Five‐Membered Nitrogen Heterocycles Synthesis through 1,3‐Dipolar Cycloaddition of Non‐Stabilized Azomethine Ylides with 2‐Pyridone Heteroaromatic Systems as Dipolarophiles
作者:Sami Ben Salah、Morgane Sanselme、Yves Champavier、Mohamed Othman、Adam Daïch、Isabelle Chataigner、Ata Martin Lawson
DOI:10.1002/ejoc.202001404
日期:2021.1.8
3‐dipolar cycloadditions of non‐stabilized azomethine ylides with diversely substituted 2‐pyridone systems, bearing two potential C=C dipolarophilic sites was reported. The TFA‐catalyzed cycloadditions involving the in situ prepared electron‐rich 1,3‐dipole are studied according to the nature of pyridone substituents. These reactions occur in mild conditions, good yields, and show a full control of the
据报道,一系列带有两个潜在的C = C双亲性位点的,不稳定的偶氮甲亚胺的高效1,3-偶极环加成反应,带有不同取代的2-吡啶酮体系。根据吡啶酮取代基的性质,研究了TFA催化的环加成反应,该反应涉及就地制备的富电子的1,3-偶极子。这些反应在温和的条件下发生,具有良好的收率,并显示出对区域选择性的完全控制。