palladium on activated carbon; ammonium formate in tetrahydrofuran; water T=20°C; 28 h; Inert atmosphere;

1: 4-chloro-1-triisopropylsilanyl-1H-pyrrolo[2,3-b]pyridine With sec.-butyllithium in tetrahydrofuran; hexane; cyclohexane T=-78°C; 0.5 h; 2: benzaldehyde in tetrahydrofuran; hexane; cyclohexane T=20°C; 14 h;