respectively. A gram-scale synthesis and further derivatizations are also reported. The ester group is easily removed via Happer’s decarboxylation. Sulfocoumarins are key structural motifs in several bioactive molecules. Herein, we describe a simple, one-pot procedure for the synthesis of structurally diverse sulfonocoumarin-3-carboxylates by heating 2-hydroxyaryl aldehydes with an active sulfonyl chloride