Preparation of Substituted Piperazinones via Tandem Reductive Amination−(N,N‘-Acyl Transfer)−Cyclization
摘要:
[GRAPHICS]A one-pot, tandem reductive amination-transamidation-cyclization reaction was employed to produce substituted piperazin-2-ones in good yields. Various amino acid methyl esters and transferable acyl groups were examined to establish the reaction's scope.
我们表明,现成的α-酰胺醛是分子间Rh催化炔烃加氢酰化反应的有效底物。催化剂[Rh(dppe)(C 6 H 5 F)] [BAr F 4 ]具有良好的反应活性,可将各种醛和炔烃用作底物,从而提供α-酰胺酮产品。实现了高产率和高水平的区域选择性。使用α-酰胺醛作为底物可确定1,4-二羰基可以用作Rh催化加氢酰化反应中的控制基团。