We report here an enantioselective formal synthesis of vinigrol involving a 1-2-3 strategy: one pot and two reactions with the formation of three rings leading to the core structure of vinigrol from its stereochemically well-defined acyclic precursor.
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Org Lett
January 2025
School of Pharmacy, Anhui Medical University, Hefei 230032, China.
Talaromeroterpenoids A-G (-), seven new 3,5-dimethylorsellinic-acid-derived meroterpenoids, and two known analogues ( and ) were isolated from the mangrove endophytic fungus sp. JNQQJ-4 by genome analysis and a molecular networking strategy. Their structures and absolute configurations were established by nuclear magnetic resonance data, high-resolution electrospray ionization mass spectrometry, and X-ray diffraction.
View Article and Find Full Text PDFCurr Pharm Des
January 2025
Department of Pharmaceutics, College of Pharmacy, Shaqra University, Shaqra 11961, Kingdom of Saudi Arabia.
Nanogels (NGs) are presently the focus of extensive research because of their special qualities, including minimal particle size, excellent encapsulating efficacy, and minimizing the breakdown of active compounds. As a result, NGs are great candidates for drug delivery systems. Cross-linked nanoparticles (NPs) called stimulus-responsive NGs are comprised of synthetic, natural, or a combination of natural and synthetic polymers.
View Article and Find Full Text PDFVienna Yearb Popul Res
September 2024
University of Minnesota, Minneapolis, Minnesota, USA.
Climate change is among the most urgent challenges of our time. While often considered a problem for the natural and physical sciences, the humanities and social sciences have made equally important interventions into research on the reciprocal relationship between humans and our climate. Because demography occupies the intersection of the natural and social sciences, and because it deals specifically with rates of change in social and natural processes, we believe it can make valuable contributions to the pressing imperatives of understanding and addressing climate change and mitigating the harms it is already visiting on the world's most vulnerable people.
View Article and Find Full Text PDFJACS Au
January 2025
UCIBIO-Applied Molecular Biosciences Unit, Department of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal.
The mucin -glycan sialyl Tn antigen (sTn, Neu5Acα2-6GalNAcα1--Ser/Thr) is an antigen associated with different types of cancers, often linked with a higher risk of metastasis and poor prognosis. Despite efforts to develop anti-sTn antibodies with high specificity for diagnostics and immunotherapy, challenges in eliciting high-affinity antibodies for glycan structures have limited their effectiveness, leading to low titers and short protection durations. Experimental structural insights into anti-sTn antibody specificity are lacking, hindering their optimization for cancer cell recognition.
View Article and Find Full Text PDFJACS Au
January 2025
Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy.
Naturally occurring photoenzymes are rare in nature, but among them, fatty acid photodecarboxylases derived from (FAPs) have emerged as promising photobiocatalysts capable of performing the redox-neutral, light-induced decarboxylation of free fatty acids (FAs) into C1-shortened alka(e)nes. Using a hybrid QM/MM approach combined with a polarizable embedding scheme, we identify the structural changes of the active site and determine the energetic landscape of the forward electron transfer (fET) from the FA substrate to the excited flavin adenine dinucleotide. We obtain a charge-transfer diradical structure where a water molecule rearranges spontaneously to form a H-bond interaction with the excited flavin, while the FA's carboxylate group twists and migrates away from it.
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