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Cr(Ⅵ)-헤테로고리 착물에 의한 알코올류의 선택적 산화반응
최선도,박영조 三陟大學校 産業科學技術硏究所 2004 産業科學技術硏究論文集 Vol.9 No.1
Pyrazinium chlorochromate[C₄H₄N₂HCrO₃Cl]and isoquinolinium dichromate[(C_(9)H_(7)NH)₂Cr₂O_(7)] were synthesized, which were used to oxidize benzylic alcohol, allylic alcohol, primary alcohol and secondary alcohols in DMF to give aldehyde of each compound. Their structures were verified by IR, EA and ICP. The oxidation of alcohols was examined by isoquinolinium dichromate and pyrazinium chlorochromate in DMF. As a result, isoquinolinium dichromate and pyrazinium chlorochromate were found as efficicent oxidizing agents that converted benzylic alcohol, allylic alcohol, primary alcohol and secondary alcohols to the corresponding aldehydes or ketones. The selective oxidation of alcohols was also examined by isoquinolinium dichromate and pyrazinium chlorochromate in DMF. isoquinolinium dichromate and pyrazinium chlorochromate were selective oxidizing agents of benzylic alcohol, allylic alcohol and primary alcohol in the presence of secondary alcohols.
최선도 三陟大學校 1995 論文集 Vol.28 No.1
Gautreaux derived for obtaining activity coeff. at dilute solution in binary system. By correlating this equation to the x-t retation, a new simplifed equation was derived and conveniency and usefulness. Use of the equation was illustrated.
Dipyrazinium Trichromate에 의한 알코올류의 산화반응에 대한 메카니즘 연구
최선도,박영조 三陟大學校 産業科學技術硏究所 2004 産業科學技術硏究論文集 Vol.9 No.1
Dipyrazinium trichromate[(C₄H₄N₂H)₂Cr₃O_(10)) was synthesized by the reaction of pyrazine with chromium(Ⅵ) trioxide in 6M HC1. dipyrazinium trichromate structure was verified by IR, EA and ICP. The oxidation of benzyl alcohol by dipyrazinium trichromate in various solvents showed that the reactivity increased with the increase of the dielectric constant's order: cyclohexen < chloroform < acetone < acetonitrile. In the presence of acid, dipyrazinium trichromate oxidized the substituted benzyl alcohols in N,N-dimethylformamide. The Hammett reaction constant ρ was -0.69 at 303K. The observed experimental data was used to rationalize the hydride ion transfer in the rate-determining step.
2-Methylpyrazinium Chlorochromate를 이용한 치환 벤질알코올류의 산화반응 속도
최선도,박영조 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.1
2-Methylpyrazinium chlorochromate(2-MPC) was synthesized by the reaction of 2-methylpyrazine with chromium(Ⅵ) trioxide in 6M HCI. 2-MPC structure was verified by IR. EA and ICP. The oxidation of benzyl alcohol using 2-MPC in various solvents showed that the reactivity increased with the increase of the dielectric constant's order: cyclohexen < chloroform < acetone < acetonitrile. In the presence of acid. 2-MPC oxidized the substituted benzyl alcohols in N,N-dimethylformamide. The Hammett reaction constant p was -0.68 at 303K. The observed experimental data was used to rationalize the hydride ion transfer in the rate-determining step
Dipyrazinium Trichromate를 이용한 알코올류의 선택적 산화반응과 그 성질에 관한 연구
최선도,박영조 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.1
Dipyrazinium Trichromate[(C₄H₄N₂Cr₃O_(10)] was synthesized by the reaction of pyrazine with chromium(Ⅵ) trioxide in 6N HCI. Dipyrazinium Trichromate structure was verified by IR, EA and ICP. The oxidation of benzyl alcohol using Dipyrazinium Trichromate in various solvents showed that the reactivity increased with the increase of the dielectric constant such as cyclohexen < chloroform < acetone < acetonitrile. The oxidation of alcohols was examined by Dipyrazinium Trichromate in DMF. As a result, Dipyrazinium Trichromate was found as efficicent oxidizing agent that converted benzylic alcohol. allylic alcohol. primary alcohol and secondary alcohols to the correspondmg aldehydes or ketones. The selective oxidation of alcohols was also examined by Dipyrazinium Trichromate in DYF. Dipyrazinium Trichromate was selective oxidizing agent of benzylic alcohol, allylic alcohol and primary alcohol in the presence of secondary alcohols.
Isoquinolinium Dichromate에 의한 Alcohol류의 산화반응 속도론과 메카니즘
최선도,박영조,이은주 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.2
Isoquinolinium dichromate[(C_(9)H_(7)NH)₂Cr₂O_(7)] was synthesized by the reaction of isoquinoline with chromium(VI) trioxide in water. isoquinolinium dichromate[(C_(9)H_(7)NH)₂Cr₂O_(7)] structure was verified by IR. EA and ICP. The oxidation of benzyl alcohol by isoquinolinium dichromate[(C_(9)H_(7)NH)₂Cr₂O_(7)] in carious solvents showed that the reactivity increased with the increase of the dielectric constant s order: cyclohexen < chloroform < acetone < acetonitrile. In the presence of acid, isoquinolinium dichromate [(C_(9)H_(7)NH)₂Cr₂O_(7)] oxidized the substituted benzyl alcohols in N,N-dimethylformamide. The Hammett reaction constant p was -0.69 at 303K. The observed experimental data was used to rationalize the hydride ion transfer in the rate-determining step.