1,2-Dibromoethane → HCID 68712528, compound

Participants

Reaction Conditions

Reaction Steps

A solution of lithium diisopropylamide in THF (2 M, 5.05 ml) was cooled to −55° C. and treated with (RS)-4-(2,4-difluoro-phenyl)-4,5-dihydro-oxazol-2-ylamine (667 mg, example 7) in THF (6 ml). The reaction mixture was stirred at −55° C. for 2 hrs, then treated dropwise with 1,2-dibromoethane (0.58 ml). The reaction mixture was warmed to r.t., then stirred overnight at r.t. It was quenched with H2O and extracted with EtOAc. The organic layer was dried over MgSO4, filtrated and concentrated. The crude product was purified by column chromatography (SiO2; gradient: CH2Cl2->CH2Cl2/MeOH 95:5) to give (RS)-4-(3-bromo-2,4-difluoro-phenyl)-4,5-dihydro-oxazol-2-ylamine (61 mg) as light yellow solid.

Provenance & Evidence