Mimics of l-rhamnose: Analogues of rhamnopyranose containing a constituent α-amino acid at the anomeric position. A rhamnopyranose analogue of hydantocidin
摘要:
Ionic brominative oxidation of 2-amino derivatives of protected heptonolactones derived from L-rhamnose provides a key bicyclic intermediate for the synthesis of analogues of L-rhamnopyranose with spirohydantoins and spirodiketopiperazines at the anomeric position; the same intermediate can be used for the synthesis of novel glycopeptides containing a constituent rhamnopyranose amino acid. Such materials may allow an approach to new studies of diseases induced by mycobacteria, such as tuberculosis and leprosy.
Mimics ofl-rhamnose: Synthesis of C-glycosides of L-rhamnofuranose and an α-azidoester as divergent intermediates for combinatorial generation of rhamnofuranose libraries
摘要:
The ring contraction of readily available delta-lactones provides a short route to the synthesis of both epimers of C-L-rhamnofuranosides, radical bromination of which give access to an alpha-azidocarboxylate as a divergent intermediate for applying combinatorial methodology for the preparation of a wide range of mimics of L-rhamnofuranose; such materials may provide an approach to the study of the biosynthesis of the cells walls of mycobacteria such as Mycobacterium tuberculosis and M. leprae.