THIOPHENE-3,4-DICARBOXYLIC ACID

Thiophene-3,4-dicarboxylic acid (CAS 4282-29-5) is a strategically substituted heteroaromatic dicarboxylic acid building block for applications in organic electronics, coordination chemistry, and medicinal chemistry. This molecule integrates a thiophene core—a sulfur-containing five-membered heterocycle with excellent electron-donating properties and π-conjugation potential—with carboxylic acid substituents at the C3 and C4 positions. The 3,4-dicarboxylation pattern enables versatile derivatization: both acid groups can be independently converted to esters, amides, or anhydrides for polymer or materials synthesis, while the thiophene ring provides a planar, electron-rich platform suitable for charge transport in organic semiconductors. This intermediate is particularly valuable for constructing conductive polymers, metal-organic frameworks (MOFs), and bioactive molecules where the 3,4-thiophene geometry offers distinct conformational constraints compared to the more common 2,5-isomer. Manufactured with purity ≥97-98% under controlled conditions, it supports materials science programs targeting organic photovoltaics, organic field-effect transistors (OFETs), and drug discovery initiatives requiring sulfur-containing heterocyclic scaffolds.