Synthesis of Apogalanthamine Analogues as [alpha]-Adrenergic Blocking Agents. XIII. Syntheses of Phenolic 8-Hydroxy-5, 6, 7, 8-tetrahydrodibenz[c, e]azocines

10, 11-Diphenolic 8-hydroxy-5, 6, 7, 8-tetrahydrodibenz[c, e]azocine 3, having a partial structure of adrenaline, was prepared by demethylation of the dimethoxyazocine 12 with boron tribromide. The related monophenolic 8-hydroxyazocines 4 and 5 were prepared by cyclization of the dihalogeno-β-phenylethanolamines 6c and 7c with zerovalent nickel, followed by hydrolysis and debenzylation of the O-protected dibenz[c, e]azocines 13 and 14, respectively.