(3R,7aS)-3-(TRICHLOROMETHYL)TETRAHYDROPYRROLO[1,2-C]OXAZOL-1(3H)-ONE: AN AIR AND MOISTURE STABLE REAGENT FOR THE SYNTHESIS OF OPTICALLY ACTIVE a-BRANCHED PROLINES
4-Alkyl-2-trichloromethyloxazolidin-5-ones: Valuable Precursors to Enantiomerically Pure <i>C-</i> and <i>N</i>-Protected α-Alkyl Prolines
作者:Harry Wang
DOI:10.1055/s-1999-2548
日期:1999.1
The oxazolidinones 4 represented versatile synthons that could be converted in a single step into useful proline peptido- mimetics. For example oxazolidinones 4a-d reacted with sodium methoxide by a novel mechanism that involved elimination of trichloromethyl anion from an intermediate tetrahedral adduct to af- ford N-formyl a-substituted proline methyl esters 5a-d. Alternative- ly acidic methanolysis