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
Ring expansion of sulfur substituted p-quinamines: regiospecific synthesis of 4-aminotropones
作者:M. Carmen Carreño、M. Jesús Sanz-Cuesta、María Ribagorda
DOI:10.1039/b414666b
日期:——
Synthesis of 4-aminotropones through a cyclization-ring expansion process occurs in a single step and with excellent yields from 4-amino-2,5-cyclohexadienones (p-quinamines) bearing a 4-sulfinyl or sulfonyl methyl group.