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A Synthesis of 3-Phenyl-1,2,3,4-Tetrahydroisoquinoline and 2-Phenyl-1,2,4,5-Tetrahydro-3h-3-Benzazepine via Pummerer-Type Cyclization: Enhancing Effect of Boron Trifluoride Diethyl Etherate on the Cyclization.