Intramolecular Büchner reaction of 1-diazo-5-phenylpentan-2-ones followed by oxidation with SeO or O in the presence of silica gel regioselectively gave 8-formyl-1-tetralones or one-carbon-lacking 1-tetralones, respectively.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1248/cpb.c19-00243 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Characterization of the N- and C-terminal domain interface of the three main apoE isoforms: A combined quantitative cross-linking mass spectrometry and molecular modeling study.
Biochim Biophys Acta Gen Subj
January 2025
Center for Structural Biology and Bioinformatics, Université Libre de Bruxelles (ULB), Brussels, Belgium.
Apolipoprotein E (apoE) polymorphism is associated with different pathologies such as atherosclerosis and Alzheimer's disease. Knowledge of the three-dimensional structure of apoE and isoform-specific structural differences are prerequisites for the rational design of small molecule structure modulators that correct the detrimental effects of pathological isoforms. In this study, cross-linking mass spectrometry (XL-MS) targeting Asp, Glu and Lys residues was used to explore the intramolecular interactions in the E2, E3 and E4 isoforms of apoE.
View Article and Find Full Text PDFExploring the effect of Zr/B ratio on the stability and reactivity of activated ε-caprolactone complexes: A DFT, QTAIM and NCI study.
J Mol Graph Model
January 2025
Unit of Excellence in Computational Molecular Science and Catalysis, and Division of Chemistry, School of Science, University of Phayao, Phayao, 56000, Thailand. Electronic address:
Monomer insertion, leading to the formation of an activated monomer complex, is a critical step in cationic ring-opening polymerization (CROP) of cyclic monomers, such as ε-caprolactone (CL). In this study, Density Functional Theory (DFT) calculations were employed to investigate the structural and electronic properties of four activated complexes at two Zr:B ratios (1:2 and 1:1), where Zr is the cationic zirconocene catalyst, Cp₂ZrMe⁺, and B is the borate cocatalyst, [MeB(CF)] or [B(CF)]. Steric hindrance at the reactive site was analyzed using topographic steric maps, while inter- and intramolecular interactions of the complex systems were examined through the Quantum Theory of Atoms in Molecules (QTAIM) and non-covalent interaction (NCI) analyses.
View Article and Find Full Text PDFRuthenium-Catalyzed Intramolecular Allene-alkyne Cascade Cyclization: Access to the Sulfone-cyclopenta[]naphthalene Core.
Org Lett
January 2025
Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India.
A ruthenium-catalyzed intramolecular cascade cyclization of allene-alkyne has been achieved. This method offers a streamlined and atom-economical approach for the construction of sulfone bearing 1-cyclopenta[]naphthalenes, an important structural scaffold that exists in biologically active compounds. Our approach, backed by mechanistic insights from deuterium labeling, DFT calculations, and potential for reaction scale-up, presents synthetic chemists with an invaluable tool for efficiently producing a distinct carbon framework in a one-pot manner.
View Article and Find Full Text PDFA protocol for the investigation of the intramolecular vibrational energy redistribution problem: the isomerization of nitrous acid as a case of study.
Phys Chem Chem Phys
January 2025
Institute of Chemistry, Department of Fundamental Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748 - Butantã, São Paulo, 05508-900, Brazil.
The conformational isomerization of nitrous acid (HONO) promoted by excitation of the or stretching normal coordinates is the first observed case of an infrared-induced photochemical reaction. The energy captured by the excited normal modes is redistributed into a highly excited vibrational level of the torsion normal coordinate, which is the isomerization reaction coordinate. Herein, we present simple numerical methods to qualitatively investigate the coupling between the normal coordinates and the possible gateways for vibrational energy redistribution leading to the isomerization process.
View Article and Find Full Text PDFPrecise photorelease in living cells by high-viscosity activatable coumarin-based photocages.
Chem Sci
January 2025
School of Biomedical Engineering, Shanghai Jiao Tong University Shanghai 200240 China
Intracellular viscosity is a critical microenvironmental factor in various biological systems, and its abnormal increase is closely linked to the progression of many diseases. Therefore, precisely controlling the release of bioactive molecules in high-viscosity regions is vital for understanding disease mechanisms and advancing their diagnosis and treatment. However, viscosity alone cannot directly trigger chemical reactions.
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!