Dimethylformamide → 1-(4-fluoro-phenyl)-1H-indazole-4-carboxylic acid (6-trimethylsilanylethynyl-pyridin-3-ylmethyl)-amide

Participants

Reaction Steps

To a mixture of 1-(4-fluoro-phenyl)-1H-indazole-4-carboxylic acid (6-bromo-pyridin-3-ylmethyl)-amide (105 mg, 0.247 mmol), trimethylsilyl acetylene (0.105 mL, 0.741 mmol), copper(I) iodide (4.7 mg, 0.025 mmol) and Pd(PPh3)2Cl2 (8.7 mg, 0.012 mmol) was added triethylamine (1.0 mL) and anhydrous DMF (0.25 mL). After 16 hours, the mixture was diluted with diethyl ether (50 mL) and quenched with saturated aqueous ammonium chloride (50 mL). The organic layer was washed with saturated aqueous ammonium chloride (50 mL) and brine (50 mL), dried over MgSO4 and concentrated. The crude solid was purified by silica gel chromatography eluting with a gradient of 0-50% ethyl acetate in hexanes to afford 1-(4-fluoro-phenyl)-1H-indazole-4-carboxylic acid (6-trimethylsilanylethynyl-pyridin-3-ylmethyl)-amide as a tan solid.

Provenance & Evidence