4a Nucleophilic Aromatic Substitution

MR Crampton - Organic Reaction Mechanisms 2020, 2024 - Wiley Online Library
Analogies between the mechanisms of electrophilic substitution and nucleophilic
substitution have been discussed. Theoretical calculations, involving aromaticity …

Photofunctional Scope of Fluorescent Dithienylethene Conjugates with Aza‐Heteroaromatic Cations

J Chen‐Wu, DB Guzmán‐Ríos, P Remón… - Advanced …, 2023 - Wiley Online Library
A series of dithienylethene (DTE) photoswitches with aza‐heteroaromatic cationic moieties
is synthesized. The switches are characterized regarding their photochemical and …

Synthesis of maleimide-based enediynes with cyclopropane moieties for enhanced cytotoxicity under normoxic and hypoxic conditions

W Wang, H Lu, M Zhang, H Ma, X Cheng… - Journal of Materials …, 2021 - pubs.rsc.org
Myers-Saito cycloaromatization (MSC) is the working mechanism of many natural enediyne
antibiotics with high antitumor potency. However, the presence of the equilibrium between …

A Portable Reagent Inlet System Designed to Diminish the Impact of Air and Water to Ion–Molecule Reactions Studied in a Linear Quadrupole Ion Trap

E Feng, Y Fu, X Ma, RR Kotha, D Ding… - Journal of the …, 2022 - ACS Publications
A portable reagent inlet system for a linear quadrupole ion trap (LQIT) mass spectrometer
was designed to diminish the impact of air and water on gas-phase ion–molecule reactions …

Spin‐Spin Coupling between the Biradical Moieties in Aromatic Tetraradicals Increases their Reactivity

RR Kotha, R Yerabolu, D Ding… - Israel Journal of …, 2023 - Wiley Online Library
The reactivity of a carbon‐centered σ, σ, σ, σ‐type singlet tetraradical containing two meta‐
benzyne moieties, the 2, 4, 5, 7‐tetradehydroquinolinium cation, was examined in the gas …

Light-driven selective aerobic oxidation of (iso) quinoliniums and related heterocycles

M Zhou, K Yu, J Liu, W Shi, Y Pan, H Tang, X Peng… - RSC …, 2021 - pubs.rsc.org
Selective C1–H/C4–H carbonylation of N-methylene iminium salts, catalyzed by visible-light
photoredox and oxygen in the air, has been reported. A ruthenium complex acts as a …

Modification of a Quadrupole/Orbitrap/Linear Quadrupole Ion Trap Tribrid Mass Spectrometer for Diagnostic Gas-Phase Ion–Molecule Reactions

Y Fu, CJ Brown, JT Johnson, BM Marsh… - Journal of the …, 2023 - ACS Publications
Tandem mass spectrometry based on diagnostic gas-phase ion–molecule reactions
represents a robust method for functional group identification in unknown compounds. To …

Spin‐Spin Coupling Controls the Gas‐Phase Reactivity of Aromatic σ‐Type Triradicals

D Ding, E Feng, RR Kotha… - … A European Journal, 2022 - Wiley Online Library
Examination of the reactions of σ‐type quinolinium‐based triradicals with cyclohexane in the
gas phase demonstrated that the radical site that is the least strongly coupled to the other …

Direct amination of nitroquinoline derivatives via nucleophilic displacement of aromatic hydrogen

J Wantulok, D Swoboda, JE Nycz, M Książek, J Kusz… - Molecules, 2021 - mdpi.com
The vicarious nucleophilic substitution of hydrogen (VNS) reaction in electron-deficient
nitroquinolines was studied. Properties of all new products have been characterized by …

ION-MOLECULE REACTIONS STUDIED BY USING DENSITY FUNCTIONAL THEORY CALCULATIONS AND MASS SPECTROMETRY FOR SATURATED …

JR Milton - 2021 - hammer.purdue.edu
The work described herein is related to gas-phase ion-molecule reactions studied by using
mass spectrometry. Chapter 2 describes density functional theory, a method used in …