Palladium-catalyzed cross-coupling reaction of azides with isocyanides
作者:Zhen Zhang、Zongyang Li、Bin Fu、Zhenhua Zhang
DOI:10.1039/c5cc05981j
日期:——
A palladium-catalyzed cross-coupling reaction of azides with isocyanides is developed, providing a general synthetic route to unsymmetric carbodiimides.
A new series of coumarin-1,2,3-triazole conjugates with varied alkyl, phenyl and heterocycle moieties at C-4 of the triazole nucleus were synthesized using a copper(I)-catalysed Huisgen 1,3-dipolar cycloaddition reaction of corresponding O-propargylated coumarin (3) or N-propargylated coumarin (6) with alkyl or aryl azides. Based on their minimal inhibitory concentrations (MICs) against selected microorganisms
An Easy Access to Aryl Azides from Aryl Amines under Neutral Conditions<sup />
作者:Jagattaran Das、Santoshkumar N. Patil、Riti Awasthi、C. Prasad Narasimhulu、Sanjay Trehan
DOI:10.1055/s-2005-869974
日期:——
A variety of substituted aryl amines were transformed into aryl azides using t-BuONO and moist NaN3 in t-BuOH in good to excellent yields. Smooth transformation was observed with anilines, having electron withdrawing and donating groups. Both acid- and base-sensitive groups survived the reaction conditions.
Synthesis of <scp>d</scp>-glyco-alkynone derivatives <i>via</i> carbonylative Sonogashira reaction
作者:Mariana P. Darbem、C. Henrique A. Esteves、Isadora M. de Oliveira、Joel S. Reis、Daniel C. Pimenta、Hélio A. Stefani
DOI:10.1039/c9ra00523d
日期:——
A carbonylative Sonogashira coupling approach to the synthesis of glyco-alkynones is described. Eighteen examples were obtained in moderate do nearly quantitative yields under mild conditions employing Mo(CO)6 as a safe carbon monoxide source. Functionalization of the alkynyl moiety via cycloaddition with organic azides provided six examples of glyco-triazoles.
Synthesis and biological evaluation of triazole-containing N-acyl homoserine lactones as quorum sensing modulators
作者:Danielle M. Stacy、Sebastian T. Le Quement、Casper L. Hansen、Janie W. Clausen、Tim Tolker-Nielsen、Jacob W. Brummond、Michael Givskov、Thomas E. Nielsen、Helen E. Blackwell
DOI:10.1039/c2ob27155a
日期:——
motivated us to evaluate triazole-containing analogs of natural N-acyl L-homoserine lactone (AHL) signals as non-native QS agonists and antagonists in Gram-negative bacteria. We synthesized 72 triazole derivatives of five broad structure types in high yields and purities using efficient Cu(I)-catalyzed azide–alkyne couplings. These compounds were evaluated for their ability to activate or inhibit two