Sodium Cyanide → Indole-5-carbonitrile

Beteiligte Stoffe

Reaktionsschritte

A mixture of 5-iodoindole (0.36 g; 1.48 mmol), NaCN (0.15 g; 3 mmol), Pd(Ph3)4 (0.23 g; 0.22 mmol) and CuI (0.06 g; 0.3 mmol) in anhydrous CH3CN (3 ml) was refluxed for 2.5 h under N2. After cooling to room temperature, the mixture was diluted to 20 ml with EtOAc and filtered through a pad of Celite. The filtrate was washed with H2O, brine, dried over anhydrous MgSO4 and filtered. The filtrate was evaporated to dryness under reduced pressure, dissolved in a small volume of CH2Cl2 and filtered through a small pad of SiO2, which was washed with fresh CH2Cl2. The combined filtrates were evaporated to dryness under reduced pressure to give the title compound (0.2 g; 95%) as colourless solid. 1H-NMR (CDCl3) 6.62 (tr, 1H, J=2.5 Hz); 7.33 (tr, 1H, J=2.5 Hz); 7.39-7.47 (m, 2H); 7.98 (s, 1H); 8.51 (broad s, 1H).

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