Chlorosuccinimide → methyl 4-(4-chloro-1-ethyl-1H-pyrazol-5-yl)-2-furancarboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 4-(1-ethyl-1H-pyrazol-5-yl)-2-furancarboxylate (300 mg, 1.36 mmol) and NCS (218 mg, 1.63 mmol) in THF (5 mL) was heated to 70° C. in a sealed tube. After 5 h, the reaction mixture was concentrated and purified via column chromatography (silica, 10-20% EtOAc/Hexane) affording the title compound (260 mg, 75%) as a white solid: LC-MS (ES) m/z 255 (M+H)+.

Provenance & Evidence