Synthesis of d-Fagomine and Its Seven- and Eight-Membered Higher-Ring Analogues, and the Formal Synthesis of (+)-Australine from l-Xylose-Derived Chiron
作者:Arun Shaw、Pintu Das、Sama Ajay
DOI:10.1055/s-0035-1562438
日期:——
this work. Abstract The synthesis of d-fagomine and its seven- and eight-membered higher-ring analogues from commercially available l-xylose is reported. The syntheses involve elaboration of a common alkenol precursor obtained from l-xylose-derived hemiacetal. The key steps in the syntheses are intramolecular reductive amination and ring-closing metathesis for the synthesis of d-fagomine and seven-/eight-membered
The synthesis of (+)-fagomine, based on the Pd-catalyzed methoxycarbonylation reaction of a lactam-derived vinylphosphate and the stereoselective hydroboration-oxidation of the enamine double bond, is presented. The target product is obtained in 23% overall yield in eight steps from a known lactam.
Chemistry of Imino Glycals: Preparation and Application to the Synthesis of (+)-Fagomine
作者:Jérôme Désiré、Paul J. Dransfield、Paul M. Gore、Michael Shipman
DOI:10.1055/s-2001-16039
日期:——
The synthesis of imino glucal 2 from tri-O-benzyl-d-glucal in 8 steps is described. This novel imino sugar building block is further converted into (+)-fagomine by a two-step hydrogenation sequence.