Phosgene → HCID 11277839, compound

Participants

Reaction Steps

In a 100 ml three necked flask fitted with a magnetic stirrer, under inert atmosphere, phosgene (20 wt % in toluene, 0.95 eq, 2.02 mmol, 1 g) was added dropwise at room temperature to a solution of 2-nitroimidazole (2.5 eq, 5.1 mmol, 0.577 g) and triethylamine (3 eq, 6.1 mmol, 0.628 g, 0.85 ml) in THF (30 ml). After 0.5 h, 1-hydroxymethyl-4-(3,4,5-trifluoro-phenyl)-pyrrolidin-2-one a23 (1 eq, 2.1 mmol, 0.5 g) in THF (5 ml) was added dropwise at room temperature. After 4 h, the crude mixture was pored into a mixture of ice-cooled saturated sodium carbonate. After extraction (AcOEt), drying of the cumulated organic layers (MgSO4), filtration and evaporation of the solvents, the crude mixture was purified by flash chromatography on silicagel (dichloromethane/methanol: 98/2 (v/v)) to give, after recrystallization in AcOEt, 1-(2-nitro-imidazol-1-ylmethyl)-4-(3,4,5-trifluoro-phenyl)-pyrrolidin-2-one 40 (138 mg, 20.3%).

Provenance & Evidence