Acylation of the 2-aminobenzophenone (I) with bromoacetyl bromide (II) provides the bromoacetamide (III). Subsequent treatment of (III) with ammonia leads to the benzodiazepinone (IV). Methylation of the lactam N with iodomethane in the presence of K2CO3 gives rise to (V). The potassium enolate of benzodiazepinone (V) is then alkylated by 2-(bromomethyl)naphthalene (VI) to furnish the naphthylmethyl derivative (VII). Finally, methyl ether cleavage using AlBr3 in ethanethiol provides the target phenolic compound