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

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 5-chloro-4-(1-ethyl-1H-pyrazol-5-yl)-2-furancarboxylate (800 mg, 3.14 mmol) and NCS (600 mg, 4.49 mmol) in THF (5 mL) was heated to 70° C. in a sealed tube. After 2 h, the reaction mixture was concentrated and purified via column chromatography (silica, 10-20% EtOAc/Hexane) affording the title compound (710 mg, 78%) as a white solid: LC-MS (ES) m/z 289 (M+H)+.

Provenance & Evidence