• Bulletin of the Korean Chemical Society
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• 제23권7호
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• pp.1039-1041
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• 2002

• Bulletin of the Korean Chemical Society
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• 제22권6호
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• pp.547-548
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• 2001

• Archives of Pharmacal Research
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• 제5권2호
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• pp.109-110
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• 1982

Conveersion of vinylogous glycidic ester 1 to 2 by a stereoselective acyclic allylic epoxidation will be presented.

• Archives of Pharmacal Research
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• 제5권2호
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• pp.107-108
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• 1982

Some examples of stereoselective epoxidation of acyclic allylic and homoallylic systems will be presented.

• Bulletin of the Korean Chemical Society
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• 제27권10호
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• pp.1674-1676
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• 2006

• Bulletin of the Korean Chemical Society
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• 제25권11호
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• pp.1695-1698
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• 2004

• Bulletin of the Korean Chemical Society
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• 제35권6호
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• pp.1675-1680
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• 2014

A peroxopolyoxotungsten-based ionic hybrid was synthesized by anion-change of peroxopolyoxometalate (POM) $PW_4O{_{24}}^{3-}$ with dicationic long-chain alkyl imidazolium ionic liquids. The characterization was conducted by FT-IR, TGA, $^1H$-NMR and CHN Elemental analyses. Its catalytic performance was evaluated by the epoxidation of soybean oil with $H_2O_2$ under solvent-free condition, including testing of organic cations influence, catalytic reusability and reaction conditions. The catalyst was proved to be a highly efficient recyclable catalyst for epoxidation of various vegetable oils with $H_2O_2$, showing high $H_2O_2$ utilization efficiency, high catalytic activity, convenient recovery and good reuse ability.

• BMB Reports
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• 제45권12호
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• pp.736-741
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• 2012

Certain members of the cytochromes P450 superfamily metabolize polyunsaturated long-chain fatty acids to several classes of oxygenated metabolites. An approach based on in silico analysis predicted that Streptomyces peucetius CYP107N3 might be a fatty acid-metabolizing enzyme, showing high homology with epoxidase enzymes. Homology modeling and docking studies of CYP107N3 showed that oleic acid can fit directly into the active site pocket of the double bond of oleic acid within optimum distance of $4.6{\AA}$ from the Fe. In order to confirm the epoxidation activity proposed by in silico analysis, a gene coding CYP107N3 was expressed in Escherichia coli. The purified CYP107N3 was shown to catalyze $C_9-C_{10}$ epoxidation of oleic acid in vitro to 9,10-epoxy stearic acid confirmed by ESI-MS, HPLC-MS and GC-MS spectral analysis.

• 공업화학
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• 제23권6호
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• pp.614-617
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• 2012

티타늄을 함유하는 제올라이트 촉매를 이용한 디시클로펜타디엔(DCPD)의 선택적 에폭시화 반응에 관한 연구를 수행하였다. 티타늄을 함유하는 제올라이트 계 촉매 중에 Ti-제올라이트 Y촉매가 에폭시화 반응에서 가장 좋은 활성을 보였다. 선정된 Ti-제올라이트 Y촉매를 이용하여 DCPD 에폭시화 반응에 미치는 과산화수소/DCPD의 비, 반응온도, 반응시간, 산처리 영향, 촉매의 양에 관한 여러 변수들의 영향이 연구되어 반응조건들이 DCPD 에폭시 반응에 미치는 영향에 관해 연구하였다. 또한 촉매 제조 방법에 따른 촉매에 존재하는 Ti 구조에 대해 IR과 UV-vis 기기를 이용하여 분석하였다.

• 한국세라믹학회지
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• 제49권5호
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• pp.423-426
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• 2012

$Al_2O_3$/NiO powder was obtained through hydrolysis-condensation reactions and thermal treatments. An organic additive, triblock copolymer surfactant P123, was added to the starting materials to control the surface area and morphology. The synthesized powder was characterized by X-ray diffractometry (XRD), field-emission scanning electron microscopy (FE-SEM) and a Brunner-Emmett-Teller surface analysis (BET). The heterogeneous catalytic activity of this powder was applied to an epoxidation reaction of styrene and was monitored using a gas chromatograph with mass spectrophotometry (GC/MS).