• Title/Summary/Keyword: Benzothiazoles

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2-Benzothiazolylhydrazones with Cation Radicals in Nitrile Solvents. Formations of 1,2,4-Triazoles and Triazolo[3,4-b]benzothiazoles

  • Park, Gun Ha;Jeon, Geon;O, Si Hwa
    • Bulletin of the Korean Chemical Society
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    • v.21 no.4
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    • pp.425-428
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    • 2000
  • Arenealdehyde 2-benzothiazolylhydrazone in thianthrene cation radicalafforded triazolo[3,4-b]benzothiazoles and 1,2,4-triazoles as major and minor product, respectively. On the contrary the similar reaction in tris(2,4-dibromophenyl)aminium hexachloroantimonate gave 1,2,4-triazoles and triazolo[3,4-b]benzothiazoles as ma-jor and minor product, respectively.

One-pot Synthesis of Benzimidazoles and Benzothiazoles in the Presence of Fe(HSO4)3 as a New and Efficient Oxidant

  • Eshghi, Hossein;Rahimizadeh, Mohammad;Shiri, Ali;Sedaghat, Parisa
    • Bulletin of the Korean Chemical Society
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    • v.33 no.2
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    • pp.515-518
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    • 2012
  • A series of substituted benzimidazoles and benzothiazoles were prepared through the one-pot reaction of ophenylenediamine and o-aminothiophenol with various aldehydes in the presence of ferric hydrogensulfate both in EtOH and water as solvent. The reactions proceed smoothly in excellent yield, high chemoselectivity and with an easy work-up.

Synthesis of 2-Arylbenzothiazoles Catalyzed by Biomimetic Catalyst, β-Cyclodextrin

  • Londhe, Balaji S.;Pratap, Umesh R.;Mali, Jyotirling R.;Mane, Ramrao A.
    • Bulletin of the Korean Chemical Society
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    • v.31 no.8
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    • pp.2329-2332
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    • 2010
  • Cyclocondensation of 2-aminothiophenol and aryl/heteryl aldehydes has been carried using biomimetic catalyst, $\beta$-Cyclodextrin in water and obtained 2-aryl/heteryl benzothiazoles with better to excellent yields. This biomimetic catalyzed route is simple, economic, and environmentally benign.