New and Efficient Synthesis of Oligomeric PorphyrinsviaStepwise Nucleophilic Substitution of Aminoporphyrins to Cyanuric Chloride

Abstract Porphyrin oligomers (Pn, n = 2, 3, 4, 5) were prepared by the nucleophilic substitution of amino porphyrin monomers to cyanuric chloride. In this method, two different porphyrins can be joined stepwise to 1,3,5-triazine ring in one-pot by choosing appropriate reaction temperatures. The reaction proceeded under relatively mild conditions (K2CO3 as a base, 61 °C) and in good yields (ca. 80%).