Abstract
Methodology involving stereoselective aza-Michael addition and ring-closing metathesis
as key steps has been developed for the preparation of (2R)-pipecolic acid, (2R)-proline, (2R,3S,4R)-3,4-dihydroxyproline, and the known glycosidase inhibiting azasugar 1,4-dideoxy-1,4-imino-d-talitol from a common starting material namely (R)-cyclohexylideneglyceraldehyde in good overall yields.
Key words
amino acids - chiral pool - metathesis - Michael addition - stereoselective synthesis