Triethylamine → 3-(4-(4-Phenylthiazol-2-yl)but-3-yn-1-yl)benzonitrile

Participants

Reaction Steps

3-(But-3-yn-1-yl)benzonitrile (462 mg, 2.98 mmol) and 2-bromo-4-phenylthiazole (650 mg, 2.71 mmol) were taken in dry DMF (20 mL) and purged with nitrogen gas for 15 min. Et3N (1.9 mL, 13.5 mmol) was added to the reaction mixture, followed by a catalytic amount of copper iodide (51 mg, 0.27 mmol) and Pd(PPh3)4 (115 mg, 0.1 mmol). The reaction mixture was stirred at room temperature for 12 h and then quenched with water. The organic product was extracted with EtOAc, and the combined extracts were concentrated under reduced pressure. The crude product was purified by column chromatography (silica 60-120 mesh, eluant 15-20% EtOAc in petroleum ether) to get 3-(4-(4-phenylthiazol-2-yl)but-3-yn-1-yl)benzonitrile (430 mg, yield 50%) as a pale yellow solid. 1H NMR (300 MHz, CDCl3) δ 7.92-7.90 (m, 2H), 7.59-7.52 (m, 3H), 7.47-7.33 (m, 5H), 3.04-2.99 (m, 2H), 2.83-2.78 (m, 2H). MS (ESI) m/z: Calculated for C20H14N2S: 314.09. found: 315.2 (M+H)+.

Provenance & Evidence