Used in the Wittig reaction to synthesize alkenes from carbonyl compounds, particularly in organic synthesis requiring control over the position of double bonds. This compound serves as a precursor to a stable ylide (carbanion equivalent), facilitating the conversion of carbonyl compounds such as aldehydes or ketones into alkenes with specific structures. The tetrahydro-2H-pyran-4-yl group enhances compatibility with polar solvents, and it is commonly applied in the synthesis of bioactive or pharmaceutical compounds that require precise alkene architectures.