1-Bromo-3-chloropropane → 3-(3-chloropropyl)-7-(1,3-dimethyl-1H-pyrazol-5-yl)-2,3,4,5-tetrahydro-1H-3-benzazepine

Participants

Reaction Steps

To a solution of 7-(1,3-dimethyl-1H-pyrazol-5-yl)-2,3,4,5-tetrahydro-1H-3-benzazepine (0.5 g) in dry THF (10 ml), diisopropylethylamine (0.85 ml) and 1-bromo-3-chloropropane (0.47 mL) were added and the resulting mixture was refluxed for 7 hours. After cooling at room temperature it was diluted with ethyl acetate (30 ml) washed twice with a saturated solution of NaHCO3 in water (20 ml), dried over Na2SO4 and concentrated under reduced pressure. The crude was purified by biotage chromatography using a silica 25 M+ cartridge and eluting with cHex/EtOAc 8:2 to give the title compound as a colourless oil (0.57 g).

Provenance & Evidence