Propyl mercaptan → HCID 59516103, compound

Participants

Reaction Conditions

Reaction Steps

tert-butyl 5-chloro-1-[4-(methoxycarbonylmethyl)phenyl]pyrazole-4-carboxylate (Intermediate#37) (767 mg, 2.19 mmol) was dissolved in butyronitrile (10 mL). Potassium carbonate (906 mg, 6.57 mmol) and propanethiol (284 μL, 2.74 mmol) were added and the mixture heated at 90° C. for 18 h. The reaction mixture was cooled to ambient and ethyl acetate (50 mL) was added. The mixture was washed with water (4×25 mL), dried (MgSO4) and evaporated under reduced pressure. The residue was purified by flash chromatography on silica gel (elution gradient 0-25% EtOAc in isohexane) to afford tert-butyl 1-[4-(methoxycarbonylmethyl)phenyl]-5-propylsulfanyl-pyrazole-4-carboxylate as a yellow oil. (527 mg, 62%).

Provenance & Evidence