Poly 5-Amino-1-Naphthol

Electrocatalytic reduction of chlorates was also studied on modified electrodes containing heteropolyanions entrapped in polypyrrole [178] or poly(5-amino-1-naphthol) [95]. 

Fig. 3.23 In situ resonant Raman spectra (A = 632.8 nm) of a poly (5-amino-1-naphthol) electrode prepared and cycled in 1 mol dm HCl at different potentials. (From [332], reproduced with the permission of Elsevier Ltd.)...

A variety of phenol couplings have been described. Those reported before 1991 have been reviewed [66]. 2-Naphthol (27) was oxidized to l,l -binaphthol (28) in high current efficiency on a graphite felt electrode coated with a thin poly(acrylic acid) layer immobilizing 4-amino-2,2, 6,6-tetramethylpiperidinyl-l-oxy (4-amino-TEMPO) (Scheme 10) [67]. 

In 1994, Osa and co-workers reported a very interesting means of obtaining chiral bi-naphthol based on electrocatalytic synthesis [139]. This work required the coating of the electrode with a poly(acrylic acid) (PAA) layer bonded via an amide connection to 4-amino-2,2,6,6-tetramethylpiperidin-l-yloxyl [91, 92]. (-)-Sparteine (208) was used as both the mediator and as a chiral agent (present in a stoichiometric amount) in the anolyte compartment. The yields and enantiomeric excesses obtained were excellent (Table 34). The complexity of... 

Synthesis oxidative electropolymerization from 5-amino-l-naphthol in acid media. In basic media, the polymerization proceeds through the oxidation of the —OH group and yields the poly(naphthalene oxide) structure [714],... 

Poly(ester-imide) was prepared in two steps. In the first step, 6FDA was reacted with 5-amino-l-naphthol to obtain diimide-dinaphthols. This underwent high temperature polycndensation reactions with aromatic and aliphatic diacid chlorides to produce poly(ester-imide) [143] (Figure 28). 

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