Cesium fluoride → N-(1-benzyl-1H-indazol-4-yl)-7-vinylimidazo[1,2-a]pyridine-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

A mixture of N-(1-benzyl-1H-indazol-4-yl)-7-bromoimidazo[1,2-a]pyridine-3-carboxamide (50 mg; 0.112 mmol), tributylvinyltin (43 mg; 0.13 mmol) and cesium fluoride (34 mg; 0.22 mmol) were mixed with DMF (1 mL) under nitrogen. Palladium (II) chloride (0.8 mg; 0.005 mmol), tri-tert-butylphosphine (18 mg; 0.009 mmol) and copper (I) iodide (1.7 mg; 0.009 mmol) were added and the mixture was purged with nitrogen and then heated in a sealed vessel at 45° C. for 16 hours. The mixture was added to water (30 mL) and extracted into ethyl acetate. The combined extracts were washed with water, dried (sodium sulfate) and filtered through a pad of silica. The solvent was removed under vacuum to provide a white solid which was triturated with ether to provide the desired product (27 mg) of sufficient purity to take to the next step.

Provenance & Evidence