[EN] METHODS OF USING SEMI-SYNTHETIC GLYCOPEPTIDES AS ANTIBACTERIAL AGENTS<br/>[FR] PROCÉDÉS D'UTILISATION DE GLYCOPEPTIDES SEMI-SYNTHÉTIQUES EN TANT QU'AGENTS ANTIBACTÉRIENS
申请人:BIOMARIN PHARM INC
公开号:WO2011140009A1
公开(公告)日:2011-11-10
Methods of using semi-synthetic glycopeptides of formula I-XIV having antibacterial activity are described.
Palladium-Catalyzed Ring Opening of Isoprene Monoxide with Nitrogen Nucleophiles - Asymmetric Synthesis of Branched Amino Sugars
作者:Barry M. Trost、Chunhui Jiang、Kristin Hammer
DOI:10.1055/s-2005-918443
日期:——
The Pd-catalyzed regio- and enantioselective ring opening of isoprene monoxide with primary amines as pronucleophiles is developed with good yield and enantioselectivity, constructing a quaternary stereocenter enantioselectively. This methodology was used as the chirality inducing key step in the asymmetric synthesis of vancosamine derivative 19. The synthesis was achieved in 9 total steps and 28.6%
The synthesis of methyl alpha-L-vancosaminide from di-O-acetyl-L-rhamnal is described. The allylic alcohol methyl 2,3,6-trideoxy-3-C-methyl-alpha-L-threo-hex-2-enopyranoside was prepared from the glycal, 1,5-anhydro-1,2,6-trideoxy-3-C-methyl-L-ribo-hex-1-enitol, and converted to its N,N-dimethylisourea derivative. The cis amino alcohol functionality in vancosamine was introduced by the electrophilic