Quaternized phthalocyanin derivatives

摘要

New phthalocyanin derivatives which can be used to differentiate basophils from other blood cells are disclosed. The compounds to which the present invention are quaternary salts of a substituted phthalocyanin structure wherein the substitutions are each independently hydrogen, sulfonate, or a C1-C7 hydrocarbon, optionally containing at least one heteroatom, with the proviso that at least one of them is <IMAGE> in which R1-R3 are each independently lower alkyls, cycloalkyls or olefins of which at least one is C2-C4 and two may join to form a ring; R4 is hydrogen or a C1-C3 alkyl; n is an integer from 1 to 6; M is a polyvalent metal ion. It is preferred that at least two and especially at least three substitutions have the structure so set forth.