The primary amino group has been seldom utilized as a transformable functionality in organic synthesis. Reported herein is a deaminative halogenation of primary amines using -anomeric amide as the nitrogen-deletion reagent. Both aliphatic and aromatic amines are competent substrates for direct halogenations. The mildness and robustness of the protocol are evidenced by the successful reactions of several complex- and functional group-enriched bioactive compounds or drugs. Elaboration of the resulting products provides interesting analogues of drug molecules.
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http://dx.doi.org/10.1016/j.isci.2023.106255 | DOI Listing |
Cells
January 2025
Laboratory of Food and Physiological Sciences, Department of Life and Food Sciences, School of Life and Environmental Sciences, Azabu University, 1-17-71, Fuchinobe, Chuo-ku, Sagamihara 252-5201, Kanagawa, Japan.
While the impact of (-)-epigallocatechin-3-gallate (EGCG) on modulating nociceptive secondary neuron activity has been documented, it is still unknown how EGCG affects the excitability of nociceptive primary neurons in vivo. The objective of the current study was to investigate whether administering EGCG locally in rats reduces the excitability of nociceptive primary trigeminal ganglion (TG) neurons in response to mechanical stimulation in vivo. In anesthetized rats, TG neuronal extracellular single unit recordings were made in response to both non-noxious and noxious mechanical stimuli.
View Article and Find Full Text PDFEur J Neurol
January 2025
Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Background: Catechol-O-methyl transferase (COMT) inhibitors are routinely used to manage motor fluctuations in Parkinson's disease (PD). We assessed the effect of opicapone on motor symptom severity in levodopa-treated patients without motor complications.
Methods: This was a randomized, double-blind, 24-week, placebo-controlled study of opicapone 50 mg as adjunct to levodopa (NCT04978597).
Allergol Immunopathol (Madr)
January 2025
Division of Allergy and Clinical Immunology, Federal University of São Paulo (UNIFESP), São Paulo, Brazil.
This study aimed to characterize the profile of probable anaphylaxis cases treated at a private pediatric hospital emergency department in São Paulo. It investigated triggering factors, the presence of cofactors, treatments administered, and follow-up for these cases through interviews with the patients' families. A single-center cross-sectional study analyzed medical records of children and adolescents treated between 2016 and 2020.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Erasmus University Medical Center, Rotterdam, Netherlands.
Background: Validating the predictive value of plasma markers for Alzheimer's disease, cerebrovascular disease and cognitive dysfunction in older adults representative of primary care settings, is needed to guide prevention and treatment decisions.
Method: At baseline, single molecule array plasma measures of Aβ42/40, pTau217, pTau181, GFAP and NfL were collected from 625 dementia-free participants from the population-based Rotterdam Study (mean age 63 years [range 54-84], 51% women). After a mean follow-up time of seven years [range 5-9], participants underwent amyloid F-florbetaben PET, brain MRI, and cognitive assessment.
Alzheimers Dement
December 2024
Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
Background: Glymphatic clearance dysfunction within the perivascular space has been implicated in Alzheimer's Disease (AD) pathology. Diffusion MRI-based techniques such as DTI-ALPS can quantify perivascular interstitial fluid (ISF) dynamics, yet their links with other early AD markers in the cognitively normal elderly population remain underexplored. Here, we investigated associations between DTI-ALPS and cerebral β-amyloid (Aβ) burden measured with Pittsburgh Compound B (PiB)-PET.
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