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Search for "triazenes" in Full Text gives 7 result(s) in Beilstein Journal of Organic Chemistry.

Synthesis of substituted triazole–pyrazole hybrids using triazenylpyrazole precursors

  • Simone Gräßle,
  • Laura Holzhauer,
  • Nicolai Wippert,
  • Olaf Fuhr,
  • Martin Nieger,
  • Nicole Jung and
  • Stefan Bräse

Beilstein J. Org. Chem. 2024, 20, 1396–1404, doi:10.3762/bjoc.20.121

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  • systematically. Results and Discussion Triazenes have previously been established as versatile intermediates and linkers for conventional and solid-phase synthesis [22][23][24][25] that can be considered as protected diazonium salts [3]. According to the previous work [3], triazenylpyrazoles could serve as azide
  • predominant product (see 18i and 18j). In total, 13 groups could be attached to the different triazenylpyrazoles, yielding 18 products (see Table 1). In analogy to reported procedures for cleavage of polymer-bound triazenes [23], we attempted to develop the first protocol for synthesizing pyrazolyl azides 19
  • from triazenylpyrazoles. Initial experiments with TFA and trimethylsilyl azide at 0–25 °C in DCM failed for 4-substituted pyrazoles; the formation of the target products was only observed when 5-methylpyrazoles such as 15b were used. Therefore, a modified procedure was applied, heating the triazenes to
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Published 20 Jun 2024
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  • ][42][43][44][45][46], azulenes and their homologous compounds [32][47][48][49][50][51][52][53][54][55][56][57][58], boron dipyrromethenes (BODIPYs) [41][59][60][61], porphyrins [62][63][64], chlorophylls [65][66], triazenes [67][68], ynamides [69][70][71], arylynamines [72], indoles [73], and γ
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Published 22 Jan 2024

Synthesis of new pyrazolo[1,2,3]triazines by cyclative cleavage of pyrazolyltriazenes

  • Nicolai Wippert,
  • Martin Nieger,
  • Claudine Herlan,
  • Nicole Jung and
  • Stefan Bräse

Beilstein J. Org. Chem. 2021, 17, 2773–2780, doi:10.3762/bjoc.17.187

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  • ; triazenes; triazines; Introduction The structural motif of pyrazolotriazines, particularly the pyrazolotriazinones, has drawn attention regarding a possible application as therapeutic agents due to manifold biological activities. Amongst other known constitutional isomers such as pyrazolo[4,3-e][1,2,4
  • -methylamide-substituted aryltriazenes 7 could be efficiently converted into 3,4-dihydrobenzo[d][1,2,3]triazine derivatives 8 [37] (Scheme 2). In this context, triazenes have shown beneficial properties as they can be used as protected diazonium species which can be handled and converted in various
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Published 22 Nov 2021

A recent overview on the synthesis of 1,4,5-trisubstituted 1,2,3-triazoles

  • Pezhman Shiri,
  • Ali Mohammad Amani and
  • Thomas Mayer-Gall

Beilstein J. Org. Chem. 2021, 17, 1600–1628, doi:10.3762/bjoc.17.114

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  • . Moreover, TMS-substituted alkyne was suitable for this Huisgen reaction to achieve the desired triazole product. Next, some triazene scaffolds, such as dimethylamino-, pyrrolidine-, piperidine-, morpholine-, and piperazine-derived triazenes were screened. Aryl azides containing Br, I, Me, and MeO as well
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Published 13 Jul 2021

An overview of recent advances in duplex DNA recognition by small molecules

  • Sayantan Bhaduri,
  • Nihar Ranjan and
  • Dev P. Arya

Beilstein J. Org. Chem. 2018, 14, 1051–1086, doi:10.3762/bjoc.14.93

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Published 16 May 2018

Synthesis and chemosensing properties of cinnoline-containing poly(arylene ethynylene)s

  • Natalia A. Danilkina,
  • Petr S. Vlasov,
  • Semen M. Vodianik,
  • Andrey A. Kruchinin,
  • Yuri G. Vlasov and
  • Irina A. Balova

Beilstein J. Org. Chem. 2015, 11, 373–384, doi:10.3762/bjoc.11.43

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  • -dibromocinnolines 4a,b (Table 1). Triazenes 3a,b were synthesized from 4-bromo-2-iodophenyltriazene 1 by the Sonogashira coupling [44][45] with hexyne (2a) and TMS-protected diacetylene 2b using conditions for the one-pot TMS group removal and the Sonogashira coupling developed recently [46]. The last reaction
  • synthetic steps. 4,6-Dibromo-3-butylcinnoline (4a) and 4,6-dibromo-3-(hept-1-yn-1-yl)cinnoline (4b) were obtained from corresponding triazenes 3a,b by Richter cyclization under known conditions [43] in satisfactory and good yields. Although the Sonogashira coupling of 4-bromocinnolines has been recently
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Published 20 Mar 2015
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  •  5, entries 5, 6). Notably, good reactivity and chemoselectivity were achieved with 1-(4-bromophenyl)- and 1-(4-iodophenyl)-2-(pyrrolidin-1-yl)diazene (Table 5, entries 5, 6), showing that triazenes were more active than the corresponding aryl bromides and iodides under these reaction conditions
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Published 28 Jun 2010
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