Chiral primary amine/ketone cooperative catalysis for asymmetric α-hydroxylation with hydrogen peroxide

M Cai, K Xu, Y Li, Z Nie, L Zhang… - Journal of the American …, 2021 - ACS Publications
Carbonyls and amines are yin and yang in organocatalysis as they mutually activate and
transform each other. These intrinsically reacting partners tend to condense with each other …

Nucleophilicity and electrophilicity parameters for predicting absolute rate constants of highly asynchronous 1, 3-dipolar cycloadditions of aryldiazomethanes

H Jangra, Q Chen, E Fuks, I Zenz, P Mayer… - Journal of the …, 2018 - ACS Publications
Kinetics of the reactions of aryldiazomethanes (ArCHN2) with benzhydrylium ions (Ar2CH+)
have been measured photometrically in dichloromethane. The resulting second-order rate …

Visible-light-enhanced ring opening of cycloalkanols enabled by brønsted base-tethered acyloxy radical induced hydrogen atom transfer-electron transfer

R Zhao, Y Yao, D Zhu, D Chang, Y Liu, L Shi - Organic letters, 2018 - ACS Publications
A metal-free ring opening/halogenation of cycloalkanols, which combines both PPO/TBAX
oxidant system and blue LEDs irradiation, is presented. This method produces diverse γ, δ …

Nucleophilicity of glutathione: a link to Michael acceptor reactivities

RJ Mayer, AR Ofial - Angewandte Chemie International Edition, 2019 - Wiley Online Library
Deprotonated glutathione is among the most potent biological nucleophiles and plays an
important physiological role in cellular detoxification by forming covalent conjugates with …

Reactivities of tertiary phosphines towards allenic, acetylenic, and vinylic Michael acceptors

F An, J Brossette, H Jangra, Y Wei, M Shi, H Zipse… - Chemical …, 2024 - pubs.rsc.org
The addition of phosphines (PR3) to Michael acceptors is a key step in many Lewis-base
catalysed reactions. The kinetics of the reactions of ten phosphines with ethyl acrylate, ethyl …

Thioanisole ester based logic gate cascade to control ROS-triggered micellar degradation

I Piergentili, PR Bouwmans, L Reinalda, RW Lewis… - Polymer …, 2022 - pubs.rsc.org
In certain tumor and diseased tissues, reactive oxygen species (ROS), such as H2O2, are
produced in higher concentrations than in healthy cells. Drug delivery and release systems …

Kinetics and mechanism of oxirane formation by Darzens condensation of ketones: quantification of the electrophilicities of ketones

Z Li, H Jangra, Q Chen, P Mayer, AR Ofial… - Journal of the …, 2018 - ACS Publications
The kinetics of epoxide formation by Darzens condensation of aliphatic ketones 1 with
arylsulfonyl-substituted chloromethyl anions 2 (ArSO2CHCl–) have been determined …

Pyrenediones as versatile photocatalysts for oxygenation reactions with in situ generation of hydrogen peroxide under visible light

Y Zhang, X Yang, H Tang, D Liang, J Wu, D Huang - Green Chemistry, 2020 - pubs.rsc.org
Pyrenediones (PYDs) are efficient photocatalysts for three oxygenation reactions:
epoxidation of electron deficient olefins, oxidative hydroxylation of organoborons, and …

Inherent Reactivity of Spiro‐Activated Electrophilic Cyclopropanes

PM Jüstel, A Stan, CD Pignot… - Chemistry–A European …, 2021 - Wiley Online Library
The kinetics of the ring‐opening reactions of thiophenolates with geminal bis (acceptor)‐
substituted cyclopropanes in DMSO at 20° C was monitored by photometric methods. The …

Hypervalent iodine (III)-catalyzed epoxidation of β-cyanostyrenes

SR Mangaonkar, FV Singh - Synthesis, 2019 - thieme-connect.com
A convenient approach for the synthesis of β-cyanoepoxides is illustrated by iodine (III)-
catalyzed epoxidation of electron-deficient β-cyanostyrenes, wherein the active catalytic …