Results 21 to 30 of about 15,108 (284)

Crystal structure of cis-7,8-dihydroxy-5,10,15,20-tetraphenylchlorin and its zinc(II)–ethylenediamine complex

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2022
The title chlorin, 2PhH2, hydrogen-bonded to dimethylaminopyridine (DMAP), C44H32N4O2·C7H10N2, and its corresponding zinc(II) complex, 2PhZn, axially coordinated to ethylenediamine (EDA), [Zn(C44H30N4O2)]·C2H8N2, were isolated and crystallized by ...
Nivedita Chaudhri   +2 more
doaj   +1 more source

Kigelia africana fruit: Constituents, bioactivity, and reflection on composition disparities

open access: yesWorld Journal of Traditional Chinese Medicine, 2017
Objective: Kigelia africana, a tropical tree, which has long been used in African traditional medicine. The objective of the current study has been identifying the constituents of K. africana and verifying its utilities in traditional medicine. Materials
Ahmed Galal Osman   +3 more
doaj   +1 more source

Polysubstituted Benzene Bioisosteres and Beyond: Photochemical Access to Bicyclo[2.1.1]hexanes

open access: yes, 2023
Bicyclo[2.1.1]hexanes are a versatile platform for the exploration of chemical space, with 10 different substituent vectors available. Disubstituted bicyclo[2.1.1]hexanes have been proposed as bioisosteres of ortho- and meta-substituted benzenes, both ...
Marius, Reinhold   +2 more
core   +1 more source

[μ-1,3-Dioxo-1,3-bis(pyridin-2-yl)propane-2,2-diido-κ2N,C2:κ2C2,N′]bis[(1,3-diphenylpropane-1,3-dionato-κ2O,O′)palladium(II)](Pd—Pd)

open access: yesActa Crystallographica Section E, 2011
The title compound, [Pd2(C13H8N2O2)(C15H11O2)2], crystallized from a mixture of ethanol and n-hexanes. The structure is the first example of β-diketonate in a dianionic κ2C-coordination complex containing a PdII—PdII bond ...
Simona Maggini, Peter S. White
doaj   +1 more source

Isolating High Antimicrobial Ability Lignin From Bamboo Kraft Lignin by Organosolv Fractionation

open access: yesFrontiers in Bioengineering and Biotechnology, 2021
Lignin from different biomasses possess biological antioxidation and antimicrobial activities, which depend on the number of functional groups and the molecular weight of lignin.
Jinyan Yun   +9 more
doaj   +1 more source

5-Carboxy-2-azabicyclo[2.1.1]hexanes as Precursors of 5-Halo, Amino, Phenyl, and 2-Methoxycarbonylethyl Methanopyrrolidines

open access: yes, 2016
Novel 5-X-substituted-2-azabicyclo[2.1.1]hexanes (X = 5-syn-Cl, -Br, -I, -Ph, -NHCOOR (R = Me, Bn, t-Bu), -CH2CH2COOMe and X = 5-anti-Br, -I, -Ph) were synthesized from the X = 5-syn-carboxy derivative. New 5-anti-X-2-azabicyclo[2.1.1]hexanes, X = NHCOOR
Grant R. Krow (1266600)   +7 more
core   +3 more sources

Selective Ruthenium-Catalyzed Transformations of Enynes with Diazoalkanes into Alkenylbicyclo[3.1.0]hexanes

open access: yes, 2016
Reaction of a variety of C⋮CH bond-containing 1,6-enynes with N2CHSiMe3 in the presence of RuCl(COD)Cp* as catalyst precursor leads, at room temperature, to the general formation of alkenylbicyclo[3.1.0]hexanes with high Z-stereoselectivity of the ...
Pierre H. Dixneuf (2025436)   +8 more
core   +4 more sources

Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies

open access: yesAdvanced Engineering Materials, EarlyView.
Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo   +3 more
wiley   +1 more source

SPECTRUM AND KINETICS OF DIBROMDIBENZOTIOFEN PHOSPHORESCENCE IN N-HEXANES AT 77 K

open access: yesНаука. Инновации. Технологии, 2022
Spectrum and kinetics of dibromdibenzotiofen phosphorescence in n- hexanes at 77 K have been studied. It has been shown that the visible multiplet structure of phosphorescence spectrum is determined of the superposition of spectra emitted by different ...
Natal’ya Vladimirovna Zhdanova   +1 more
doaj  

Diastereoselective Spiroannulation of Phenolic Substrates: Advances Towards the Asymmetric Formation of the Manumycin m-C7N Core Skeleton

open access: yesMolecules, 2007
The asymmetric syntheses of two new spirolactones prepared in optically pure form from L-3-nitrotyrosine are described. The key step, an oxidative spiroannulation, was carried out on the optically active phenols 11a and 11b and afforded the new ...
Thomas W. Scully   +3 more
doaj   +1 more source

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