(5'R)-5'-Isobutyl-5'-[methyl (4R)-2,3-O-isopropylidene-beta-L-erythrofuranosid-4-C-yl]-imidazolidin-2',4'-dione was synthesised starting from methyl 2,3-O-isopropylidene-alpha-D-lyxo-pentodialdo-1,4-furanoside via methyl 6-deoxy-6-isopropyl-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
(5'R)-5'-异丁基-5'-[甲基(4R)-2,3-O-异亚丙基-β-L-赤
呋喃呋喃糖基-4-C-基]-
咪唑啉丁-2',4'-二酮由甲基2,3-O-异亚丙基-α-D-lyxo-pentodialdo-1,4-
呋喃糖苷经甲基6-脱氧-6-异丙基-2,3-O-异亚丙基-α-D-lyxo-合成应用Bucherer-Bergs反应生成六
呋喃糖苷5-ulose。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-6-异丙基-α-D-lyxo-六
呋喃糖苷(替代名称:2- [甲基(4R)-由上述乙内酰
脲通过对异亚丙基的酸
水解,然后将乙内酰
脲环进行碱性
水解,得到β-L-赤藓
呋喃糖苷-4-C-基] -
D-亮氨酸。还分离并鉴定了少数形成的具有5S构型的类似衍
生物。