Synthetically combining the C-4' side-chain structural features of the antiviral candidates 5'-methylaristeromycin and 5'-homoaristeromycin into a diastereomeric pair of C-4' side-chain dihydroxylated aristeromycins (6 and 7) is reported. Broad antiviral analyses of the both targets found promising effects towards HBV (6, 6.7 μM and 7, 7.74 μM) and HCMV (only 7, 0.72 μM). No other activity was found. Neither of the diastereomers was cytotoxic in the assays performed.
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http://dx.doi.org/10.1016/j.bmcl.2018.03.088 | DOI Listing |
Molecules
September 2024
PolyCrystalLine SPA, Via Della Cooperazione 29, 40059 Medicina, Italy.
In this work, naphthalenediimide (NDI) derivatives are widely studied for their semiconducting properties and the influence of the side-chain length on the crystal packing is reported, along with the thermal properties of three core-chlorinated NDIs with different fluoroalkyl side-chain lengths (CF-NDI, CF-NDI and CF-NDI). The introduction of fluorinated substituents at the imide nitrogen and addition of strong electron-withdrawing groups at the NDI core are used to improve the NDI derivatives air stability. The new compound, CF-NDI, was deeply analyzed and compared to the well-known CF-NDI and CF-NDI, leading to the discovery and solution of two different crystal phases, form α and solvate form, and a solid solution of CF-NDI and CF-NDI-OH, formed by the decomposition in DMSO.
View Article and Find Full Text PDFPolymers (Basel)
June 2024
Advanced Rheology Institute, Department of Polymer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
The viscosity and viscoelasticity of polyelectrolyte solutions with a single electrostatic interaction have been carefully studied experimentally and theoretically. Despite some theoretical models describe experimental results well, the influence of multiple interactions (electrostatic and hydrophobic) on rheological scaling is not yet fully resolved. Herein, we systematically study the microstructures and rheological properties of short-side-chain perfluorosulfonic acid (S-PFSA), the most promising candidate of a proton exchange membrane composed of a hydrophobic backbone with hydrophilic side-chains, in water/2-propanol.
View Article and Find Full Text PDFOrg Lett
July 2024
BioCIS, Faculté de Pharmacie, Université Paris-Saclay, CNRS, 91400 Orsay France.
Plakortides make up a subclass of marine endoperoxides with diverse biological activities. Their structural particularity is derived from the C and C positions of the endoperoxide, which are substituted by ethyl groups. The ethyl plakortide Z has the simplest side chain among its congeners and is an excellent target for testing a universal strategy for the synthesis of this subfamily.
View Article and Find Full Text PDFSci Total Environ
August 2024
Faculty of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
Tightening of environmental regulations against long-chain perfluoroalkyl acids (PFAAs) since the 2000s may have led to significant increases in the occurrence of short-chain PFAAs in the environment. Understanding the impact of the regulations on composition of durable water repellents (DWRs) is imperative to guide implementation of pragmatic actions during their use and end-of-life treatment. Substantial decreases in the frequencies of detection and concentrations of long-chain PFAAs and long-chain PFAA-precursors, and substantial increases in those of short-chain PFAAs and short-chain PFAA-precursors, have been observed in the impurities and hydrolysis products of side-chain fluorinated polymers (SCFPs).
View Article and Find Full Text PDFInt J Biol Macromol
June 2024
Shaanxi Key Laboratory of Natural Products & Chemical Biology, School of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China. Electronic address:
A lipidated polysaccharide, HDPS-2II, was isolated from the dried larva of Holotrichia diomphalia, which is used in traditional Chinese medicine. The molecular weight of HDPS-2II was 5.9 kDa, which contained a polysaccharide backbone of →4)-β-Manp-(1 → 4,6)-β-Manp-(1 → [6)-α-Glcp-(1] → 6)-α-Glcp→ with the side chain α-Glcp-(6 → 1)-α-Glcp-(6 → linked to the C-4 of β-1,4,6-Manp and four types of lipid chains including 4-(4-methyl-2-(methylamino)pentanamido)pentanoic acid, 5-(3-(tert-butyl)phenoxy)hexan-2-ol, N-(3-methyl-5-oxopentan-2-yl)palmitamide, and N-(5-amino-3-methyl-5-oxopentan-2-yl)stearamide.
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