Stereoselective synthesis of α-substituted ulosonic acids by magnesio-reformatsky reactions
作者:René Csuk、Christina Schröder、Claus Krieger
DOI:10.1016/s0040-4020(97)00813-2
日期:1997.9
A new method of homologation of aldonolactones allowing the incorporation of propionate units with excellent chemo- and stereoselectivity is performed by the magnesium-graphite mediated reaction between Oppolzer sultam derived α-halogenated amides and an aldonolactone.
Zinc–silver/graphite mediated Reformatsky-reaction of furanoid aldonolactones with α-bromo-esters allows the synthesis of α-substituted 3-ulosonic acids in high yields.