A direct and highly convenient organocatalytic method for the preparation of 1,5-dialdo-pyranosides and 1,4-dialdo-furanosides is presented. The method relies on the chemoselective properties of TEMPO in combination with trichloroisocyanuric acid under very mild, basic conditions. Unprotected glycosides are prepared in a single step in high yields and are efficiently purified with the use of solid-phase
biomolecules was developed using C6-oxidized glycans through a carbohydrate-promoted Pictet–Spenglerreaction, providing homogeneous glycoconjugates with stable linkages. This method features high efficiency, mild conditions, robustness, biocompatibility, and applicability to a wide range of substrates, including glycans, peptides, proteins, and living-cell surfaces.
通过碳水化合物促进的 Pictet-Spengler 反应,使用 C6 氧化聚糖开发了针对生物分子 N 末端色氨酸的糖修饰策略,提供具有稳定连接的均质糖缀合物。该方法具有效率高、条件温和、稳健、生物相容性以及适用于多种底物的特点,包括聚糖、肽、蛋白质和活细胞表面。