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Search for "diketones" in Full Text gives 129 result(s) in Beilstein Journal of Organic Chemistry.

Chemoselective reduction of aldehydes by ruthenium trichloride and resin- bound formates

  • Basudeb Basu,
  • Bablee Mandal,
  • Sajal Das,
  • Pralay Das and
  • Ashis K. Nanda

Beilstein J. Org. Chem. 2008, 4, No. 53, doi:10.3762/bjoc.4.53

Graphical Abstract
  • -donor, in the presence of catalytic ruthenium trichloride is described. Aromatic aldehydes and 1,2-diketones are reduced efficiently and selectively, while aryl ketones remain unchanged. Several other potentially reducible groups attached to the aromatic moiety are unaffected. Keywords: Amberlite
  • stable and potent hydride source in Pd-catalyzed transfer hydrogenation of functionalized alkenes, imines, nitroarenes and 1,2-diketones [23][24]. Danks et al. also carried out reduction of alkyl cinnamates using polymer supported formate and catalytic RhCl(PPh3)3 (2.5 mol%) under microwave irradiation
  • without any base preclude possibilities of unwanted reactions of aryl aldehydes, e.g. Cannizzaro reaction. To broaden the scope of the catalytic system, we tested CTH of 1,2-diketones under similar conditions (Scheme 2). Whereas aryl ketones were not reduced under the conditions, reduction of benzil to
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Preliminary Communication
Published 19 Dec 2008

Trapping evidence for the thermal cyclization of di-(o-acetylphenyl)acetylene to 3,3'-dimethyl- 1,1'-biisobenzofuran

  • Charles P. Casey,
  • Neil A. Strotman and
  • Ilia A. Guzei

Beilstein J. Org. Chem. 2005, 1, No. 18, doi:10.1186/1860-5397-1-18

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  • reactions with oxygen, either in the presence or absence of light, to give diketones as the predominant products.[4][5][6][7] The bicyclization process considered for the conversion of 1 to A is analogous to the thermal rearrangement of a 2,6-alkadien-4-yn-1,8-dialdehyde to a bifuran observed by Iyoda[8
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Preliminary Communication
Published 09 Dec 2005

New modification of the Perkow reaction: halocarboxylate anions as leaving groups in 3-acyloxyquinoline- 2,4(1H,3H)-dione compounds

  • Oldřich Paleta,
  • Karel Pomeisl,
  • Stanislav Kafka,
  • Antonín Klásek and
  • Vladislav Kubelka

Beilstein J. Org. Chem. 2005, 1, No. 17, doi:10.1186/1860-5397-1-17

Graphical Abstract
  • according to the Michaelis-Arbuzov reaction,[4] the α-halocarbonyl compounds react with triethylphosphite to form enol phosphites 3 as a product of the Perkow reaction (Scheme 2). [5] The reaction is otherwise known to take place in halogenated ketones, diketones, aldehydes and also in some halogenoesters
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Preliminary Communication
Published 09 Dec 2005

A convenient synthesis of γ-functionalized cyclopentenones

  • Nour Lahmar,
  • Taïcir Ben Ayed,
  • Moncef Bellassoued and
  • Hassen Amri

Beilstein J. Org. Chem. 2005, 1, No. 11, doi:10.1186/1860-5397-1-11

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  • /1860-5397-1-11 Abstract The synthesis of γ-functionalized cyclopentenones was carried out in a few steps, starting firstly with the preparation of nitroketonic intermediates 2, which were readily transformed into 1,4-diketones using the Nef conversion. The intramolecular cyclization of the γ-diketones
  • 3 in a basic medium, led to the functionalized cyclopentenones 4. Keywords: Nef reaction; conjugated addition; nitroalkanes; 1,4-diketones; functionalized cyclopentenones; Introduction The cyclopentenones are considered as an important class of compounds because they are present in a large variety
  • conjugate addition of nitroalkanes to α,β-unsaturated ketones 1 leading to the nitroalkanes derivatives 2 which may be converted into their γ-diketone homologues 3 using Nef reaction. The intramolecular cyclization of 1,4-diketones 3 led to the corresponding cyclopentenones 4. Results and discussion As
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Published 07 Oct 2005
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