Sodium Bicarbonate → HCID 58026093, compound

Participants

Reaction Steps

A reaction mixture containing 2-bromo-1-(3,5-difluoro-4-methoxyphenyl)ethanone (2.0 g, 7.5 mmol, 1.0 equiv) and thiourea (0.57 g, 7.5 mmol, 1.0 equiv) in EtOH (20.0 mL) was heated at reflux for 3.0 h. The residue was basified with saturated aqueous NaHCO3 (20 mL) and extracted with EtOAc (3×30 mL). The organic layer was separated, dried over MgSO4(s), and concentrated under reduced pressure. The resultant solids were washed with hexanes to give 4-(3,5-difluoro-4-methoxyphenyl)thiazol-2-amine (1.54 g, 6.4 mmol) as white solids in 84% yield: 1H NMR (DMSO-d6, 500 MHz) δ 7.49-7.54 (m, 2H), 7.12-7.14 (m, 3H), 3.92 (s, 3H); ESI-MS: m/z 243.0 (M+H)+.

Provenance & Evidence