Preparation of Multivalent Carbohydrate Mimetics Based on Enantiopure 1,2-Oxazines by Sonogashira Coupling and Subsequent Reductive Ring-Opening
作者:Maja Kandziora、Hans-Ulrich Reissig
DOI:10.1002/ejoc.201403186
日期:2015.1
modular approach to aryl C-glycosides and their multivalent analogues is presented. Sonogashira coupling reactions connected the key compounds, enantiopure bicyclic 1,2-oxazine derivatives bearing p-bromophenyl substituents, with alkynes. Subsequent hydrogenolyses or a combination of hydrogenolysis and samarium diiodide mediated reductions converted the coupling products into new unnatural amino carbohydrate