Results 31 to 40 of about 5,195 (203)

Unveiling the Stereoselectivity and Regioselectivity of the [3+2] Cycloaddition Reaction between N-methyl-C-4-methylphenyl-nitrone and 2-Propynamide from a MEDT Perspective [PDF]

open access: goldInternational Journal of Molecular Sciences, 2023
[3+2] cycloaddition reactions play a crucial role in synthesizing complex organic molecules and have significant applications in drug discovery and materials science. In this study, the [3+2] cycloaddition (32CA) reactions of N-methyl-C-4-methyl phenyl-nitrone 1 and 2-propynamide 2, which have not been extensively studied before, were investigated ...
Sabir A. Mohammed Salih   +3 more
openalex   +4 more sources

Possibility of Enlargement in Left Medial Temporal Areas Against Cerebral Amyloid Deposition Observed During Preclinical Stage

open access: yesFrontiers in Aging Neuroscience, 2022
Neurodegenerative changes in the preclinical stage of Alzheimer’s disease (AD) have recently been the focus of attention because they may present a range of treatment opportunities.
Etsuko Imabayashi   +12 more
doaj   +1 more source

Enhancing Deep Learning-Based Subabdominal MR Image Segmentation During Rectal Cancer Treatment: Exploiting Multiscale Feature Pyramid Network and Bidirectional Cross-Attention Mechanism. [PDF]

open access: yesInt J Biomed Imaging
Background: This study is aimed at solving the misalignment and semantic gap caused by multiple convolutional and pooling operations in U‐Net while segmenting subabdominal MR images during rectal cancer treatment. Methods: We propose a new approach for MR Image Segmentation based on a multiscale feature pyramid network and a bidirectional cross ...
Xiao Y, Yang X, Huang S, Guo L.
europepmc   +2 more sources

Understanding the different reactivity of (Z)- and (E)-β-nitrostyrenes in [3+2] cycloaddition reactions. An MEDT study

open access: goldRSC Advances, 2021
The different reactivity and selectivities of isomeric E/Z β-nitrostyrenes in polar zw-type [3+2] cycloaddition reactions is explained within MEDT.
Mar Ríos‐Gutiérrez   +2 more
openalex   +4 more sources

Endovascular Therapy Versus Medical Therapy Alone for Basilar Artery Stroke: A Systematic Review and Meta‐Analysis Through Nested Knowledge

open access: yesStroke: Vascular and Interventional Neurology, 2022
Background Endovascular thrombectomy (EVT) is an effective treatment for acute ischemic stroke attributable to the anterior circulation large‐vessel occlusion.
Gautam Adusumilli   +10 more
doaj   +1 more source

Insights into the mechanism, selectivity, and substituent effects in the Diels-Alder reaction of azatrienes with electron-rich dienophiles: An MEDT study [PDF]

open access: greenJournal of Molecular Graphics and Modelling
accepted in Journal of Molecular Graphics and ...
Amine Rafik   +5 more
openalex   +4 more sources

Unveiling the Chemo‐ and Regioselectivity of the [3+2] Cycloaddition Reaction between 4‐Chlorobenzonitrile Oxide and β‐Aminocinnamonitrile with a MEDT Perspective** [PDF]

open access: hybridChemistrySelect, 2021
Abstract A molecular electron density theory (MEDT) study for the [3+2] cycloaddition (32CA) reaction of 4‐chlorobenzonitrile oxide (CBNO) and β‐aminocinnamonitrile (ACN) has been performed at the MPWB1K/6‐311G(d,p) computational level. This 32CA reaction, characterised as the zwitterionic type (
Luís R. Domingo, Nivedita Acharjee
openalex   +2 more sources

Unveiling the Unexpected Reactivity of Electrophilic Diazoalkanes in [3+2] Cycloaddition Reactions within Molecular Electron Density Theory

open access: yesChemistry, 2021
The [3+2] cycloaddition (32CA) reactions of strongly nucleophilic norbornadiene (NBD), with simplest diazoalkane (DAA) and three DAAs of increased electrophilicity, have been studied within the Molecular Electron Density Theory (MEDT) at the MPWB1K/6 ...
Luis R. Domingo   +2 more
doaj   +1 more source

An MEDT study of Diels-Alder reactions of a tetrahydroazulenone with maleimides: Mechanism, selectivity, and antimicrobial insights

open access: diamondCurrent Chemistry Letters
The Diels-Alder cycloaddition of cyclopentadienone derivative 3-methyl-5,6,7,8-tetrahydroazulen-1(4H)-one with a series of maleimide derivatives is studied using Molecular Electron Density Theory at the B3LYP/6-311++G(d,p) computational level. Conceptual Density Functional Theory analysis predicts low reaction polarity, which is confirmed by global ...
Abdeljabbar Jaddi   +5 more
openalex   +2 more sources

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