A simple triazole-linked bispyrenyl-based xylofuranose derivative for selective and sensitive fluorometric detection of Cu2+
作者:Samiul Islam Hazarika、Goutam Mahata、Pallab Pahari、Nabakumar Pramanik、Ananta Kumar Atta
DOI:10.1016/j.ica.2020.119582
日期:2020.7
Abstract Triazole-linked xylofuranosederivatives having one pyrene or two pyrene moieties were synthesized and their fluorescence properties towards various cations and anions were investigated. Only, bis-triazoles appended bispyrenyl-based sugar derivative 1 exhibited selective and sensitive fluorescence quenching effect in the presence of Cu2+ ions over a wide range of cations and anions in acetonitrile
Construction of Chiral Tri‐ and Tetra‐Arylmethanes Bearing Quaternary Carbon Centers: Copper‐Catalyzed Enantioselective Propargylation of Indoles with Propargylic Esters
Copper‐catalyzed enantioselective propargylation of indoles with propargylic esters and sequential Huisgen cycloaddition with azides lead to the construction of chiral triarylmethanes, bearing a quaternary carboncenter, with high to excellent enantioselectivities. The result described herein can be used in the enantioselective preparation of a tetraarylmethane.
various aldehydes followed by a Cu-catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC) is reported. 1,4-Disubstituted 1,2,3-triazoles are obtained in good to excellent yields from a variety of readily available aldehydes without the need for isolation of the alkyne intermediates. The reaction has a broad scope, allows the formation of new bioconjugates and is applied for the synthesis of new boronic
Evaluation of Readily Accessible Azoles as Mimics of the Aromatic Ring of D-Phenylalanine in the Turn Region of Gramicidin S
作者:Matthijs van der Knaap、Lianne T. Lageveen、Henk J. Busscher、Roos Mars-Groenendijk、Daan Noort、José M. Otero、Antonio L. Llamas-Saiz、Mark J. van Raaij、Gijsbert A. van der Marel、Herman S. Overkleeft、Mark Overhand
DOI:10.1002/cmdc.201000539
日期:2011.5.2
d‐phenylalanine residue with substituted and unsubstituted azoles on the structure and biological activity of the antibiotic gramicidinS was investigated against a representative panel of Gram‐positive and Gram‐negative bacteria strains. Substituted triazole derivatives, obtained using a convergent synthetic strategy, are as active as gramicidinS, provided that any substituent on the triazole moiety is
Synthesis, photophysical and electrochemical properties and DSSC application of triphenylaminochalcone cored dendrimers with anthracene and pyrene as surface groups and triazolylcholanoate as the bridging unit
作者:Devaraj Anandkumar、Perumal Rajakumar
DOI:10.1039/c8nj01412d
日期:——
cored dendrimers decorated with anthracene and pyrene at the periphery have been synthesized by a convergent methodology using a click chemistry approach and characterized from spectral data and elemental analyses. All the dendrimers show excellent optical and electrochemical properties. Higher generation dendrimers exhibit better power conversion efficiency than lower-generation dendrimers when used