Solid-phase Synthesis of Oligosaccharides Using Novel Alkyne-type Linkers: Selection of Reactive Sites on the Support by Sonogashira Reaction
作者:Koichi Fukase、Minoru Izumi、Shoichi Kusumoto
DOI:10.1055/s-2002-33605
日期:——
Two new alkyne-type linkers having alkynylmethyloxy moieties were elaborated for solid-phasesynthesis of oligosaccharides. A propargyl glycoside-type linker between a sugar residue and a solid support was formed by the Sonogashira reaction of a propargyl glycoside with polymer-supported iodobenzene. A propargyl ester-type linker was also constructed by the same reaction of a 4-(proparygyloxycarbonyl)benzyl
精心设计了两种具有炔基甲氧基部分的新型炔烃型接头,用于寡糖的固相合成。通过炔丙基糖苷与聚合物负载的碘苯的 Sonogashira 反应形成糖残基和固体支持物之间的炔丙基糖苷型接头。炔丙酯型接头也通过4-(炔丙氧基羰基)苄基糖苷与后者的相同反应构建。两种接头对酸例如 TFA 都是稳定的,但在通过用 Co 2 (CO) 8 处理转化为相应的炔-钴络合物后,可以很容易地用这种酸裂解。后一种酯接头通常是有利的,因为温和裂解释放出产物作为其易于纯化的羧基苄基糖苷。