Used primarily as an alkylating agent in organic synthesis, enabling the introduction of the 3,3-dimethylallyl (prenyl) group into molecules. It is valuable in the preparation of fragrances, pharmaceuticals, and natural products where prenylation enhances biological activity or volatility. Commonly employed in the synthesis of terpenes and other isoprenoid compounds due to its structural similarity to isoprene units. Also utilized in the modification of nucleosides and alkaloids in medicinal chemistry research.