Results 71 to 80 of about 29,601 (261)

The quantum chemical study of the mechanism of the epoxidation reaction of limonene and geraniol with peracetic and perbenzoic acids

Журнал органічної та фармацевтичної хімії, 2019
Aim. To compare the mechanism of the epoxidation reaction of terpenes Geraniol and Limonene with peracetic acid and perbenzoic acid based on the quantum chemical study. Materials and methods.
O. M. Agafonov, S. I. Okovytyy, M. Ye. Blazheyevskiy   +2 more
doaj   +1 more source

Chemoenzymatic Epoxidation of Alkenes and Reusability Study of the Phenylacetic Acid

The Scientific World Journal, 2014
Here, we focused on a simple enzymatic epoxidation of alkenes using lipase and phenylacetic acid. The immobilised Candida antarctica lipase B, Novozym 435 was used to catalyse the formation of peroxy acid instantly from hydrogen peroxide (H2O2) and ...
Emilia Abdulmalek, Mahashanon Arumugam, Hanis Nabillah Mizan, Mohd. Basyaruddin Abdul Rahman, Mahiran Basri, Abu Bakar Salleh   +5 more
doaj   +1 more source

Covalent Insertion of a Mn(Salen) Type Complex in Cross-Linked Protein Crystals: Design of an Enantioselective Artificial Epoxidase. [PDF]

Chemistry
An Artificial metalloenzyme was designed by a Michael addition between a MnSalen complex and a cysteine residue within NikA crystals. The heterogeneous catalyst was found capable of an enantioselective and stereospecific epoxidation of cis‐β‐methylstyrene in cristallo.
Boukhallat M, Benhamed I, Arnone J, Van Baaren S, Rinaldi C, Catty P, Marchi-Delapierre C, Cavazza C, Ménage S.   +8 more
europepmc   +2 more sources

Stable copper nanoparticle photocatalysts for selective epoxidation of alkenes with visible light

, 2017
Selective epoxidation of various alkenes with molecular oxygen (O2) under mild conditions is a longstanding challenge in achieving syntheses of epoxides. Cu-based catalysts have been found to be catalytically active for selective epoxidations.
Liu, Zhe, Steven Bottle, Yiming Huang, Guoping Gao, Gang Xiao, Zhe Liu, Aijun Du, Sarina Sarina, Gao, Guoping, Xiao, Gang, Huang, Yiming, Huaiyong Zhu, Sarina, Sarina, Bottle, Steven, Zhu, Huaiyong, Du, Aijun   +15 more
core   +1 more source

Synthesis and Activity‐Based Protein Profiling Identifies Aldo‐Keto Reductase 1C3 as Target Protein of Myxoglucamides

Angewandte Chemie International Edition, EarlyView.
Myxoglucamide A—a novel glycolipopeptide isolated from myxobacteria—was synthesized, and activity‐based protein profiling identified aldo‐keto reductase 1C3 (AKR1C3) as its main target in human cells. Structure‐activity relationship studies, together with biophysical characterization and X‐ray crystallography, elucidated the structural basis of AKR1C3 ...
Thomas Siemon, Vivek K. Mishra, Mingming Zhao, Konrad Büssow, Alexander Popoff, Chengzhang Fu, Rolf Müller, Lothar Jänsch, Wulf Blankenfeldt, Mark Brönstrup   +9 more
wiley   +1 more source

Lipase-mediated epoxidation of alkenes in supercritical carbon dioxide

Green Chemistry Letters and Reviews, 2018
In this work, supercritical carbon dioxide was used as reaction media in the lipase-mediated epoxidation of alkenes for the first time. Under the optimal conditions (alkene (1 mmol), novozym 435 (15 mg), H2O2 (50% aqueous solution, 1.4 mmol), n-caprylic ...
Jiaxin Zhang, Wenwei Qian, Chunyu Wang, Ziyi Cao, Shanshan Chen, Liu Zhang, Yang Zhang, Lei Wang   +7 more
doaj   +1 more source

Formation of Tetrahydrofurano-, Aryltetralin, and Butyrolactone Norlignans through the Epoxidation of 9-Norlignans

Molecules, 2020
Epoxidation of the C=C double bond in unsaturated norlignans derived from hydroxymatairesinol was studied. The intermediate epoxides were formed in up to quantitative conversions and were readily further transformed into tetrahydrofuran, aryltetralin ...
Patrik A. Runeberg, Dominique Agustin, Patrik C. Eklund   +2 more
doaj   +1 more source

Síntese e caracterização de catalisadores óxidos metálicos para oxidação catalítica total de BTX (benzeno, tolueno e orto-xileno) e transformação química de monoterpenos [PDF]

, 2014
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2014.A pesquisa sobre o desenvolvimento de novas tecnologias que possibilitem a substituição das ...
Balzer, Rosana
core  

Ketone-catalyzed asymmetric epoxidation reactions

, 2004
This Account summarizes our efforts in developing organic ketone catalysts for enantioselective and diastereoselective epoxidation of olefins. We have developed an efficient and general protocol for epoxidation of olefins using dioxiranes generated in ...
Yang, D, Dan Yang
core   +1 more source

π‐Extended Salphen Scaffolds Enable CO2 Electroreduction and Singlet Oxygen Generation

Chemistry – A European Journal, EarlyView.
New family of π‐extended salen ligands bearing phenylene bridge and tunable phenyl‐based substituents, and their corresponding boron difluoride complexes. Thanks to the extended π‐delocalization over the molecule, the ligands themselves show promising results in electrochemical CO2 reduction to CO, while the complexes act as efficient photosensitizers ...
Vincenzo Langellotti, André Korzun, Morgan J. McKee, Massimo Melchiorre, Taegeun Jo, J. Felipe Estrada‐Ruiz, Gregor Schnakenburg, Stefano Crespi, Francesco Ruffo, Nikolay Kornienko, Alessandro Bismuto   +10 more
wiley   +1 more source