Tetraaryl-3H-Azepines: KOBut/DMSO-Catalyzed Assembly from Diaryldiynes and N-Benzylaldimines
作者:Ivan A. Bidusenko、Elena Yu. Schmidt、Darya O. Kozlova、Nadezhda I. Protsuk、Igor A. Ushakov、Irina Yu. Bagryanskaya、Vladimir B. Orel、Andrey A. Zubarev、Boris A. Trofimov
DOI:10.1021/acs.orglett.4c01531
日期:2024.6.14
smoothly react with N-benzylaldimines in a [4 + 3] cycloaddition manner under the action of the KOBut/DMSO system (60 °C, 30 min) to afford pharmaceutically relevant tetra(het)arylsubstituted 3H-azepines in up to 71% yield. The process involves the addition of azaallyl anions to one of the triple bonds of diynes followed by prototropic isomerization and cyclization of anionic intermediates with participation
在 KOBu t /DMSO 体系(60℃,30 分钟)的作用下,二(杂)芳基二炔与N-苄基醛亚胺以 [4 + 3] 环加成方式顺利反应,得到药学相关的四(杂)芳基取代的 3 H -氮杂卓收率高达 71%。该过程涉及将氮杂烯丙基阴离子加成到二炔的一个三键上,然后在第二个三键的参与下进行质子异构化和阴离子中间体的环化。级联机制与量子化学分析一致(B2PLYP-D3/6-311+G**//B3LYP-D3/6-31+G* + PCM)。