Development of an Effective Chiral Auxiliary for Hydroxyalkyl Radicals
作者:Philip Garner、James T. Anderson、Philip B. Cox、Stephen J. Klippenstein、Ray Leslie、Noemi Scardovi
DOI:10.1021/jo010880f
日期:2002.8.1
development of an effective chiral auxiliary for hydroxyalkylradicals is delineated. Both the 2-tetrahydropyranyl (THP) and tri-O-benzyl-2-deoxy-alpha-D-glucopyranosyl (GLU) auxiliaries resulted in diastereoselective radical additions to methyl acrylate at -78 degrees C (ds = 6/1 and 11/1, respectively). The developing stereochemistry at the radical center was completely under auxiliary control. Correlation