**4. Conclusions**

Lipophilic tyrosyl, homovanillyl and hydroxytyrosyl esters were prepared using a green and mild procedure. The products were obtained in good yields, solubilizing **1**, **2** or **3** in dimethyl carbonate, an eco-friendly solvent, and adding a little excess of the appropriate C2–C18 acyl chloride. The procedure was then applied to hydroxytyrosol-enriched extracts obtained by olive oil by-products to afford a panel of lipophilic fractions containing hydroxytyrosyl esters of different chain lengths to use for applications where the solubility in lipid media is required.

**Author Contributions:** Experimental design: R.B.; acquisition and analysis of data: I.C.; F.S.; M.C.; interpretation of data: M.C.; R.B.; paper drafting, editing and revision: R.B.

**Funding:** The authors gratefully acknowledge MIUR (Ministry for Education, University and Research) for financial support (Law 232/216, Department of Excellence).

**Conflicts of Interest:** The authors declare no conflict of interest.
