Sodium hydride → 6'-bromo-5,7,8,9-tetrahydrospiro[benzo[7]annulene-6,2'-inden]-1'(3'H)-one

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Reaction Steps

A mixture of 6-bromo-2,3-dihydro-1H-inden-1-one (1.2 g, 5.71 mmol) and 1-(bromomethyl)-2-(3-bromopropyl)benzene (1.66 g, 5.71 mmol) in THF (40 mL) was added NaH (457 mg, 60%, 11.42 mmol) at room temperature. The mixture was refluxes for 2 h. The mixture was quenched with water and extracted with EtOAc. The organic layer was dried and concentrated to give the residue, which was purified by column chromatography to give 6′-bromo-5,7,8,9-tetrahydrospiro[benzo[7]annulene-6,2′-inden]-1′(3′H)-one (420 mg, 22%).

Provenance & Evidence