Convergent synthesis of oligomannose-type glycans via step-economical construction of branch structures.
Carbohydr Res
; 525: 108764, 2023 Mar.
Article
en En
| MEDLINE
| ID: mdl-36812846
ABSTRACT
Oligomannose-type glycans on glycoproteins are important signaling molecules in the glycoprotein quality control system in the endoplasmic reticulum. Recently, free oligomannose-type glycans generated by the hydrolysis of glycoproteins or dolichol pyrophosphate-linked oligosaccharides were recognized as important signals for immunogenicity. Hence, there is a high demand for pure oligomannose-type glycans for biochemical experiments; however, the chemical synthesis of glycans to achieve high-concentration products is laborious. In this study, we demonstrate a simple and efficient synthetic strategy for oligomannose-type glycans. Sequential regioselective α-mannosylation at the C-3 and C-6 positions of 2,3,4,6-unprotected galactose residues in galactosylchitobiose derivatives was demonstrated. Subsequently, the inversion of the configuration of the two hydroxy groups at the C-2 and C-4 positions of the galactose moiety was successfully carried out. This synthetic route reduces the number of the protection-deprotection reactions and is suitable for constructing different branching patterns of oligomannose-type glycans, such as M9, M5A, and M5B.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Polisacáridos
/
Galactosa
Tipo de estudio:
Health_economic_evaluation
Idioma:
En
Año:
2023
Tipo del documento:
Article