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Stereocontrolled synthesis and nuclear magnetic resonance analysis of boranophosphate/phosphate chimeric oligonucleotides [PDF]

open access: yesRoyal Society Open Science
This report describes the stereoselective synthesis of boranophosphate/phosphate (PB/PO) chimeric oligodeoxynucleotides (ODNs) and the nuclear magnetic resonance (NMR) analysis of oligomers containing PB linkages.
Kiyoshi Kakuta   +4 more
doaj   +2 more sources

Preparation of spirocyclic oxindoles by cyclisation of an oxime to a nitrone and dipolar cycloaddition [PDF]

open access: yesBeilstein Journal of Organic Chemistry
Oxindoles are an important class of compounds with significant biological activities. Spirocyclic derivatives are present in a variety of natural products.
Beth L. Ritchie   +2 more
doaj   +2 more sources

Stereochemistry of N-Acyl-5H-dibenzo[b,d]azepin-7(6H)-ones

open access: yesMolecules, 2023
The stereochemical properties of N-acyl-5H-dibenzo[b,d]azepin-7(6H)-ones (2a–c), which inhibit potassium channels in T cells, were examined by freezing their conformational change due to 4-methyl substitution.
Arisa Chiba   +8 more
doaj   +1 more source

Synthesis of New C-3 Substituted Kynurenic Acid Derivatives

open access: yesMolecules, 2020
The application of kynurenic acid (KYNA) as an electron-rich aromatic system in the modified Mannich reaction has been examined. The extension possibility of the reaction was tested by using amines occurring in a number of bioactive products, such as ...
Bálint Lőrinczi   +3 more
doaj   +1 more source

Fast and Accurate Prediction of Refractive Index of Organic Liquids with Graph Machines

open access: yesMolecules, 2023
The refractive index (RI) of liquids is a key physical property of molecular compounds and materials. In addition to its ubiquitous role in physics, it is also exploited to impart specific optical properties (transparency, opacity, and gloss) to ...
François Duprat   +3 more
doaj   +1 more source

Chemistry, Cyclophosphamide, Cancer Chemotherapy, and Serendipity: Sixty Years On

open access: yesSubstantia, 2021
Cambridge Dictionary: serendipity | noun | the phenomenon of finding interesting or valuable things by chance. The year 2019 marked the 60th anniversary of the approval of cyclophosphamide (CP) as an anticancer by the U.S.
Gerald Zon
doaj   +1 more source

Advancing peptide siRNA-carrier designs through L/D-amino acid stereochemical modifications to enhance gene silencing

open access: yesMolecular Therapy: Nucleic Acids, 2021
The 599 peptide has been previously shown to effectively deliver small interfering RNAs (siRNAs) to cancer cells, inducing targeted-oncogene silencing, with a consequent inhibition of tumor growth. Although effective, this study was undertaken to advance
Charles E. Holjencin   +10 more
doaj   +1 more source

Synthesis and Conformational Analysis of Naphthoxazine-Fused Phenanthrene Derivatives

open access: yesMolecules, 2020
The synthesis of new phenanthr[9,10-e][1,3]oxazines was achieved by the direct coupling of 9-phenanthrol with cyclic imines in the modified aza-Friedel–Crafts reaction followed by the ring closure of the resulting bifunctional aminophenanthrols with ...
Khadija Belasri   +6 more
doaj   +1 more source

Solvent-Free C-3 Coupling of Azaindoles with Cyclic Imines

open access: yesMolecules, 2019
By direct coupling 7-azaindole and cyclic imines, such as 3,4-dihydroisoquinoline, 6,7-dihydrothieno[3,2-c]pyridine, 3,4-dihydro-β-carboline, and 4,5-dihydro-3H-benz[c]azepine, new 3-substituted 7-azaindole derivatives have been synthesized.
Khadija Belasri   +2 more
doaj   +1 more source

X-ray Diffraction, Electronic Circular Dichroism, and Quantum Mechanics (TD-DFT) Investigations on 4 Dehydroxyaltersolanol A, a Secondary Metabolite from Endophytic Fungus Nigrospora oryzae [PDF]

open access: yesResearch Journal of Pharmacognosy
Background and objectives: A tetrahydro anthraquinone derivative, 4-dehydroxyaltersolanol A, has been obtained from Nigrospora oryzae, which was isolated from Uncaria borneensis Havil as an endophytic fungus.
Fatimah Bebe Mohamed Hussain   +8 more
doaj   +1 more source

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