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Search for "2,2′-bipyridine" in Full Text gives 57 result(s) in Beilstein Journal of Organic Chemistry.

CuCl-catalyzed aerobic oxidation of 2,3-allenols to 1,2-allenic ketones with 1:1 combination of phenanthroline and bipyridine as ligands

  • Shuxu Gao,
  • Yu Liu and
  • Shengming Ma

Beilstein J. Org. Chem. 2011, 7, 396–403, doi:10.3762/bjoc.7.51

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  • order to improve the yield further, we examined the effect of ligands. When 2,2'-bipyridine, which has a weaker coordinating ability, was used [36], the yield of 2a was lower (Table 3, entry 2). With 4,7-diphenyl-1,10-phenanthroline the yield was slightly improved to 66% (Table 3, entry 3). These
  • , it was interesting to observe that when 4,7-diphenyl-1,10-phenanthroline and 2,2'-bipyridine were mixed in the ratio of 1:1 [37][38], the isolated yield was improved to 82% (Table 3, entry 6). The yield with 1,10-phenanthroline and 2,2'-bipyridine (1:1) was 83% (Table 3, entry 10). However, 4,7
  • -diphenyl-1,10-phenanthroline is relatively expensive (1 g, $ 94, Aldrich), so the cheaper 1,10-phenanthroline (5 g, $ 26.4, Aldrich) was used for further study. The effect of ratio of 1,10-phenanthroline vs 2,2'-bipyridine on the yield was also studied: A ratio of 1:1 proved to be the best (Table 3
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Published 07 Apr 2011

Tandem catalysis of ring-closing metathesis/atom transfer radical reactions with homobimetallic ruthenium–arene complexes

  • Yannick Borguet,
  • Xavier Sauvage,
  • Guillermo Zaragoza,
  • Albert Demonceau and
  • Lionel Delaude

Beilstein J. Org. Chem. 2010, 6, 1167–1173, doi:10.3762/bjoc.6.133

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  • complex [RuCl2(=CHPh)(SIMes)(PCy3)], CuCl, and dHbipy (SIMes is 1,3-dimesitylimidazolin-2-ylidene, dHbipy is 4,4'-di-n-heptyl-2,2'-bipyridine) was able to promote the ATRA of trichloroacetic acid onto cyclopentadiene followed by a lactonization into 3,3-dichloro-3,3a,4,6a-tetrahydro-2H-cyclopenta[b]furan
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Published 08 Dec 2010

Miniemulsion polymerization as a versatile tool for the synthesis of functionalized polymers

  • Daniel Crespy and
  • Katharina Landfester

Beilstein J. Org. Chem. 2010, 6, 1132–1148, doi:10.3762/bjoc.6.130

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  • polymer dissolved in toluene. The synthesis of fluorescent conjugated particles of poly(arylene diethynylenes) in direct miniemulsions by Glaser coupling has also been reported [133]. 4,4'-Dinonyl-2,2'-bipyridine was found to be a suitable ligand for solubilizing the copper(I) chloride catalyst in the
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Published 01 Dec 2010

Hybrid biofunctional nanostructures as stimuli-responsive catalytic systems

  • Gernot U. Marten,
  • Thorsten Gelbrich and
  • Annette M. Schmidt

Beilstein J. Org. Chem. 2010, 6, 922–931, doi:10.3762/bjoc.6.98

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  • functionality under the polymerization conditions [33]. The catalytic system employed in the synthesis is based on copper(I) bromide and 2,2´-bipyridine in a DMSO solution. After 24 h of stirring at ambient temperature, viscous, deep brown magnetic dispersions are obtained. The success of the surface-initiated
  • solution (Fluka, 25%), Nα-benzoyl-D,L-arginin-4-nitroanilide hydrochloride (BAPNA) (Sigma, 98%), benzylamine (BzA) (Janssen Chimica), 2,2´-bipyridine (bpy) (Aldrich, 99%), citric acid monohydrate (Grüssing GmbH, 99,5%), (4-(chloromethyl)phenyl)trimethoxysilane (CPS) (ABCR, 95%), copper(I) bromide (CuBr
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Published 16 Sep 2010

Molecular recognition of organic ammonium ions in solution using synthetic receptors

  • Andreas Späth and
  • Burkhard König

Beilstein J. Org. Chem. 2010, 6, No. 32, doi:10.3762/bjoc.6.32

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  • stationary phase for enantioseparation of racemic protonated primary arylalkyl amines [153]. Comparable enantioselectivities with a stronger co-ordinating ligand can be achieved using a crown ether bearing a bispyridyl (bpy) unit in the ring (23). A series of these C2-symmetric 2,2-bipyridine-containing
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Published 06 Apr 2010

Size selective recognition of small esters by a negative allosteric hemicarcerand

  • Holger Staats and
  • Arne Lützen

Beilstein J. Org. Chem. 2010, 6, No. 10, doi:10.3762/bjoc.6.10

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  • Holger Staats Arne Lutzen University of Bonn, Kekulé-Institute of Organic Chemistry and Biochemistry, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany 10.3762/bjoc.6.10 Abstract A bis(resorcinarene) substituted 2,2′-bipyridine was found to bind weakly to small esters like ethyl acetate whereas more
  • resorcinarene moieties in different directions so that they cannot act cooperatively in the binding of the substrate. Keywords: allosteric receptors; 2,2′-bipyridine; hemicarcerand; molecular recognition; resorcin[4]arene; Introduction Nature uses allosteric effects in a very elegant manner to control
  • 2,2′-bipyridine. This structure has proved to be an excellent allosteric centre [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] due to its well defined ability to switch between syn- and an anti-conformations [27]. Recently, we were able to synthesize a number of
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Published 03 Feb 2010

Functional properties of metallomesogens modulated by molecular and supramolecular exotic arrangements

  • Alessandra Crispini,
  • Mauro Ghedini and
  • Daniela Pucci

Beilstein J. Org. Chem. 2009, 5, No. 54, doi:10.3762/bjoc.5.54

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  • -mesogenic 4,4′-disubstituted 2,2′-bipyridine ligands with Pt(II) salts confirmed the role of coordination chemistry in the metal-mediated formation of liquid crystals. Indeed the induction of a dipole moment upon coordination with an MX2 moiety, allowed most of the half-disc shaped complexes [LnPtX2
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Published 12 Oct 2009
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