3-(4-Bromophenyl)propionic acid → 1-Indanone, 6-bromo-

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A mixture of 3-(4-bromophenyl)propanoic acid (26 g, 12 mmol) in SOCl2 (50 mL) was refluxed overnight, the mixture was concentrated, then added to AlCl3 (80 g, 61 mmol) in DCM (100 mL), the mixture was stirred at room temperature overnight. The mixture was quenched with HCl aqueous, extracted with DCM, washed with brine, dried over Na2SO4, concentrated to give 6-bromo-indan-1-one (12 g, 48%). 1H-NMR (CD3OD): 2.65 (m, 2H), 3.06 (m, 2H), 7.31 (m, 1H), 7.62 (m, 1H), 7.80 (m, 1H).

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