Halofluorination of N-protected α,β-dehydro-α-amino acid esters—A convenient synthesis of α-fluoro-α-amino acid derivatives
作者:Dirk Ulbrich、Constantin G. Daniliuc、Günter Haufe
DOI:10.1016/j.jfluchem.2016.06.006
日期:2016.8
N-protected dehydroamino acid methyl esters have been converted to α-fluoro-β-halo amino acid derivatives under halofluorination reaction conditions. The influences of the nitrogen protecting group of the substrates and of the halonium electrophile on the reaction outcome and the stability of the obtained products have been studied. Furthermore, reduction of the halogen substituent (Cl or Br) under
N-保护的脱氢氨基酸甲酯已在卤代氟化反应条件下转化为α-氟-β-卤代氨基酸衍生物。研究了底物的氮保护基和亲电子的卤化氢对反应结果和所得产物稳定性的影响。此外,在自由基条件下卤素取代基(Cl或Br)的还原提供了后续反应的可能性。然而,亲核取代反应失败。