Abstract
Aryl diacetic mono‐acid mono‐esters were designed and efficiently synthesized as mono‐protected bifunctional building blocks for the Perkin condensation between arylacetic acids and arylglyoxylic acids. Although, so far, this Perkin strategy has only been used for the formation of linear trimers or macrocyclic tetramers, it can now be adapted to the formation of pentameric conjugated species to give access, after adequate intramolecular cyclizations, to longer and more complex carboxy‐substituted polycyclic aromatic compounds.
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