Water → 3-Chloro-5-fluoro-2-thiazolo[5,4-c]pyridin-2-yl-benzonitrile

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Reaction Conditions

Reaction Steps

A mixture of thiazolo[5,4-c]pyridine (0.5 g, 3.67 mmol), 2-bromo-3-chloro-5-fluorobenzonitrile (1.3 g, 5.5 mmol), Pd(PPh3)4 (0.42 g, 0.36 mmol), copper(I) iodide (70 mg, 0.37 mmol) and cesium carbonate (3.9 g, 12 mmol) in dimethylformamide (15 mL) was heated at 150° C. in a microwave reactor for 5 minutes. The cooled mixture was poured into water and extracted twice with ethyl acetate. The combined organic extracts were washed with water, dried (Na2SO4), filtered and concentrated in vacuo. The crude product was purified by chromatography on silica (10% diethylether in DCM) to yield a pale solid (0.22 g). The reaction was repeated on the same scale, and the combined product from both reactions was purified by chromatography on silica (5% diethylether in DCM) to give the title compound as an off-white solid (0.30 g, 14%). 1H NMR (300 MHz, CDCl3): δ 9.35 (s, 1H), 8.78 (d, J=6.2 Hz, 1H), 8.10 (d, J=6.2 Hz, 1H), 7.58 (dd, J=7.8, 2.5 Hz, 1H), 7.53 (dd, J=7.4, 2.5 Hz, 1H). LCMS (Method E): RT=2.78, m/z: 290 [M+H+].

Provenance & Evidence