Synthesis of 1,2,3-triazole and 1,2,3,4-tetrazole-fused glycosides and nucleosides by an intramolecular 1,3-dipolar cycloaddition reaction
作者:Ramakrishna I. Anegundi、Vedavati G. Puranik、Srinivas Hotha
DOI:10.1039/b716996e
日期:——
Various 1,2,3-triazole and 1,2,3,4-tetrazole fused multi-cyclic compounds were synthesized from carbohydrate derived azido-alkyne and azido-cyanide substrates. The acid sensitive 1,2-O-isopropylidene group of the furanosyl sugar was utilized for diversification to glycosides and nucleosides under Fischer glycosidation and Vorbruggen's conditions, respectively.
Synthesis and Exploitation of the Biological Profile of Novel Guanidino Xylofuranose Derivatives**
作者:Andreia Fortuna、Rita Gonçalves‐Pereira、Paulo J. Costa、Radek Jorda、Veronika Vojáčková、Gabriel Gonzalez、Niels V. Heise、René Csuk、M. Conceição Oliveira、Nuno M. Xavier
DOI:10.1002/cmdc.202200180
日期:2022.7.19
Promising leads: The synthesis and biological evaluation of novel guanidino sugars as nucleoside analogs, including 3-O-substituted guanidino xylofuranoses, a 3-O-methyl-branched N-benzyltriazole isonucleoside and a guanidinomethyltriazole 5′-isonucleoside, is described. Two compounds were demonstrated to inhibit selectively acetylcholinesterase or to display antiproliferative effects in K562 and MCF-7
Synthesis of triazole-fused tetracyclic glycosides in aqueous medium: application of nanodomain cubic cuprous oxide as reusable catalyst in one-pot domino Sonogashira-cyclization
作者:Nivedita Chatterjee、Rammyani Pal、Swarbhanu Sarkar、Asish Kumar Sen
DOI:10.1016/j.tetlet.2015.04.106
日期:2015.6
An environmentally benign one-pot procedure has been developed for the syntheses of triazole-fused tetracyclic glycosides in aqueous medium. The two step one-pot synthesis involves Sonogashira reaction between azido-alkynes and aryl halides followed by intramolecular 1,3-dipolar cyclization using cubic cuprous oxide nanoparticles as reusable catalyst, under aerobic condition. The method excludes the use of any surfactants or additional ligands as stabilizing agents. The catalyst could be used up to three recycles without any loss of catalytic activity. The method has a broad perspective for the synthesis of medium size ring systems. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of Triazole‐Containing Furanosyl Nucleoside Analogues and Their Phosphate, Phosphoramidate or Phoshonate Derivatives as Potential Sugar Diphosphate or Nucleotide Mimetics
作者:Andreia Fortuna、Paulo J. Costa、M. Fátima M. Piedade、M. Conceição Oliveira、Nuno M. Xavier
DOI:10.1002/cplu.202000424
日期:2020.8
The synthesis of stable and potentially bioactive xylofuranosyl nucleoside analogues and potential sugar diphosphate or nucleotide mimetics comprising a 1,2,3‐triazole moiety is reported. 3′‐O‐Methyl‐branched N‐benzyltriazole isonucleosides were accessed in 5–7 steps and 42–54 % overall yields using a Cu(I)‐catalyzed cycloaddition of 3‐O‐propargyl‐1,2‐O‐isopropylidene‐α‐D‐xylofuranose with benzyl azide
Expedient synthesis of 1,2,3-triazole-fused tetracyclic compounds by intramolecular Huisgen (‘click’) reactions on carbohydrate-derived azido-alkynes
作者:Srinivas Hotha、Ramakrishna I. Anegundi、Arvind A. Natu
DOI:10.1016/j.tetlet.2005.05.012
日期:2005.7
An efficient, practical and convenient synthesis of 1,2,3-triazole-fused tetracyclic compounds was achieved by intramolecular 1,3-dipolar cycloaddition of carbohydrate-derived azido-alkynes.