Glycosylation reactions using a glycosyl 2-pyridinecarboxylate as a glycosyl donor were performed. Glycosyl 2-pyridinecarboxylate was designed based on a variation of the Remote Activation Concept and is activated through bidentate coordination to mild Lewis acids such as copper triflate and tin triflate. This method was effective for the glycosidation of not only glucose, but several other sugars such as the mannose-type, 2-azidosugar-type, and 2-deoxysugar-type. Various disaccharides were obtained in excellent yield by this reaction.
使用
2-吡啶甲酸糖基作为糖基供体进行了糖基化反应。2
吡啶甲酸糖基酯是根据远程活化概念的一种变体设计的,通过与温和的
路易斯酸(如三酸
铜和三酸
锡)的双叉配位而活化。这种方法不仅对
葡萄糖的糖苷化有效,而且对
甘露糖型、2-
叠氮糖型和 2-脱氧糖型等其他几种糖的糖苷化也有效。通过该反应还能以极高的产率获得各种二糖。