Cu-Catalyzed <i>N</i>-Arylation of Prolinamides: Access to Enantioenriched DMAP Analogues and Its Application in Black Rearrangement
作者:Lei Cao、Xing-Ping Zhang、Ming-Sheng Xie、Hai-Ming Guo
DOI:10.1021/acs.joc.2c02368
日期:2023.1.6
prolinamide’s structure had an accelerating effect on the Ullmann-type reaction. This reaction was used to construct chiral 3-amino DMAP catalysts. Furthermore, enantioenriched DMAP analogue C8 was applied in an asymmetric Black rearrangement of 2-benzofuranylcarbonates, affording 3,3-disubstituted benzofuran-2-ones in up to 96% yield and 97% ee.
CuI 催化的 3-溴-DMAP 与l-脯氨酰胺的 C-N 偶联反应在 80°C 下进行 12-16 小时,其中脯氨酰胺的结构对 Ullmann 型反应具有加速作用。该反应用于构建手性 3-氨基 DMAP 催化剂。此外,将富含对映体的 DMAP 类似物C8应用于 2-苯并呋喃碳酸酯的不对称黑色重排,以高达 96% 的收率和 97% ee 提供 3,3-二取代的苯并呋喃-2-酮。