作者:Nobuyoshi Yasuda、Keiji Matsuda、Hideo Tsutsumi、Takao Takaya
DOI:10.1016/0008-6215(86)85023-6
日期:1986.1
In relation to the synthesis of antipseudomonal drugs, namely, gentamicin C2 and 3-de-O-methylsporaricin A, a protected purpurosamine B (15) and 6-epipurpurosamine B (13) were synthesized. The key intermediate, methyl 2,3,4,7- tetradeoxy-6-O-(methylsulfonyl)-2-phthalimido-beta-L-lyxo-++ +heptopyranoside (8), was obtained in 48% yield by Grignard addition to methyl 2,3,4-trideoxy-2-phthalimido-alph
关于庆大霉素C2和3-de-O-甲基孢菌素A的抗假单胞菌药物的合成,合成了保护的紫癜胺B(15)和6-表紫嘌呤胺B(13)。通过格氏添加,以48%的产率获得了关键中间体甲基2,3,4,7-四脱氧-6-O-(甲基磺酰基)-2-邻苯二甲酰亚胺-β-L-lyxo++++ +吡喃吡喃糖苷(8)。按照Cram的螯合规则,将甲基3,3,4-苯氧基-2-邻苯二甲酰基-2-邻苯二甲酰亚胺基-α-D-赤型-己二醛-1,5-吡喃基侧(7)进行,然后进行甲基磺酰化。通过从C-6处引入构型反转来引入叠氮化物基团,可以容易地从8中获得化合物15。通过在保持构型的情况下引入叠氮化物基而获得化合物13。