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3,4-Dihydroisoquinoline carboxylate 1 undergoes a smooth annulation with ω-bromopropionate, butyrate or ortho-bromomethyl benzoate 2 to afford the isoquinoline heterocycle 3 upon treatment with potassium tert-butoxide in DMF at −60°C. This novel annulation constitutes a formal direct synthesis of cyclic Reissert equivalent compounds, thus offers an expedient access towards certain medicinally important...
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