2-Methyl-3-butyn-2-ol → HCID 67000911, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of commercially available 2-amino-5-bromopyridine (25 g, 144 mmol), 2-methyl-3-butyn-2-ol (21.2 mL, 217 mmol), Et3N (30.2 mL, 217 mmol), PdCl2(PPh3)2 (507 mg, 0.5 mol %) and PPh3 (95 mg, 0.25 mol %) in DMF (140 mL) was purged for 10 min with argon. Then Cul (83 mg, 0.3 mol %) was added and the reaction mixture was heated up to 90° C., stirring was continued at 90° C. for 16 h. Cooled to 23° C., the reaction mixture was concentrated in vacuum to remove all volatiles left a dark brown residue which was purified by flash chromatography with n-heptane and ethyl acetate to give the title compound as a brown solid (24 g, 94%, contains residual DMF). MS (ISP) 177.2 [(M+H)+].

Provenance & Evidence