(R)-2-(6-Methoxynaphthalen-2-yl)propanoic acid is the R-enantiomer of naproxen, a nonsteroidal anti-inflammatory drug (NSAID). Although the S-enantiomer possesses the primary pharmacological activity as a pain reliever and anti-inflammatory agent, the R-enantiomer serves as a crucial intermediate in the industrial production of enantiomerically pure (S)-naproxen. It is employed in racemization-resolution processes to recycle the undesired enantiomer, thereby enhancing overall yield and efficiency in pharmaceutical manufacturing. Its chiral nature is essential for stereoselective synthesis and purification techniques. Additionally, it is used in research for enantiomer-specific studies, chiral auxiliary development, and synthesis of novel analgesics.