Polar [3 + 2] cycloaddition of isatin-3-imines with electrophilically activated heteroaromatic N-ylides: Synthesis of spirocyclic imidazo[1,2-a]pyridine and isoquinoline derivatives
A new synthesis of spiro[imidazo[1,2-a]pyridine-2,3′-indoline]-2′-ones 3a-f and spiro[imidazo[1,2-a]isoquinoline-2,3′-indolin]-2′-ones 5a-d, respectively by polar [3 + 2] cycloaddition reactions of isatin-3-imines with pyridinium and isoquinolinium ylides which are derived from 2-bromoacetophenone,...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-12-01
|
| Series: | Arabian Journal of Chemistry |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535215001719 |