Oxalyl chloride → HCID 67499273, compound

Participants

Reaction Steps

To a solution 2-methyl-3-(methylthio)butanoic acid (0.154 g, 1.039 mmol) in dichloromethane (1 mL) at room temperature was added 1 drop of dimethylformamide. Oxalyl dichloride (0.178 ml, 2.078 mmol) was added dropwise and the reaction was stirred at room temperature overnight. The solvent was removed under reduced pressure. The residue was redissolved in dichloromethane (1 mL) and the solvent was removed under reduced pressure. The residue was redissolved in dichloromethane (0.5 mL) and the solution was added to a solution of 3-chloro-N-ethyl-1-(5-fluoropyridin-3-yl)-1H-pyrazol-4-amine (0.100 g, 0.416 mmol) and 4-dimethylaminopyridine (0.254 g, 2.078 mmol) in dichloromethane (1.5 mL) and stirred at room temperature overnight. The solvent was removed under reduced pressure and the residue was purify by chromatography (0-100% ethyl acetate/hexanes) to give N-(3-chloro-1-(5-fluoropyridin-3-yl)-1H-pyrazol-4-yl)-N-ethyl-2-methyl-3-(methylthio)butanamide (34 mg, 0.092 mmol, 22.06%) as a faint yellow oil and (Z)—N-(3-chloro-1-(5-fluoropyridin-3-yl)-1H-pyrazol-4-yl)-N-ethyl-2-methylbut-2-enamide (38 mg, 0.118 mmol, 28.3% yield) as a yellow oil.

Provenance & Evidence