Diazabicyclo[5.4.0]undec-7-ene → HCID 11253149, compound

Participants

Reaction Steps

In a 50 ml three necked flask fitted with a magnetic stirrer, under inert atmosphere, 4-(2-bromo-2,2-difluoro-ethyl)-1-(1H-imidazol-1-ylmethyl)-pyrrolidin-2-one 17 (0.16 g, 0.52 mmol) and diazabicyclo [5.4.0]undec-7-ene (0.1 ml, 0.62 mmol) in CHCl3 (0.5 ml) are stirred overnight at room temperature. The reaction mixture is filtered, evaporated in vacuo, diluted with CH2Cl2 and the organic layer is washed with water, dried over MgSO4, filtered and evaporated in vacuo. The residue is purified by chromatography on silicagel (CH2Cl2/EtOH/NH4OH: 93.5/06/0.5 (v/v/v)) to afford 4-(2,2-difluorovinyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one 18 (0.092 g, 80%) which is crystallized as a maleic salt in THF.

Provenance & Evidence