Gj. Clarkson et al., SYNTHESIS OF A PHTHALOCYANINE DERIVATIVE CONTAINING EASILY OXIDIZED STERICALLY-HINDERED PHENOLIC SUBSTITUENTS, Chemical communications, (20), 1997, pp. 1979-1980
A novel phthalocyanine containing four redox-active 3,5-di-tert-butyl-
4-hydroxyphenyl substituents is readily oxidised in aerated, basified
solution to give a complex product mixture; the oxidation is apparentl
y localised on the phenolic moieties without disturbing the structure
of the phthalocyanine core.