AI Article Synopsis
- - The study presents the first asymmetric total synthesis of andranginine using an asymmetric Morita-Baylis-Hillman reaction followed by a diastereoselective intramolecular Diels-Alder reaction.
- - Analysis of the natural andranginine extracted from Kopsia arborea shows it exists as a scalemic mixture.
- - The predominant form found in the natural sample is identified as (16R,21S), rather than the (16S,21R) configuration.
Article Abstract
The first asymmetric total synthesis of andranginine (1) via an asymmetric Morita-Baylis-Hillman reaction and a diastereoselective intramolecular Diels-Alder reaction has revealed that natural andranginine (1) isolated from Kopsia arborea existed as a scalemic mixture and contained predominantly the (16R,21S) form rather than the (16S,21R) form.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.orglett.7b01076 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Constraint of Different Knee Implant Designs Under Anterior-Posterior Shear Forces and Internal-External Rotation Moments in Human Cadaveric Knees.
Bioengineering (Basel)
January 2025
Research & Development, Aesculap AG, 78532 Tuttlingen, Germany.
Instability remains one of the most common indications for revision after total knee arthroplasty. To gain a better understanding of how an implant will perform in vivo and support surgeons in selecting the most appropriate implant design for an individual patient, it is crucial to evaluate the implant constraint within clinically relevant ligament and boundary conditions. Therefore, this study investigated the constraint of three different implant designs (symmetrical implants with and without a post-cam mechanism and an asymmetrical medial-stabilized implant) under anterior-posterior shear forces and internal-external rotation moments at different flexion angles in human cadaveric knees using a six-degrees-of-freedom joint motion simulator.
View Article and Find Full Text PDFEnhanced Antibiotic Release and Mechanical Strength in UHMWPE Antibiotic Blends: The Role of Submicron Gentamicin Sulfate Particles.
J Bone Joint Surg Am
January 2025
Harris Orthopaedics Laboratory, Massachusetts General Hospital, Boston, Massachusetts.
Background: Periprosthetic joint infections (PJIs) are a major complication of total joint replacement surgeries. This study investigated the enhancement of mechanical properties and antibiotic release in ultra-high molecular weight polyethylene (UHMWPE) through the encapsulation of submicron gentamicin sulfate (GS) particles, addressing the critical need for improved implant materials in orthopaedic surgery, particularly in managing PJIs.
Methods: The present study involved embedding submicron GS particles into UHMWPE flakes at concentrations of 2% to 10% by weight.
Interhemispheric paired associative stimulation targeting the bilateral prefrontal cortex of subjects with obesity and food addiction modulates food-related emotional reactivity and associated brain activity.
Appetite
January 2025
Department of Life Science and the Zelman Neuroscience Center, Ben-Gurion University, Beer Sheba, Israel.
Purpose: Behavioral and neurobiological abnormalities in addiction and obesity have led to the theory of food addiction in obesity (FAOB) and brain-behavior association studies. Transcranial magnetic stimulation (TMS) studies and treats various brain disorders. Cortico-cortical paired associative stimulation TMS protocol, in which left lateral prefrontal cortex (LPFC) stimulation follows right LPFC stimulation, can reduce emotional reactivity to visual triggers and modulate prefrontal asymmetry in healthy adults.
View Article and Find Full Text PDFA cross-sectional study on the correlation between internal cerebral vein asymmetry and hemorrhagic transformation following endovascular thrombectomy.
Front Neurol
January 2025
Department of Neurology and Institute of Neurology of First Affiliated Hospital, Institute of Neuroscience, Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, China.
Introduction: Hemorrhagic transformation (HT) is a severe complication in patients with acute ischemic stroke due to large vessel occlusion (AIS-LVO) after endovascular treatment (EVT). We hypothesize that asymmetry of the internal cerebral veins (ICVs) on baseline CT angiogram (CTA) may serve as an adjunctive predictor of HT.
Methods: We conducted a study on consecutive AIS-LVO patients from November 2020 to April 2022.
Comparative analysis of FACT devices for optimal improvement of power quality in unbalanced distribution systems.
Sci Rep
January 2025
Electrical Power and Machines Department, Faculty of Engineering-Tanta University, Tanta, Egypt.
This study examines the performance of asymmetric three-phase distribution systems under the influence of FACT deives such as a static VAR compensator (SVC) and a unified power controller (UPC). Each suggested device's operating principle is developed in this paper in order to provide the best model to be used in the power flow analysis. The performance of the IEEE-13 bus imbalanced distribution model is investigated using the Newton-Raphson method.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!