Methyl 3,4-dihydro-1H-isochromene-3-carboxylate

Methyl 3,4-dihydro-1H-isochromene-3-carboxylate (CAS 219874-06-3) is a high-purity chiral isochroman ester engineered for CNS drug discovery, kinase inhibitor development, and GPCR modulator synthesis. As the methyl ester analog of 3,4-dihydro-1H-2-benzopyran-3-carboxylic acid, this molecule integrates a rigid benzene-fused oxygen heterocycle (isochroman) with a versatile ester handle at the C3 chiral center. The fused bicyclic architecture provides a planar aromatic domain for π-stacking interactions alongside a flexible saturated pyran ring for conformational tuning, while the C3-methyl ester moiety enables enhanced lipophilicity, direct transesterification, or controlled hydrolysis to the free acid. This intermediate is particularly valuable for constructing CNS-penetrant scaffolds, kinase inhibitor cores, and GPCR modulators where the isochroman-ester motif optimizes target engagement through defined stereochemistry and metabolic stability. Manufactured with purity ≥95-98% under controlled conditions, it supports drug discovery programs requiring modular access to chiral oxygen heterocycles with tunable physicochemical properties.