Shabalin Dmitrii A, Kazak Maxim K, Ushakov Igor' A, Vashchenko Alexander V, Schmidt Elena Yu
A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation.
J Org Chem. 2022 May 20;87(10):6860-6869. doi: 10.1021/acs.joc.2c00555. Epub 2022 May 4.
A convenient synthesis of pyrrolo[2,1-]isoquinolinium salts from 1-pyrrolines and alkynes through rhodium-catalyzed C-H functionalization/N-annulation tandem reaction is described. The protocol features a good substrate tolerance, mild reaction conditions, and high yields of target products. Exploration of the alkyne scope unexpectedly revealed a novel labile functional group-promoted rhodium-catalyzed C-H functionalization/C-annulation/elimination cascade reaction of 1-pyrrolines with electron-deficient alkynes.
描述了一种通过铑催化的C-H官能化/N-环化串联反应,由1-吡咯啉和炔烃便捷合成吡咯并[2,1-]异喹啉鎓盐的方法。该方法具有良好的底物耐受性、温和的反应条件以及目标产物的高产率。对炔烃范围的探索意外地揭示了一种新型的不稳定官能团促进的1-吡咯啉与缺电子炔烃的铑催化C-H官能化/C-环化/消除级联反应。