N-Iodosuccinimide → methyl 4-(4-iodo-1-methyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 4-(1-methyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate (700 mg, 3.15 mmol) in THF (5 mL) was added NIS (922 mg, 4.09 mmol) in one portion. The reaction mixture was stirred at 75° C. for 10 h, and then cooled to room temperature. The reaction mixture was concentrated and purified on silica gel (EtOAc/Hex 10-20%) to give the title compound (470 mg, 43%) as an off white solid: LC-MS (ES) m/z 350 (M+H)+.

Provenance & Evidence