Chemoselective Synthesis of Aryloxy-Substituted Phthalocyanines

J Org Chem. 2019 Nov 1;84(21):14306-14312. doi: 10.1021/acs.joc.9b02126. Epub 2019 Oct 23.

Abstract

The synthesis of the first examples of 8-fold α-aryloxy-substituted phthalocyanines is described. 3,6-Diiodophthalonitrile was used as a precursor for a series of 3,6-aryloxy-substituted phthalonitriles, and a lead-mediated macrocyclization was employed to afford the corresponding free-base phthalocyanine complexes. The optical, electrochemical, and aggregation properties of these complexes can be tuned by varying the substituents on the aryloxy groups or by changing the pH value.