Different approaches to the asymmetric synthesis of 1,3,6-trisubstituted and 1,2,3,6-tetrasubstituted carbapenems1 from D-glucosamine
摘要:
Different stereocontrolled syntheses of optically active 1,3,6-trisubstituted and 1,2,3,6-tetrasubstituted carbapenems(1) are reported. D-glucosamine, as chiral auxiliary, trans-cinnamaldehyde and methoxyacetyl chloride were used as starting materials in the Staudinger ketene-imine monobactam formation. Radical cyclization and oxidation reactions led to the desired carbapenems.