Multi-gram synthesis of a porphyrazine platform for cellular translocation, conjugation to Doxorubicin, and cellular uptake

We report the synthesis of the near infrared (NIR) fluorescent porphyrazine (Pz) 285, with pendant hydroxyl groups, as a non-toxic platform for delivery of conjugated chemotherapeutic agents to tumor cells. Conjugation of Pz 285 to Doxorubicin via an acid labile linker and initial biological studies are reported.