Enantiopure alkaloid analogues and iminosugars from proline derivatives: stereocontrol in sequential processes
作者:Alicia Boto、Dácil Hernández、Rosendo Hernández
DOI:10.1016/j.tetlet.2009.04.082
日期:2009.7
use of expensive auxiliaries or catalysts in the synthesis of chiral 2-substituted pyrrolidines is described. Thus, commercial, cheap 4-(S)-hydroxyproline was readily transformed into optically pure pyrrolidines, using a one-pot decarboxylation–alkylation reaction as the key step. In this reaction, an acyliminium intermediate was generated, which was trapped by carbonnucleophiles. As postulated by