Abstract
Treatment of tetrahydrofuran (THF) solutions of the title compounds with excess lithium (or potassium) metal under ultrasonic irradiation in the presence of catalytic amounts of the electron-transfer agent 4,4′-di- t-butylbiphenyl (DBB) caused conversions to aromatic hydrocarbons in good yields. Addition of 1 or 2 equiv of alkyl halides prior to aq ammonium chloride treatment during workup provided mono- or di-alkylated products.
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