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Volumn 1, Issue 6, 2011, Pages 607-610

Highly efficient catalytic system for C-H activation: A practical approach to angiotensin II receptor blockers

Author keywords

biaryls; C H activation; cross coupling; green chemistry; ruthenium

Indexed keywords

ANGIOTENSIN II; BIARYLS; C-H ACTIVATION; CATALYTIC SYSTEM; CROSS-COUPLINGS; GREEN CHEMISTRY;

EID: 79958192763     PISSN: 21555435     EISSN: None     Source Type: Journal    
DOI: 10.1021/cs200044t     Document Type: Article
Times cited : (56)

References (67)
  • 60
    • 79958208365 scopus 로고    scopus 로고
    • note
    • 2O with phosphine ligands have been reported in different types of reactions such as a hydroarylation employing ketones as the substrate. (31)
  • 61
    • 79958206874 scopus 로고    scopus 로고
    • Lower catalyst loadings were reported employing Pd catalyst. (42, 50) However, they need expensive phosphine ligands
    • Lower catalyst loadings were reported employing Pd catalyst. (42, 50) However, they need expensive phosphine ligands.
  • 62
    • 79958226239 scopus 로고    scopus 로고
    • Clarification of the role of water in the reaction needs further investigation. It may act as an effective ligand in the transient Ru complex or may facilitate the dissolution of the Ru complex in NMP
    • Clarification of the role of water in the reaction needs further investigation. It may act as an effective ligand in the transient Ru complex or may facilitate the dissolution of the Ru complex in NMP.
  • 63
    • 79958193449 scopus 로고    scopus 로고
    • (Teva Pharmaceutical Industries Ltd.), Patent WO2008/027385A2 (priority date: August 29))
    • Kumar, K. V.; Dhirenkumar, M.; Sanjay, N., V.; Vijaykumar, D., L., L. (Teva Pharmaceutical Industries Ltd.), Patent WO2008/027385A2 (priority date: August 29, 2006)).
    • (2006)
    • Kumar, K.V.1    Dhirenkumar, M.2    Sanjay, N.V.3    Vijaykumar, D.L.L.4
  • 64
    • 79958209025 scopus 로고    scopus 로고
    • In the case of a hydroarylation employing ketones as the substrate, better results were reported by the use of phosphines bearing an electron-withdrawing group. (31)
    • In the case of a hydroarylation employing ketones as the substrate, better results were reported by the use of phosphines bearing an electron-withdrawing group. (31)
  • 65
    • 79958199858 scopus 로고    scopus 로고
    • The Pd/C catalysts tested in this study have two types of Pd distribution: egg shell and thick shell. In the egg shell type catalyst, Pd distributes close to the surface within 50-150 nm depth. The thick shell type catalyst denotes the one whose Pd distributes until 200-500 nm from the surface
    • The Pd/C catalysts tested in this study have two types of Pd distribution: egg shell and thick shell. In the egg shell type catalyst, Pd distributes close to the surface within 50-150 nm depth. The thick shell type catalyst denotes the one whose Pd distributes until 200-500 nm from the surface.
  • 66
    • 79958220444 scopus 로고    scopus 로고
    • The use of 2b as the substrate increases the atom efficiency (8) by 170% compared to the previously employed 5-(2'-boronophenyl)-2-(triphenylmethyl)-2 H -tetrazole, a well documented substrate for the Suzuki coupling. (5)
    • The use of 2b as the substrate increases the atom efficiency (8) by 170% compared to the previously employed 5-(2'-boronophenyl)-2-(triphenylmethyl)-2 H -tetrazole, a well documented substrate for the Suzuki coupling. (5)
  • 67
    • 79958186087 scopus 로고    scopus 로고
    • note
    • 3 (2 equiv) at room temperature and then heating the mixture at 140 °C for 12 h resulted in a poor yield of 4b (42%). It may demonstrate that the transient Ru complex is unstable (active), and, to achieve a higher conversion, the substrates need to coexist with the active catalyst species formed in situ during the reaction.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.