Background: In this overview, different heterogeneous catalysts based on acid, base, metal and enzymes have discussed for the synthesis of industrially relevant perfumes and flavor compound. These molecules mainly produced by a variety of reaction pathways such as esterification, isomerization, hydration, alkylation, hydrogenation, oxidation, etc. All these reactions have discussed thoroughly for the synthesis of vital aromatic notes. It also summarizes the various recent technologies applied for designing the new catalyst to obtain the maximum yield of desired product. Overall this review highlighted the green, clean and eco-friendly processes which can be industrially accepted for the synthesis of perfumes, flavors and fragrance.
Objective: The objective of the current review is to emphasize on the synthesis of industrially important perfume and flavor molecules such as α-terpineol, cyclohexyl esters, thymol, raspberry ketone, etc. using heterogeneous catalyst.
Results: Two-hundred and seventy four papers were reported in this review, the majority of which are on heterogeneous catalysis for synthesis of molecules which impart flavor or possesses perfumery characteristics. Among all, the preparation of esters is highlighted as they represent an imperative functional group in aroma chemicals.
Conclusion: The review confirms the need of heterogeneous catalysis in pollution-free and cost-effective synthesis of flavor and perfumery compounds.