Cyclotrimerization of 4,5-bis(hexylthio)phthalodinitrile (1) in 1-chlo
ronaphthalene in the presence of BCl3 leads to the subphthalocyanine 4
. Unsymmetrical phthalocyanines (5, 6) with six alkylthio substituents
on three of the benzenoid units are synthesized by the reaction of 4
with an diminoisoindoline derivative (R' = H or NO2). These extremely
soluble compounds are characterized by IR, H-1- and C-13-NMR as well a
s UV/Vis spectra.