Terpenic olefin epoxidation using metals acetylacetonates as catalysts

Pd-mediated epoxidation of olefins

“…Interestingly, the supported catalyst, namely Pd/zeolithe HZ, has been recycled without loss of its activity. Under similar experimental conditions, the Pd(acac) 2 -catalyzed reaction of ␣-pinene with isobutyraldehyde/O 2 did not afford the corresponding epoxide [45]. (9) Seven years later, Gao and Angelici who, apparently, were not aware of above Bregeault's study, have reported the oxidation of various olefins using supported Pd catalysts and the isobutyraldehyde or benzaldehyde/O 2 association.…”

Biomimetic kinetics and mechanism of cyclohexene epoxidation catalyzed by metalloporphyrins

“…Although aerobic epoxidation of olefins with aldehyde catalyzed by transition metal complexes, especially metal-␤-diketonate complexes, have been well investigated [25][26][27], few reports were found for such aerobic epoxidation with metallporphyrins as catalyst [28][29]. In the previous studies, the simple structural metalloporphyins exhibited high catalytic performance for oxidation of alkanes, sulfides and alcohols by molecular oxygen [30][31][32][33].…”

Development of a selective, solvent-free epoxidation of limonene using hydrogen peroxide and a tungsten-based catalyst

“…1 Waste biomass-derived limonene, have many applications, especially in the fragrance, flavour and cosmetic industries. [2][3][4][5][6][7][8][9] Over recent decades, there has been many research into the use of limonene as a chemical feedstock, especially for limonene oxide, a monomer for bio-based polymers. 10,11 Limonene oxide has many possible uses in the polymer industry and has been investigated as a means of incorporating CO2 into the synthesis of polycarbonates.…”