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Neutral 4π-electron tetrasilacyclobutadiene contains unusual features of a Möbius-type aromatic ring.
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Anorganische Chemie, Universität Göttingen, Göttingen, Germany.
The search for stable compounds containing an antiaromatic cyclic 4π system is a challenge for inventive chemists that can look back on a long history. Here we report the isolation and characterization of the novel 4π-electron tetrasilacyclobutadiene, an analogue of a 4π neutral cyclobutadiene that exhibits surprising features of a Möbius-type aromatic ring. Reduction of RSiCl (R = (Pr)PCH) with KC in the presence of cycloalkyl amino-carbene (cAAC) led to the formation of corresponding silylene 1.
View Article and Find Full Text PDFHydroxyethylamine based analog targets microtubule assembly: an in silico study for anti-cancerous drug development.
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Department of Biotechnology, Mahatma Gandhi Central University, Motihari, 845401, India.
Microtubules are dynamic cytoskeletal structures essential for cell architecture, cellular transport, cell motility, and cell division. Due to their dynamic nature, known as dynamic instability, microtubules can spontaneously switch between phases of growth and shortening. Disruptions in microtubule functions have been implicated in several diseases, including cancer, neurodegenerative disorders such as Alzheimer's and Parkinson's disease, and birth defects.
View Article and Find Full Text PDFA new diminutive species of bohaiornithid enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Group, northern China.
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Negaunee Integrative Research Center, Field Museum, 1400 S. Dusable Lake Shore Drive, Chicago, IL, 60605, USA.
Enantiornithes are the most successful early-diverging avian clade, their fossils revealing important information regarding the structure of Cretaceous avifaunas and the parallel refinement of flight alongside the ornithuromorph lineage that includes modern birds. The most diverse recognized family of Early Cretaceous enantiornithines is the Bohaiornithidae, known from the Jehol Biota in northeastern China. Members of this clade enhance our understanding of intraclade morphological diversity and elucidate the independent evolution of this unique lineage.
View Article and Find Full Text PDFHybridisation of in silico and in vitro bioassays for studying the activation of Nrf2 by natural compounds.
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University of Health Sciences, Vietnam National University Ho Chi Minh City, YA1 Administrative Building, Hai Thuong Lan Ong Street, Dong Hoa Ward, Di An City, Binh Duong Province, 75308, Vietnam.
Oxidative stress, characterized by the damaging accumulation of free radicals, is associated with various diseases, including cardiovascular, neurodegenerative, and metabolic disorders. The transcription factor Nrf2 is pivotal in cellular defense against oxidative stress by regulating genes that detoxify free radicals, thus maintaining redox homeostasis and preventing cellular aging. Keap1 plays a regulatory role through its interaction with Nrf2, ensuring Nrf2 degradation under homeostatic conditions and facilitating its stabilization and nuclear translocation during oxidative stress.
View Article and Find Full Text PDFA Review on zerumbone and its semisynthetic Analogs: Synthesis and Implications in Medicinal chemistry.
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Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India. Electronic address:
Natural products and their semisynthetic analogs have long standing history in generating and identifying lead and drug candidates for various therapeutic areas. Zerumbone 1, a unique 11 membered monocyclic sesquiterpene natural product is isolated from Zingiber zerumbet (L. Smith) and related species.
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