Oxalyl chloride → HCID 71294318, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-cyclohexyl-6-(2,2,2-trifluoro-ethoxy)-nicotinic acid (Example 4b) (50 mg, 0.16 mmol) in dichloromethane (5 mL) was added oxalylchloride (0.02 mL, 0.25 mmol) at 0° C. and the reaction mixture was stirred at 25° C. for 3 h. Solvent was removed in vacuo and the residue was dissolved in dry dichloromethane. To this was added DIPEA (0.2 mL, 0.99 mmol) followed by 2-pyrazinamine (CAN 5049-61-6, 19 mg, 0.21 mmol) at 25° C. and the reaction mixture was stirred for 12 hours at that temperature. The solvent was removed in vacuo and the crude residue was purified by prep-HPLC to give 5-cyclohexyl-N-pyrazin-2-yl-6-(2,2,2-trifluoro-ethoxy)-nicotinamide as off white solid (10 mg, 15.9%); MS (ESI): 381.4 [M+H]+.

Provenance & Evidence