(5'R)-5'-Methyl-5'-[methyl (4S)-2,3-O-isopropylidene-beta-L-erythrofuranosid-4-C-yl]-imidazolidin-2',4'-dione was synthesised starting from methyl 6-deoxy-2,3-O-isopropylidene-alpha-D-lyxo-hexofuranosid-5-ulose applying the Bucherer-Bergs reaction. Its 5'-R configuration was confirmed by X-ray crystallography. Corresponding alpha-amino acid-methyl (5R)-5-amino-5-C-carboxy-5,6-dideoxy-alpha-D-lyxo-hexofuranoside
(5'R)-5'-甲基-5'-[甲基(4S)-2,3-O-异亚丙基-β-L-赤
呋喃糖苷-4-C-基]-
咪唑啉丁-2',4'-二酮应用Bucherer-Bergs反应,从甲基6-脱氧-2,3-O-异亚丙基-α-D-lyxo-己
呋喃糖苷-5-ulose开始合成。X射线晶体学证实了其5'-R构型。相应的
α-氨基酸-甲基(5R)-5-
氨基-5-C-羧基-5,6-二脱氧-α-D-lyxo-六
呋喃糖苷(替代名称:2- [甲基(4S)-2,3-由上述乙内酰
脲通过对异亚丙基的酸
水解,然后对乙内酰
脲环进行碱性
水解,得到O-异亚丙基-β-L-赤
呋喃糖苷-4-C-基] -
D-丙氨酸。完全脱保护得到5-C-羧基-6-脱氧
甘露糖霉素。类似地,甲基(5S)-5-
氨基-5-C-羧基-5