作者:Nilo Zanatta、Ana Wouters、Leonardo Fantinel、Fabio da Silva、Rosemário Barichello、Pedro da Silva、Daniela Ramos、Helio Bonacorso、Marcos Martins
DOI:10.1055/s-0028-1087821
日期:——
A new one-pot strategy for the synthesis of a series of new N-substituted 3-trifluoroacetyl pyrroles is presented. These compounds were obtained by the reaction of 3-trifluoroacetyl-4,5-dihydrofuran with primary amines, which generated 1,1,1-trifluoro-3-(2-hydroxyethyl)-4-alkylaminobut-3-en-2-one intermediates. In most cases these intermediates were not stable enough to be isolated. Thus, in the same
提出了一种新的一锅法合成一系列新的 N-取代 3-三氟乙酰基吡咯。这些化合物是通过 3-三氟乙酰基-4,5-二氢呋喃与伯胺反应得到的,反应生成 1,1,1-三氟-3-(2-羟乙基)-4-烷基氨基丁-3-en-2-one中间体。在大多数情况下,这些中间体不够稳定,无法分离。因此,在同一反应容器中,它们直接被 PCC(科里试剂)氧化以提供 1,1,1-三氟-3-(2-乙醛)-4-烷基氨基丁-3-en-2-ones,其中在回流下进行分子内环化,以中等产率得到所需的 N-取代 3-三氟乙酰基吡咯。