OXIDATIVE PREPARATION OF OPTICALLY-ACTIVE N-HYDROXY-ALPHA-AMINO ACID-AMIDES

Two routes are presented for the conversion of optically active α-amino acid amides into the title compounds. One route(route A) features the formation of the Schiff's base 6 which is subsequently oxidized to the corresponding oxaziridines 7. Route B is characterized by the formation of an imidazolin 11 which is hydroxylated to compound 12. Alcoholysis of 7 and 12 in the presence of hydroxylamine hydrochloride yields the title compounds in overall yields ringing from 65 to 85%(route A) and from 14 to 21%(route B). © 1990.