Cyclopentyl methanesulfonate is primarily used as an alkylating agent in organic synthesis. It is often employed in the preparation of various pharmaceutical intermediates due to its ability to transfer the cyclopentyl group to nucleophiles. This chemical is particularly useful in the synthesis of complex molecules where the introduction of a cyclopentyl moiety is required. Additionally, it finds application in the development of agrochemicals and fine chemicals, where its reactivity and selectivity are advantageous. Its role in modifying molecular structures makes it a valuable tool in medicinal chemistry for creating potential drug candidates with improved efficacy and pharmacokinetic properties.