Phosphorus oxychloride → 2-Bromo-4-chlorothieno(3,2-c)pyridine

Participants

Reaction Conditions

Reaction Steps

Phosphorus oxychloride (4.08 g, 26.6 mmol) was added dropwise to 2-bromothieno[3,2-c]pyridin-4 (5H)-one (2.04 g, 8.87 mmol) at 0° C. The mixture was heated at 135° C. for 2.5 h, then carefully poured over ice water. The precipitated was collected by filtration and dried to yield 1.78 g (80.7%) of title product. 1H NMR (270 MHz, CH3OH-d4) δ ppm 7.67 (d, 1H) 7.88 (dddd, J=6.33 Hz, 2H) 8.19 (d, J=5.54 Hz, 1H); MS 248.0 (M−H)+; Purity (HPLC) 100

Provenance & Evidence