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Volumn 45, Issue 31, 2004, Pages 6029-6032

Multifunctional catalysis of a ruthenium-grafted hydrotalcite: One-pot synthesis of quinolines from 2-aminobenzyl alcohol and various carbonyl compounds via aerobic oxidation and aldol reaction

Author keywords

2 Aminobenzyl alcohol; Heterogeneous catalyst; Hydrotalcite; Molecular oxygen; Quinoline synthesis; Ruthenium

Indexed keywords

2 AMINOBENZYL ALCOHOL; ALCOHOL; CARBONYL DERIVATIVE; HYDROTALCITE; QUINOLINE DERIVATIVE; RUTHENIUM; UNCLASSIFIED DRUG;

EID: 3142700696     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2004.06.023     Document Type: Article
Times cited : (123)

References (34)
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    • For excellent reports of one-pot syntheses, see: Koeller K.M., Wong C.-H. Chem. Rev. 100:2000;4465
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    • For one-pot syntheses using multifunctional heterogeneous catalysts, see:
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    • A recent review of hydrotalcite catalysts, see:
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    • Hydrotalcite was available from TOMITA Pharmaceutical Co., Ltd
    • Hydrotalcite was available from TOMITA Pharmaceutical Co., Ltd
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    • The preparation of the Ru/HT and other Ru catalysts: see Ref. 7
    • The preparation of the Ru/HT and other Ru catalysts: see Ref. 7
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    • 3142679350 scopus 로고    scopus 로고
    • We think that the role of triethylamine is neutralization of HCl generated by the chemical absorption of the Ru species onto the HT surface
    • We think that the role of triethylamine is neutralization of HCl generated by the chemical absorption of the Ru species onto the HT surface
  • 26
    • 3142767477 scopus 로고    scopus 로고
    • 2 atmosphere. After 20 h, the catalyst was separated by filtration. The filtrate was evaporated, and the crude product was purified by column chromatography (silica gel, ethyl acetate-hexane (1:9) mixture), which afforded the desired product, 2-phenylquinoline (1.82 g, 89% yield)
    • 2 atmosphere. After 20 h, the catalyst was separated by filtration. The filtrate was evaporated, and the crude product was purified by column chromatography (silica gel, ethyl acetate-hexane (1:9) mixture), which afforded the desired product, 2-phenylquinoline (1.82 g, 89% yield)
  • 27
    • 3142676401 scopus 로고    scopus 로고
    • Recycling experiment of the Ru/HT-N is as follows. The reaction of 2-aminobenzyl alcohol (1.0 mmol) and acetophenone (1.2 mmol) in toluene (8 mL) with Ru/HT-N (0.30 g, Ru: 0.03 mmol) and MS4A (0.3 g) was carried out under reflux. After 20 h, the Ru/HT-N was removed by filtration and GC analysis of the filtrate showed an 84% yield of 2-phenylquinoline. The recovered Ru/HT-N was washed with toluene, acetone, and water successively, and then dried in vacuo before reuse. The recycling reaction using the spent Ru/HT-N catalyst afforded the quinoline in 81% GC yield under same reaction conditions
    • Recycling experiment of the Ru/HT-N is as follows. The reaction of 2-aminobenzyl alcohol (1.0 mmol) and acetophenone (1.2 mmol) in toluene (8 mL) with Ru/HT-N (0.30 g, Ru: 0.03 mmol) and MS4A (0.3 g) was carried out under reflux. After 20 h, the Ru/HT-N was removed by filtration and GC analysis of the filtrate showed an 84% yield of 2-phenylquinoline. The recovered Ru/HT-N was washed with toluene, acetone, and water successively, and then dried in vacuo before reuse. The recycling reaction using the spent Ru/HT-N catalyst afforded the quinoline in 81% GC yield under same reaction conditions
  • 28
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    • For aerobic oxidation of alcohols to carbonyl compounds using supported Ru catalysts, see:
    • For aerobic oxidation of alcohols to carbonyl compounds using supported Ru catalysts, see: Yamaguchi K., Mori K., Mizugaki T., Ebitani K., Kaneda K. J. Am. Chem. Soc. 122:2000;7144
    • (2000) J. Am. Chem. Soc. , vol.122 , pp. 7144
    • Yamaguchi, K.1    Mori, K.2    Mizugaki, T.3    Ebitani, K.4    Kaneda, K.5
  • 30
    • 3142721810 scopus 로고    scopus 로고
    • Both oxidation and aldol reaction occurred on the Ru/HT surface, because the reactions completely stopped when the solid catalyst was removed by simple filtration
    • Both oxidation and aldol reaction occurred on the Ru/HT surface, because the reactions completely stopped when the solid catalyst was removed by simple filtration
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    • A review of transition metal-catalyzed hydrogen transfer reactions, see:
    • A review of transition metal-catalyzed hydrogen transfer reactions, see: Zassinovich G., Mestronl G., Gladiali S. Chem. Rev. 92:1992;1051
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.