Results 131 to 140 of about 48,446 (261)

NiH‐Catalyzed Enantioconvergent α‐Alkenylation of Carbonyl Compounds via Markovnikov Alkyne Hydronickellation

Angewandte Chemie, Volume 138, Issue 17, 20 April 2026.
A NiH‐catalyzed α‐alkenylation via Markovnikov hydronickellation of alkynes enables convenient access to α‐chrial β‐methylene carbonyl frameworks that are prevalent in biorelevant molecules. High regio‐ and enantioselectivities have been achieved with excellent functional group tolerance and applicability toward complex structures. The β‐methylene unit
Hyeontaek Nam, Seji Jang, Dongwook Kim, Sangwon Seo   +3 more
wiley   +2 more sources

Kinetic and thermodynamic analysis of hemp oil epoxidation with density functional theory insights into unsaturated fatty acid epoxidation and ring-opening reactions

Chemical Engineering Journal Advances
This study investigates the kinetic and thermodynamic aspects of hemp oil epoxidation, using an ion exchange resin catalyst for in-situ peracid generation.
Elham Nadim, Pavan Paraskar, Hiresh Moradi, Mohammadnabi Hesabi, Yuansong Qiao, Emma J. Murphy, Ian Major   +6 more
doaj   +1 more source

Enzyme-catalyzed cationic epoxide rearrangements in quinolone alkaloid biosynthesis. [PDF]

, 2017
Epoxides are highly useful synthons and biosynthons for the construction of complex natural products during total synthesis and biosynthesis, respectively.
Garcia-Borràs, Marc, Hirayama, Yuichiro, Houk, KN, Li, Dehai H, Li, Li, Tang, Mancheng C, Tang, Yi, Watanabe, Kenji, Zou, Yi   +8 more
core  

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, Volume 64, Issue 9, Page 1860-1894, 1 May 2026.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

Enhanced Wind Linked to Ozone Depletion Influences Photoprotective Responses in Antarctic Mosses via Water Stress

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 5, May 2026.
Abstract Climate change, including ozone depletion, has altered wind regimes around Antarctica in recent decades, intensifying environmental stress on coastal moss communities. However, the physiological impacts of wind on mosses remain poorly understood. This study explored the potential climatic drivers of wind speed (WS) changes and investigated the
Yifan Wu, Hao Yin, Krystal L. Randall, Melinda J. Waterman, Johanna D. Turnbull, Sharon A. Robinson   +5 more
wiley   +1 more source

Catalytic site design: Impact of elongated bridges in open chain iron-NHC complexes on homogeneous epoxidation catalysisCCDC

Results in Chemistry
To elucidate the relationship between ligand flexibility, coordination geometry and catalytic performance in homogeneous epoxidation catalysis, a series of four diacetonitrile[bis(o-imidazol-2-ylidenepyridine)alkane]iron(II) hexafluorophosphate complexes
Carla A. Esslinger, Stefan G. Latzel, Melanie E. Hoffmann, Robert M. Reich, Fritz E. Kühn   +4 more
doaj   +1 more source

Enzymatic one-step ring contraction for quinolone biosynthesis. [PDF]

, 2018
The 6,6-quinolone scaffolds on which viridicatin-type fungal alkaloids are built are frequently found in metabolites that display useful biological activities.
Champagne, Pier Alexandre, Hara, Kodai, Hashimoto, Hiroshi, Hirayama, Yuichiro, Houk, Kendall N, Kishimoto, Shinji, Tang, Yi, Watanabe, Kenji   +7 more
core  

Speciation, Structural Refinement, and Distribution of Ti Sites in Titanium Silicalite‐1 From 47/49Ti NMR Crystallography at 28.2 Tesla

Angewandte Chemie, Volume 138, Issue 15, 6 April 2026.
Titanium silicalite‐1 (TS‐1), used in industrial selective oxidation processes, depends on specific, yet still unresolved Ti sites, dispersed within the framework of an MFI‐zeolite. Applying high field (28.2 T) 47/49Ti NMR and 17O NMR spectroscopy for an array of TS‐1 catalysts enables the development of an NMR crystallography protocol and the ...
Christoph J. Kaul, Jonas Koppe, Lukas Lätsch, Michael Wörle, Sadig Aghazada, Jacob B. Holmes, Christina Wartmann, Mingji Zheng, Albrecht Berkessel, Trees De Baerdemaeker, Andrei‐Nicolae Parvulescu, Karsten Seidel, J. Henrique Teles, Alexander V. Yakimov, Christophe Copéret   +14 more
wiley   +2 more sources

Phospholipid Profiling Established by Structure‐Rich Fragments for Molecular Species Level Shotgun Analysis

Rapid Communications in Mass Spectrometry, Volume 40, Issue 8, 30 April 2026.
ABSTRACT Rationale Accurate identification of phospholipid molecular species remains a major challenge in shotgun lipidomics because conventional tandem mass spectrometry typically resolves only one structural moiety at a time. This structural ambiguity limits confident lipid biomarker discovery and biological interpretation.
Rong Chen, Amber H. Jannasch, Bruce R. Cooper, Jonathan H. Shannahan, Christina R. Ferreira   +4 more
wiley   +1 more source

Back to the Electrofuture: Named Reactions Powered by Electroorganic Syntheses

ChemSusChem, Volume 19, Issue 7, 14 April 2026.
Bridging classical named reactions with modern electroorganic chemistry, this review presents how electrochemical strategies can revive and reinterpret historically significant transformations, highlighting their emerging potential as sustainable alternatives in contemporary organic synthesis.
Debajit Maiti, Yoonji Heo, Geon Kang, Min Kim, Isaac Choi   +4 more
wiley   +1 more source