Methods for the synthesis of mono-, di-, and tetra-glycosylated phthalonitriles are described, which are key building blocks for
the preparation of the corresponding glycosylated metal (mostly zinc) phthalocyanines. Than the preparation of symmetrically and unsymmetrically
tetra- and octa-glycosylated zinc phthalocyanines in which the carbohydrate is attached either anomerically or via another
one of its OH-groups to the phthalocyanine macrocycle is assessed.