The stereoselective syntheses of the antibiotics (-)-HON (5-hydroxy-4-oxo-L-norvaline, RI-331) and (+)-negamycin starting from (S)-4-[(Z)-2-(benzyloxycarbonylamino)-2-(tert-butoxycarbonyl)vinyl]-2, 2-dimethyl-1,3-dioxolane and (R)-3-benzyloxycarbonyl-5-[(Z)-2-(tert-butoxycarbonylamino)-2-(methoxycarbonyl) vinyl] -2, 2-dimethyl-1,3-oxazolidine, respectively, are described.
描述了从 (S)-4-[(Z)-2-(苄氧羰基
氨基)-2-(tert-丁氧羰基)
乙烯]-2, 2-二甲基-1,3-二氧杂烷和 (R)-3-苄氧羰基-5-[(Z)-2-(tert-丁氧羰基
氨基)-2-(甲氧羰基)
乙烯]-2, 2-二甲基-1,3-氧杂
环丁烷分别立体选择性合成抗生素 (-)-HON (5-羟基-4-氧代-L-诺瓦林,RI-331) 和 (+)-负黏素。