Nonsymmetric Pyrene-Fused Pyrazaacenes via Green Oxidation of 2,7-Di- tert-butylpyrene

J Org Chem. 2024 Feb 2;89(3):1989-1992. doi: 10.1021/acs.joc.3c01796. Epub 2024 Jan 17.

Abstract

We disclose a four-step oxidize-condense-oxidize-condense synthesis pathway to prepare nonsymmetric pyrene-fused pyrazaacenes (PPAs) using our recently discovered oxidation conditions for 2,7-di-tert-butylpyrene. The new pathway results in marked improvements in yields and simplifies purification as compared with the sequential condensation strategy previously employed to make these compounds.