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The Kinetic and Analytical Aspects of Enzyme Competitive Inhibition: Sensing of Tyrosinase Inhibitors.
Attaallah R, Amine A. Attaallah R, et al. Biosensors (Basel). 2021 Sep 8;11(9):322. doi: 10.3390/bios11090322. Biosensors (Basel). 2021. PMID: 34562912
Three inhibitors were used in this study: benzoic acid, sodium azide, and kojic acid, and the obtained values for fifty percent of inhibition (IC(50)) were 119 M, 1480 M, and 30 M, respectively. ...Under optimized conditions, the proposed biosensor showed a linear amperome …
Three inhibitors were used in this study: benzoic acid, sodium azide, and kojic acid, and the obtained values for fifty percent of in …
Mechanistic Investigation of the Iron-Catalyzed Azidation of Alkyl C(sp(3))-H Bonds with Zhdankin's lambda(3)-Azidoiodane.
Day CS, Fawcett A, Chatterjee R, Hartwig JF. Day CS, et al. J Am Chem Soc. 2021 Sep 24. doi: 10.1021/jacs.1c07330. Online ahead of print. J Am Chem Soc. 2021. PMID: 34559970
An in-depth study of the mechanism of the azidation of C(sp(3))-H bonds with Zhdankin's lambda(3)-azidoiodane reagent catalyzed by iron(II)(pybox) complexes is reported. ...The resultant alkyl radical then combines rapidly with a resting state iron(III)-azide comple …
An in-depth study of the mechanism of the azidation of C(sp(3))-H bonds with Zhdankin's lambda(3)-azidoiodane reagent catalyzed by ir …
A radical-mediated multicomponent cascade reaction for the synthesis of azide-biindole derivatives.
Liu X, He K, Gao N, Jiang P, Lin J, Jin Y. Liu X, et al. Chem Commun (Camb). 2021 Sep 23;57(76):9696-9699. doi: 10.1039/d1cc03853b. Chem Commun (Camb). 2021. PMID: 34555141
A radical-mediated, one-pot, multicomponent cascade reaction was developed for the synthesis of azide-biindole derivatives. Mechanistic studies demonstrated that the nitrogen-centred free radical was formed by the reaction of heterocyclic N-H with Cu(II) and PIFA an …
A radical-mediated, one-pot, multicomponent cascade reaction was developed for the synthesis of azide-biindole derivatives. Mechanist …
An azido-bridged [FeII4] grid-like molecule showing spin crossover behaviour.
Guo Z, You M, Deng YF, Liu Q, Meng YS, Pikramenou Z, Zhang YZ. Guo Z, et al. Dalton Trans. 2021 Sep 23. doi: 10.1039/d1dt01908b. Online ahead of print. Dalton Trans. 2021. PMID: 34554167
In this article, the coordination-driven supramolecular assembly based on 3,6-substituted pyridazine and azide is presented to afford two Fe(II) grid-like complexes: [(L)(4)FeII4(N(3))(4)][BPh(4)](4)sol (1, L = 3,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)pyridazine and 2, …
In this article, the coordination-driven supramolecular assembly based on 3,6-substituted pyridazine and azide is presented to afford …
SPAAC iClick: progress towards a bioorthogonal reaction in-corporating metal ions.
Shen YH, Esper AM, Ghiviriga I, Abboud KA, Schanze KS, Ehm C, Veige AS. Shen YH, et al. Dalton Trans. 2021 Sep 21;50(36):12681-12691. doi: 10.1039/d1dt02626g. Dalton Trans. 2021. PMID: 34545891
Experimental and computational insights demonstrate that iClick reactivity of the tested metal azides (LM-N(3), M = Au, W, Re, Ru and Pt) depends on the accessibility of the azide functionality rather than electronic effects imparted by the metal. SPAAC iClic …
Experimental and computational insights demonstrate that iClick reactivity of the tested metal azides (LM-N(3), M = Au, W, Re, …
One-Pot Construction of Indolo[2,3-b]quinoxalines through Ruthenium-Catalyzed Ortho C-H Bond Functionalization of 2-Arylquinoxalines with Sulfonyl Azides.
Laru S, Bhattacharjee S, Ghosh S, Hajra A. Laru S, et al. Org Lett. 2021 Sep 20. doi: 10.1021/acs.orglett.1c02837. Online ahead of print. Org Lett. 2021. PMID: 34543023
The synthesis of N-substituted indolo[2,3-b]quinoxalines has been developed through a Ru(II)-catalyzed ortho C-H functionalization of 2-arylquinoxalines with sulfonyl azides and further oxidation with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in one pot. ...The prel …
The synthesis of N-substituted indolo[2,3-b]quinoxalines has been developed through a Ru(II)-catalyzed ortho C-H functionalization of …
Photocatalytic Hydroaminoalkylation of Styrenes with Unprotected Primary Alkylamines.
Askey HE, Grayson JD, Tibbetts JD, Turner-Dore JC, Holmes JM, Kociok-Kohn G, Wrigley GL, Cresswell AJ. Askey HE, et al. J Am Chem Soc. 2021 Sep 20. doi: 10.1021/jacs.1c07401. Online ahead of print. J Am Chem Soc. 2021. PMID: 34543004
The method is applied to a concise, protecting-group-free synthesis of the blockbuster drug Fingolimod, as well as a phosphonate mimic of its in vivo active form (by iterative alpha-C-H functionalization of ethanolamine). The reaction can also be sequenced with an intramolecular …
The method is applied to a concise, protecting-group-free synthesis of the blockbuster drug Fingolimod, as well as a phosphonate mimic of it …
An Atom-Economic Inverse Solid-Phase Peptide Synthesis Using Bn or BcM Esters of Amino Acids.
Li J, Zhu Y, Liu B, Tang F, Zheng X, Huang W. Li J, et al. Org Lett. 2021 Sep 17. doi: 10.1021/acs.orglett.1c02769. Online ahead of print. Org Lett. 2021. PMID: 34533312
An atom-economic N-to-C-directed solid-phase peptide synthesis is reported that uses benzyl (Bn) or (benzhydryl-carbamoyl)-methyl (BcM) esters of amino acids as the building blocks, which facilitate efficient hydrazinolysis, convenient conversion to acyl azide, and …
An atom-economic N-to-C-directed solid-phase peptide synthesis is reported that uses benzyl (Bn) or (benzhydryl-carbamoyl)-methyl (Bc …
Nucleophile-nucleofuge duality of azide and arylthiolate groups in the synthesis of quinazoline and tetrazoloquinazoline derivatives.
Jeminejs A, Novosjolova I, Bizdēna Ē, Turks M. Jeminejs A, et al. Org Biomol Chem. 2021 Sep 15;19(35):7706-7723. doi: 10.1039/d1ob01315g. Org Biomol Chem. 2021. PMID: 34524320
This, combined with the recently reported arylsulfanyl group dance, provides straightforward access to 4-azido-2-N-, O-, S-substituted quinazolines and/or their tetrazolo tautomers from commercially available 2,4-dichloroquinazoline. ...
This, combined with the recently reported arylsulfanyl group dance, provides straightforward access to 4-azido-2-N-, O-, S-substitute …
Photosensitized Protein Damage by DiethyleneglycoxyP(V)tetrakis(p-n-butoxyphenyl)porphyrin through Electron Transfer: Activity Control through Self-Aggregation and Dissociation.
Hirakawa K, Yoshida M, Hirano T, Nakazaki J, Segawa H. Hirakawa K, et al. Photochem Photobiol. 2021 Sep 13. doi: 10.1111/php.13517. Online ahead of print. Photochem Photobiol. 2021. PMID: 34516009
DiethyleneglycoxyP(V)tetrakis(p-n-butoxyphenyl)porphyrin (EGP(V)TBPP) forms a self-aggregation in an aqueous solution and the photoexcited state of this molecule was effectively deactivated. ...The photosensitized singlet oxygen-generating activity of EGP(V)TBPP was confir …
DiethyleneglycoxyP(V)tetrakis(p-n-butoxyphenyl)porphyrin (EGP(V)TBPP) forms a self-aggregation in an aqueous solution and the photoex …
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