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폴리에틸렌글리콜 상이동 촉매상에서 니트로벤젠과 Fe(Co)5 로부터의 아닐린 합성
오소영,천승우,박대원,박상욱,신정호 ( So Young Oh,Sung Woo Chun,Dae Won Park,Sand Wook Park,Jung Ho Shin ) 한국공업화학회 1992 공업화학 Vol.3 No.4
Ironpentacarbonyl에 의한 니트로벤젠의 환원반응에 PEG를 상이동 촉매로 사용한 결과 상온에서 90% 이상의 아닐린 수율을 얻을 수 있었다. 니트로벤젠의 반응속도는 PEG의 사슬길이와 결합점의 수에 의존하였으며 NaOH의 농도가 높고 용매의 극성이 커질수록 증가하였다. 그러나 아닐린의 수율은 NaOH농도가 2N일때 최대였으며 그 이상의 농도에서는 감소하였다. PEG phase transfer catalyzed reduction of nitrobenzene with Fe(CO)_5 afforded aniline up to over 90% yield at room temperature. The reaction rate of nitrobenzene was dependent on the chain length and number of binding sites of PEG, and it was increased with the concentration of NaOH and solvent polarity. But the yield of aniline was maximum with 2N NaOH solution and it was decreased at higher concentrations.
폴리에틸렌글리콜 상이동 촉매상에서 니트로벤젠과 Fe(CO)<sub>5</sub>로부터의 아닐린 합성
오소영,천승우,박대원,박상욱,신정호,Oh, So-Young,Chun, Sung-Woo,Park, Dae-Won,Park, Sang-Wook,Shin, Jung-Ho 한국공업화학회 1992 공업화학 Vol.3 No.4
Ironpentacarbonyl에 의한 니트로벤젠의 환원반응에 PEG를 상이동 촉매로 사용한 결과 상온에서 90% 이상의 아닐린 수율을 얻을 수 있었다. 니트로벤젠의 반응속도는 PEG의 사슬길이와 결합점의 수에 의존하였으며 NaOH의 농도가 높고 용매의 극성이 커질수록 증가하였다. 그러나 아닐린의 수율은 NaOH농도가 2N일때 최대였으며 그 이상의 농도에서는 감소하였다 PEG phase transfer catalyzed reduction of nitrobenzene with $Fe(CO)_5$ afforded aniline up to over 50% yield al room temperature. The reaction rate of nitrobenzene was dependent on the chain length and number of binding sites of PEG, and it was increased with the concentration of NaOH and solvent polarity. But the yield of aniline was maximum) with 2N NaOH solution and it was decreased at higher concentrations.
상 이동 촉매상에서 니트로벤젠과 Fe<sub>3</sub>(CO)<sub>12</sub>로부터 아닐린의 합성
천승우,오소영,박대원,박상욱,신정호,Chun, Sung-Woo,Oh, So-Young,Park, Dae-Won,Park, Sang-Wook,Shin, Jung-Ho 한국공업화학회 1992 공업화학 Vol.3 No.2
Triirondodecacarbonyl에 의한 니트로벤젠의 환원 반응에 상 이동 촉매를 사용한 결과 상온에서 높은 수율의 아닐린을 합성할 수 있었다. Benzyltriethylammonium chloride, tricaprylmethylammonium chloride, 18-crown-6, polyethyleneglycol-400 등이 이 반응에 좋은 상 이동 촉매임을 알 수 있었고, 반응온도, 수용액상의 NaOH 농도, 유기용매가 반응속도 및 아닐린의 수율에 미치는 영향을 고찰하였다. The reduction of nitrobenzene by triirondodecacarbonyl over phase transfer catalysts was investigated. The phase transfer catalysts showed a good yield of aniline at room temperature. Benzyltriethylammonium chloride, tricaprylmethyl ammonium chloride, 18-crown-6 and polyethyleneglycol-400 were good phase transfer catalysts in this reaction. The effect of reaction temperature, concentration of sodium hydroxide and organic solvents on the reaction rate and yield of aniline were studied in this work.
상 이동 촉매상에서 니트로벤젠과 Fe3(Co)12 로부터 아닐린의 합성
천승우,오소영,박대원,박상욱,신정호 ( Sung Woo Chun,So Young Oh,Dae Won Park,Sang Wook Park,Jung Ho Shin ) 한국공업화학회 1992 공업화학 Vol.3 No.2
Triirondodecacarbonyl에 의한 니트로벤젠의 환원 반응에 상 이동 촉매를 사용한 결과 상온에서 높은 수율의 아닐린을 합성할 수 있었다. Benzyltriethylammonium chloride, tricaprylmethylammonium chloride, 18-crown-6, polyethyleneglycol-400 등이 이 반응에 좋은 상 이동 촉매임을 알 수 있었고, 반응온도, 수용액상의 NaOH 농도, 유기용매가 반응속도 및 아닐린의 수율에 미치는 영향을 고찰하였다. The reduction of nitrobenzene by triirondodecacarbonyl over phase transfer catalysts was investigated. The phase transfer catalysts showed a good yield of aniline at room temperature. Benzyltriethylammonium chloride, tricaprylmethyl ammonium chloride, 18-crown-6 and polyethyleneglycol-400 were good phase transfer catalysts in this reaction. The effeet of reaction temperature, concentration of sodium hydroxide and organic solvents on the reaction rate and yield of aniline were studied in this work.
손수민(Soo Min Shon),송치욱(Chi Wook Song),구자설(Ja Soul Koo),정록선(Rok Son Choung),신정호(Jeong Ho Shin),김윤배(Yun Bae Kim),전훈재(Hoon Jai Chun),이상우(Sang Woo Lee),최재현(Jai Hyun Choi),김창덕(Chang Duck Kim),류호상(Ho Sang Ry 대한소화기기능성질환·운동학회 2001 Journal of Neurogastroenterology and Motility (JNM Vol.7 No.2
N/A Aims: Gastroesophageal reflux disease (GERD) is known to be one of the contributing factors to cause epigastric soreness, which we often experience after intake of flour-based meals. The aim of this study was to evaluate gastroesophgeal reflux (GER) and its mechanism according to intake of different ingredients of meals. Methods: We investigated the effect of meals of different ingredients on the lower esophageal sphincter (LES) pressure, the frequency of transient LES relaxation (Tlesr) and GER in seven healthy volunteers. The meals used in this study were either rice cakes or flour cakes, which were isocaloric and isovolumetric. A mylohyoid electromyogram, LES pressure and esophageal Ph were simultaneously recorded for 3 hours after ingestion of each meal on two different occasions. Results: There was no significant difference in incidence of GER between two meals. Conclusion: The intake of isocaloric and isovolumetric meals of either flour or rice cake did not result in significant discrepancies in frequency of GER. The increase in the frequency of swallow- and strain-associated GER observed in the case of a flour cake may be caused by reduced LES pressure after ingestion. (Korean Journal of Gastrointestinal Motility 2001;7:181-187)