Ruthenium-Catalyzed Stereo- and Site-Selective ortho- and meta-C-H Glycosylation and Mechanistic Studies.
Angew Chem Int Ed Engl
; 61(32): e202205656, 2022 08 08.
Article
em En
| MEDLINE
| ID: mdl-35674418
C-aryl glycosides are popular basic skeletons in biochemistry and pharmaceutical chemistry. Herein, ruthenium-catalyzed highly stereo- and site-selective ortho- and meta-CAr -H glycosylation is described. A series of C-aryl pyranosides and furanosides were synthesized by this method. The strategy showed good substrate scope, and various N-heterocyclic directing groups were compatible with the reaction system. A mechanistic study suggested that the key pathway of ortho-CAr -H glycosylation might involve oxidative addition/reduction elimination, whereas aryl meta-C-H glycosylation was mediated by σ-activation. Density functional theory calculations also showed that the high stereoselectivity of meta-CAr -H glycosylation was due to steric hindrance.
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Rutênio
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2022
Tipo de documento:
Article