The oxidative coupling polymerization of 2,3‐dihydroxynaphthalene with the novel dinuclear‐type copper(II) catalysts successfully produced poly(2,3‐dihydroxy‐1,4‐naphthylene). For example, the MeOH‐insoluble polymer with a number average molecular weight of 4.4 × 103 from the polymerization using the complex of CuCl2 and N,N′‐bis(2‐morpholinoethyl)‐p‐xylylenediamine (p‐1) at room temperature under an O2 atmosphere followed by acetylation of the hydroxyl groups was obtained in 63% yield. The structures of the tetraamine ligands and the counter anion of the copper(II) salts significantly influenced the catalyst activity. The polymerization of 2,2′‐dimethoxy‐1,1′‐binaphthalene‐3,3′‐diol with the 2CuCl2‐p‐1 catalyst, however, resulted in a lower yield. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 1635–1640, 2005

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The simple inclusion complex of bisphenol A (3) with quinoline (4) was obtained from the several solutions, and this method was useful for the recovery of 3 from the water solution.

The 1:1 inclusion complexes of phenol hosts, 4,4′-isopropylidenebisphenol, 4,4′-cyclohexylidenebisphenol, and 4-(1,1,3,3-tetramethylbutyl)phenol, with quinoline N-oxide were obtained in good yields. Single-crystal X-ray structural analyses revealed the molecular arrangement of the inclusion complexes.