HCID 86723802, compound → 7-bromo-6-methyl-3,4-dihydro-1,4-benzoxazepin-5(2H)-one

Participants

Reaction Steps

A mixture of 7-bromo-4-(4-methoxybenzyl)-6-methyl-3,4-dihydro-1,4-benzoxazepin-5(2H)-one (130c, 2.8 g, 7.4 mmol) in TFA (30 mL) was refluxed for 14 hours. The reaction mixture was concentrated under vacuum. The residue was purified by column chromatography (petroleum ether/EtOAc, 3/1) to give 7-bromo-6-methyl-3,4-dihydro-1,4-benzoxazepin-5(2H)-one (7-bromo-6-methyl-3,4-dihydro-1,4-benzoxazepin-5(2H)-one (130d, 1.2 g, 63%) as a brown solid.

Provenance & Evidence