Synthesis of specifically monofluorinated ligands related to the O-polysaccharide of Shigella dysenteriae type 1
作者:Laurence A. Mulard、Paul Kováč、Cornelis P.J. Glaudemans
DOI:10.1016/0008-6215(94)84194-2
日期:1994.6
The synthesis is reported of galactopyranose nucleophiles monofluorinated at positions 3, 4, or 6 and protected by 4,6-O-benzylidene, 3,6-di-O-benzyl, or 3,4-O-isopropylidene groups, respectively. The condensation of these nucleophiles with 2,3,4-tri-O-benzoyl-alpha-L-rhamnosyl bromide gave, after deprotection, the disaccharide analogues of methyl O-alpha-L-rhamnopyranosyl-(1-->2)-alpha-D-galactopyranoside
据报道合成了在3、4或6位单氟化并分别由4,6-O-亚苄基,3,6-二-O-苄基或3,4-O-异亚丙基保护的半乳糖吡喃糖亲核体。这些亲核试剂与2,3,4-三-O-苯甲酰基-α-L-鼠李糖基溴缩合后,脱保护后得到甲基O-α-L-鼠李糖基-(1-> 2)-的二糖类似物。 α-D-半乳糖吡喃糖苷,在半乳糖苷残基的3、4或6位单氟化。