Conjugation of daunorubicin (1) with spacered N-β-glycosides of lactose containing from one to three oligosaccharide moieties, lacto-N-tetraose, and melibiose, was carried out. The synthesis was conducted via N-monoalkylation of hydrochloride 1 in aqueous DMF in the presence of NaHCO3 by treatment with bromoacetyl derivatives of oligosaccharide N-glycosides: β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2NHCOCH2Br, (β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2)2N(COCH2NH)2COCH2Br, (β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2)2NCOCH2-(β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2)N(COCH2NH)2COCH2Br, β-d-Galp-(1→3)-β-d-GlcpNAc-(1→3)-β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2NHCOCH2Br, α-d-Galp-(1→6)-β-d-Glcp-NHCOCH2NHCOCH2Br. The corresponding daunorubicin glycoconjugates were obtained as hydrochlorides in ∼40% yields.
                                    将
柔红霉素(1)与含有一至三个
寡糖基团、
乳糖-N-四糖和
棉子糖的间隔N-
β-乳糖苷结合。通过在NaHCO3存在下,用
寡糖N-糖苷的
溴乙酰衍
生物处理
盐酸1,在
DMF水溶液中进行N-单烷基化合成:β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2NHCOCH2Br、(β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2)2N(COCH2NH)2COCH2Br、(β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2)2NCOCH2-(β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2)N(COCH2NH)2COCH2Br、β-d-Galp-(1→3)-β-d-GlcpNAc-(1→3)-β-d-Galp-(1→4)-β-d-Glcp-NHCOCH2NHCOCH2Br、α-d-Galp-(1→6)-β-d-Glcp-NHCOCH2NHCOCH2Br。以约4