6-Bromoquinoline → Quinoline-6-carbonitrile

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirred solution of 6-bromoquinoline (2.0 g, 9.61 mmol) in pyridine (30 mL) was added CuCN (3.0 g, 33.6 mmol) at RT under inert atmosphere. The reaction mixture was gradually heated to 200° C. and stirred for 8 h. After complete consumption of the starting material (by TLC), the reaction mixture was cooled to RT, diluted with ice-cold H2O (100 mL) and extracted with EtOAc (3×100 mL). The combined organic extracts were washed with H2O (50 mL) and brine (50 mL), dried over anhydrous Na2SO4 and concentrated under reduced pressure to obtain the crude material. Purification by silica gel column chromatography (eluting with 30% EtOAc/hexane) afforded compound I-C (1.25 g, 8.0 mmol, 83%) as white solid. 1H NMR (200 MHz, CDCl3): δ 9.08-9.05 (m, 1H), 8.25-8.19 (m, 3H), 7.86 (dd, J=8.6, 1.8 Hz, 1H), 7.55 (dd, J=8.6, 1.8 Hz, 1H). MS (ESI): 155 [M+H]+.

Herkunft & Nachweise