摘要:
Two gamma- hydroxy-isoleucine stereoisomers 8 (2R, 3R, 4R), and 14 (2S, 3R, 4R) as well as their corresponding gamma- lactones 9 and 15 were synthesized using a tandem, Me3Al induced opening of the epoxide and pyranoside rings of benzyl 2,3-anhydro-4-O-(tert-butyldimethylsilyl)-beta-L-ribopyranoside (1). The structure of the lactone hydrochloride 9 was confirmed by an X-ray crystal structure determination.