A catalytic system that operates well for the epoxidation of alpha-pinene, a very challenging Substrate, at near-neutral pH and ambient temperature without organic solvent was developed. With hydrogen peroxide as a terminal oxidant, combination of Na2WO4, PhP(O)(OH)(2), and [Me(n-C8H17)(3)N]HSO4 successfully catalyzed the epoxidation of alpha-pinene to give a-pinene oxide in 95% selectivity at 91% conversion, while the previously published conditions that use NH2CH2P(O)(OH)(2) as a promoter provide no epoxide. The method is also well applicable to the epoxidation of the other acid-sensitive terpenes.
机构:
Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R ChinaChinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
Liu, Junhua
Wang, Fang
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Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R ChinaChinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
Wang, Fang
Sun, Kunpeng
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Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R ChinaChinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
Sun, Kunpeng
Xu, Xianlun
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Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R ChinaChinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
机构:
Univ York, Ctr Clean Technol, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Ctr Clean Technol, Dept Chem, York YO10 5DD, N Yorkshire, England
Grigoropoulou, Georgia
Clark, James H.
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Univ York, Ctr Clean Technol, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Ctr Clean Technol, Dept Chem, York YO10 5DD, N Yorkshire, England