• Title/Summary/Keyword: Oxone

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Magnetic CoFe2O4 Nanoparticles as an Efficient Catalyst for the Oxidation of Alcohols to Carbonyl Compounds in the Presence of Oxone as an Oxidant

  • Sadri, Fariba;Ramazani, Ali;Massoudi, Abdolhossain;Khoobi, Mehdi;Azizkhani, Vahid;Tarasi, Roghayeh;Dolatyari, Leila;Min, Bong-Ki
    • Bulletin of the Korean Chemical Society
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    • v.35 no.7
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    • pp.2029-2032
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    • 2014
  • Magnetically nano-$CoFe_2O_4$ efficiently catalyzes oxidation of primary and secondary benzylic and aliphatic alcohols to give the corresponding carbonyl products in good yields. The reactions were carried out in an aqueous medium at room temperature in the presence of oxone (potassium hydrogen monopersulfate) as an oxidant. In addition, the catalysts could be reused up to 6 runs without significant loss of activities. Catalyst was characterized by SEM, XRD and IR.

Oxidative Cyclisation Based One-Pot Synthesis of 3-Substituted[1,2,4]triazolo[4,3-b]pyridazines Using Me4NBr/Oxone

  • Ruso, Jayaraman Sembian;Nagappan, Rajendiran;Kumaran, Rajendran Senthil
    • Journal of the Korean Chemical Society
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    • v.57 no.5
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    • pp.606-611
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    • 2013
  • A facile one-pot syhthesis of 3-substituted triazolopyridazine and thieno-triazolopyridazine derivatives is described. This protocol involves the preparation of heteroaryl hydrazone from the aldehyde and pyridazinohydrazine derivative followed by subjecting the intermediate directly to oxidative cyclization to assemble the desired 1,2,4-triazloe moiety by employing the mixture of Me4NBr and oxone. This condition is efficient and is able to tolerate wide range of functional groups.

Design and Synthesis of Binaphthol-Derived Chiral Ketone Catalysts for Dioxirane-Mediated Asymmetric Epoxidation of Olefins

  • 김양희;이교철;최대윤;이상기;송충의
    • Bulletin of the Korean Chemical Society
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    • v.20 no.7
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    • pp.831-834
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    • 1999
  • Binaphthol-derived chiral ketones 1a-c were synthesized and were shown to serve as active catalysts for asymmetric epoxidation of olefins using Oxone, although their enantioselectivities were not high. However, very interestingly, the stereochemical outcome of the resulting epoxides implicates that in the epoxidation using 1a-c, the planar transition state may be more favorable than the spiro transition state.

The Synthetic Utilization of 2-Hydroxymethyl-2,5-dihydrothiophene 1,1-Dioxide in the Intramolecular Diels-Alder Reaction

  • Lee, Hyo Won;Lee Woong Bae;Choi Lee Ihl-Young
    • Bulletin of the Korean Chemical Society
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    • v.15 no.6
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    • pp.448-452
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    • 1994
  • 2-Hydroxymethyl-2,5-dihydrothiophene 1,1-dioxide (1) was prepared from thiophene-2-carboxylic acid by consecutive reactions involving the Birch reduction, esterification, reduction with lithium aluminum hydride, and oxidation with Oxone$^{\circledR}$. The esterification of alcohol 1 with various unsaturated carboxylic acids provided the precursors 8 for the intramolecular Diels-Alder reaction. The cheletropic expulsion of sulfur dioxide from the esters 8 followed by intramolecular Diels-Alder reaction furnished bicyclic ${\gamma}$-and ${\delta}$-lactones.

Antimicrobial Activities of Novel 3-Substituted [1,2,4] Triazolo[4,3-b]pyridazines Derivatives

  • Ruso, Jayaraman Sembian;Rajendiran, Nagappan;Srinivas, Chowdappa;Murthy, Konappa Narasimha;Soumya, Krishnamurthy
    • Journal of the Korean Chemical Society
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    • v.58 no.4
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    • pp.377-380
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    • 2014
  • A noval derivatives of 3-substituted[1,2,4]triazolo[4,3-b]pyridazine (4a-4o) and 7,8,9,10-tetrahydrobenzo[4,5] thieno[2,3-d][1,2,4]triazolo[4,3-b]pyridazine (7a-7l) is prepared by the reaction of heteroaryl hydrazone from the aldehyde and pyridazinohydrazine derivative, followed by subjecting the intermediate directly to oxidative cyclization employing the mixture of $Me_4NBr$ and Oxone. These derivatives were subjected to preliminary antimicrobial activities against microorganism. All these compounds exhibit good to moderate activity.