A practical approach to the fused β-carboline system. Asymmetric synthesis of indolo[2,3-a]indolizidinones via a diastereoselective intramolecular α-amidoalkylation reaction

1. Ardeo, A.
2. García, E.
3. Arrasate, S.
4. Lete, E.
5. Sotomayor, N.