Published as part of the Bürgenstock Special Section 2017 Future Stars in Organic Chemistry

Abstract

The straightforward preparation of glycosyl neoconjugates by oxime (or hydrazone) bond formation represents a key bioorthogonal tool in chemical biology. However, when this strategy is employed by reacting the reducing end of the glycan moiety, the configuration and the stereochemical information is lost due to partial (or complete) opening of the glycan cyclic hemiacetal and the formation of the corresponding opened tautomers. We have completed the synthesis of a library of glycosyl aldehydes to be used as scaffold for the synthesis of neoglycoconjugates via oxime bond formation. These glycosyl aldehydes constitute a simple and accessible alternative to avoid loss of chiral information when conjugating, by oxime (or hydrazone) bonds, the aldehyde functionality present at the reducing end of natural carbohydrates.

The straightforward preparation of glycosyl neoconjugates by oxime (or hydrazone) bond formation represents a key bioorthogonal tool in chemical biology. However, when this strategy is employed by reacting the reducing end of the glycan moiety, the configuration and the stereochemical information is lost due to partial (or complete) opening of the glycan cyclic hemiacetal and the formation of the corresponding opened tautomers. We have completed the synthesis of a library of glycosyl aldehydes to be used as scaffold for the synthesis of neoglycoconjugates via oxime bond formation. These glycosyl aldehydes constitute a simple and accessible alternative to avoid loss of chiral information when conjugating, by oxime (or hydrazone) bonds, the aldehyde functionality present at the reducing end of natural carbohydrates.

中文翻译：

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糖基醛：通过生物正交肟键形成合成新糖缀合物的新支架。

作为Bürgenstock专栏2017年有机化学中的未来之星的一部分发布

抽象的

通过肟（或）键形成直接制备糖基新缀合物代表了化学生物学中的关键生物正交工具。然而，当通过使聚糖部分的还原端反应而采用该策略时，由于聚糖环状半缩醛的部分（或完全）开放和相应的开放互变异构体的形成而失去了构型和立体化学信息。我们已经完成了糖基醛文库的合成，该文库用作通过肟键形成合成新糖缀合物的骨架。这些糖基醛构成了一种简单易用的替代方法，可避免在通过肟（或bonds）键结合天然碳水化合物的还原端所存在的醛官能度时，避免手性信息的丢失。

通过肟（或）键形成直接制备糖基新缀合物代表了化学生物学中的关键生物正交工具。然而，当通过使聚糖部分的还原端反应而采用该策略时，由于聚糖环状半缩醛的部分（或完全）开放和相应的开放互变异构体的形成而失去了构型和立体化学信息。我们已经完成了糖基醛文库的合成，该文库用作通过肟键形成合成新糖缀合物的骨架。这些糖基醛构成了一种简单易用的替代方法，可避免在通过肟（或bonds）键结合天然碳水化合物的还原端所存在的醛官能度时，避免手性信息的丢失。