Synthesis of 4-Aminotropones from [(Sulfinyl or Sulfonyl)methyl]-Substitutedp-Quinamines
作者:M. Carmen Carreño、Montserrat Ortega-Guerra、María Ribagorda、M. Jesús Sanz-Cuesta
DOI:10.1002/chem.200700940
日期:2008.1.7
evolution of which through a ring-expansion process, pushes off a methyl sulfinate anion or SO2. This efficient process fulfils the criteria of atom economy. The introduction of a proline substituent in the nitrogen of the starting p-quinamine allowed the synthesis of an enantiopure 4-aminotropone, the asymmetric Diels-Alder reactions of which with maleimide occurred in a highly endo and pi-facial