohols is described. A synthetic route to N-tosyl- and N-mesyl-2-aziridinemethanols from (R)- and (S)-serines is also presented.