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Volumn , Issue 26, 2008, Pages 4440-4445

Copper zeolites as green catalysts for multicomponent reactions of aldehydes, terminal alkynes and amines: An efficient and green synthesis of propargylamines

Author keywords

Alkynes; Amines; Copper; Multicomponent reactions; Zeolites

Indexed keywords


EID: 53849085515     PISSN: 1434193X     EISSN: 10990690     Source Type: Journal    
DOI: 10.1002/ejoc.200800359     Document Type: Article
Times cited : (135)

References (47)
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    • for Ag-catalyzed reactions, see: g Z. Li, C. Wei, L. Chen, R. S. Varma, C.-J. Li, Tetrahedron Lett. 2004, 45, 2443-2447;
    • for Ag-catalyzed reactions, see: g) Z. Li, C. Wei, L. Chen, R. S. Varma, C.-J. Li, Tetrahedron Lett. 2004, 45, 2443-2447;
  • 29
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    • for Au-catalyzed reactions, see: i V. K.-Y. Lo, Y. Liu, M.-K. Wong, C.-M. Che, Org. Lett. 2006, 8, 1529-1532;
    • for Au-catalyzed reactions, see: i) V. K.-Y. Lo, Y. Liu, M.-K. Wong, C.-M. Che, Org. Lett. 2006, 8, 1529-1532;
  • 31
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    • for Zn-catalyzed reactions, see: k E. Ramu, R. Varala, N. Sreelatha, S. R. Adapa, Tetrahedron Lett. 2007, 48, 7184-7190;
    • for Zn-catalyzed reactions, see: k) E. Ramu, R. Varala, N. Sreelatha, S. R. Adapa, Tetrahedron Lett. 2007, 48, 7184-7190;
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    • for Ru-catalyzed reactions, see: l V. Cadierno, J. Gimeno, N. Nebra, Chem. Eur. J. 2007, 13, 9973-9998.
    • for Ru-catalyzed reactions, see: l) V. Cadierno, J. Gimeno, N. Nebra, Chem. Eur. J. 2007, 13, 9973-9998.
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    • during the submission-revision of the present manuscript, a similar reaction was reported, see: R. Maggi, A. Bello, C. Oro, G. Sartori, L. Soldi, Tetrahedron 2008, 64, 1435-1439.
    • during the submission-revision of the present manuscript, a similar reaction was reported, see: R. Maggi, A. Bello, C. Oro, G. Sartori, L. Soldi, Tetrahedron 2008, 64, 1435-1439.
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    • I species based on the theoretical number of native acidic sites of the corresponding H-zeolite. For recent methods of determination of Brønsted acid sites on zeolites, see: B. Louis, S. Walspurger, J. Sommer, Catal. Lett. 2004, 93, 81-84;
    • I species based on the theoretical number of native acidic sites of the corresponding H-zeolite. For recent methods of determination of Brønsted acid sites on zeolites, see: B. Louis, S. Walspurger, J. Sommer, Catal. Lett. 2004, 93, 81-84;
  • 44
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    • The catalyst was reactivated by calcination at 300°C in a stream of air for 1 h. With practical synthetic aspects in mind, the zeolite catalyst was also reused as such, without reactivation. In this case, a slow but regular decrease in efficiency was observed (see Figure). It is known that deactivation occurred by coke slowly building up in the zeolite pores. (Graph Presented)
    • The catalyst was reactivated by calcination at 300°C in a stream of air for 1 h. With practical synthetic aspects in mind, the zeolite catalyst was also reused as such, without reactivation. In this case, a slow but regular decrease in efficiency was observed (see Figure). It is known that deactivation occurred by coke slowly building up in the zeolite pores. (Graph Presented)
  • 45
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    • Applying the H/D titration method that we developed for the determination of acidic sites in zeolites[12] to H-USY treated with CuCl revealed that the H/Cu exchange process was not complete and ca. 20% of the acidic sites remained
    • [12] to H-USY treated with CuCl revealed that the H/Cu exchange process was not complete and ca. 20% of the acidic sites remained.
  • 46
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    • Such a coordination/deprotonation/acetylide formation sequence has been demonstrated for silver ions, see: U. Halbes-Letinois, P. Pale, S. Berger, J. Org. Chem. 2005, 70, 9185-9190
    • Such a coordination/deprotonation/acetylide formation sequence has been demonstrated for silver ions, see: U. Halbes-Letinois, P. Pale, S. Berger, J. Org. Chem. 2005, 70, 9185-9190.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.