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Volumn 28, Issue 16, 2009, Pages 4689-4699

"Click" immobilization of organometallic pincer catalysts for C - C coupling reactions

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVE CATALYST; ALLYL CHLORIDES; ALLYLIC ALKYLATION; C-C COUPLING REACTIONS; ELEMENTAL CONTENTS; ETHYL CYANOACETATE; ETHYNYL; FUNCTIONALIZED; FUNCTIONALIZED SILICA; HIGH YIELD; HOMOGENEOUS CATALYST; HOMOGENEOUS FORMS; LEWIS ACID CATALYSTS; METHYL VINYL KETONES; MICHAEL ADDITION REACTIONS; MODEL SYSTEM; N-O COMPLEXES; NOVEL MATERIALS; PALLADIUM CATALYST; PINCER COMPLEXES; PORE VOLUME; SILICA MATERIAL; SUPPORT MATERIALS; SURFACE AREA MEASUREMENT; SURFACE AREA SILICAS; TETHERED COMPLEXES;

EID: 68949175681     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om900237g     Document Type: Article
Times cited : (71)

References (76)
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    • Morales-Morales, M, Jensen, C. M, Eds, Elsevier: Amsterdam
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    • (2007) The Chemistry of Pincer Compounds
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    • DRIFT-IR (diffuse reflectance Fourier transform) is a surface technique that analyzes reflected IR beam from the surface/near surface of the material
    • DRIFT-IR (diffuse reflectance Fourier transform) is a surface technique that analyzes reflected IR beam from the surface/near surface of the material.
  • 69
    • 68949191567 scopus 로고    scopus 로고
    • ATR-IR (attenuated total reflection) is a technique whereby transmission of an IR beam through a sample is measured
    • ATR-IR (attenuated total reflection) is a technique whereby transmission of an IR beam through a sample is measured.
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    • McDonald, A. R.; van Klink, G. P. M.; van Koten, G., submitted work.
    • McDonald, A. R.; van Klink, G. P. M.; van Koten, G., submitted work.
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    • a of free triazole, and its attraction for a proton, which we believe does not give a strong argument for this particular study. Ripin, D. H.; Evans, D. H. Chem 206. http://www2.lsdiv.harvard.edu/labs/evans/pdf/evans-pKa-table.pdf.
    • a of free triazole, and its attraction for a proton, which we believe does not give a strong argument for this particular study. Ripin, D. H.; Evans, D. H. Chem 206. http://www2.lsdiv.harvard.edu/labs/evans/pdf/evans-pKa-table.pdf.
  • 76
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    • An alternative explanation for the high catalytic activity of materials 3, 4, and 7 could be that capped silanol groups have become deprotected. Recent work has demonstrated that functionalized amines have been tethered to a silica/zeolite support and the resulting materials were applied in the double Michael addition reaction. However, that work requires that remnant acid sites (uncapped silanol groups) play a role in the catalysis. We have capped all silanol groups to the best of our knowledge, with the hope of avoiding effects from the inorganic support, and therefore we believe this option to be unlikely. Furthermore, postcatalysis DRIFT-IR of the supported catalytic material shows minimal changes in the SiOH region of the spectrum, suggesting the silanol group capping has not been affected. See: Motokura, K, Tada, M, Iwasawa, Y. J. Am. Chem. Soc. 2007, 129, 9540-9541
    • An alternative explanation for the high catalytic activity of materials 3, 4, and 7 could be that capped silanol groups have become deprotected. Recent work has demonstrated that functionalized amines have been tethered to a silica/zeolite support and the resulting materials were applied in the double Michael addition reaction. However, that work requires that remnant acid sites (uncapped silanol groups) play a role in the catalysis. We have capped all silanol groups to the best of our knowledge, with the hope of avoiding effects from the inorganic support, and therefore we believe this option to be unlikely. Furthermore, postcatalysis DRIFT-IR of the supported catalytic material shows minimal changes in the SiOH region of the spectrum, suggesting the silanol group capping has not been affected. See: Motokura, K.; Tada, M.; Iwasawa, Y. J. Am. Chem. Soc. 2007, 129, 9540-9541.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.