Ethyl isocyanate → (3S)-3-{[4-(4-bromo-2-fluorophenyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-3-yl]methyl}-N-ethyl-1-pyrrolidinecarboxamide

Participants

Reaction Steps

Into a 4 mL vial was placed 4-(4-bromo-2-fluorophenyl)-5-[(3S)-3-pyrrolidinylmethyl]-2,4-dihydro-3H-1,2,4-triazol-3-one hydrochloride (0.212 mmol) and tetrahydrofuran (2 mL). In succession was added triethylamine (0.717 mmol) and ethyl isocyanate (0.253 mmol). The vial was capped and the solution stirred at room temperature for 1 h. The solution was poured into a 10 mL solution of 1:1 dichloromethane:water. The solution was shaken and allowed to settle. The organic layer was separated, dried over sodium sulfate, filtered, and concentrated in vacuo. No further purification was performed on the title compound (74 mg, 68%). MS(ES)+ m/e 412.2, 414.1 [M+H]′.

Provenance & Evidence