Results 11 to 20 of about 29,601 (261)

Modification of chiral dimethyl tartrate through transesterification : immobilisation on POSS and enantioselectivity reversion in Sharpless asymmetric epoxidation [PDF]

open access: yes, 2010
Modification of dimethyl tartrate has been investigated through transesterification with aminoalcohols to provide reactive functionalities for the covalent bonding of chiral tartrate to polyhedral oligomeric silsesquioxanes.
Van Grieken, Rafael   +4 more
core   +4 more sources

Substituted Epoxides by Lithiation of Terminal Epoxides [PDF]

open access: yesOrganic Letters, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hodgson, D, Reynolds, N, Coote, S
openaire   +2 more sources

Chiral Epoxides by Desymmetrizing Deprotonation ofmeso-Epoxides

open access: yesAngewandte Chemie, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hodgson, D, Gras, E
openaire   +3 more sources

Enabling Highly (R)-Enantioselective Epoxidation of Styrene by Engineering Unique Non-Natural P450 Peroxygenases [PDF]

open access: yes, 2020
Unlike the excellent (S)-enantioselective epoxidation of styrene performed by natural styrene monooxygenase (ee >99%), the (R)-enantioselective epoxidation of styrene has not yet achieved a comparable efficiency using natural or engineered oxidative ...
Zhiqi, Cong   +9 more
core   +1 more source

Epoxidação do óleo de soja com o sistema catalítico [MoO2(acac)2]/TBHP EM [bmim][PF6]

open access: yesQuímica Nova, 2012
Epoxidation of soybean oil was investigated using 1-n-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF6] ionic liquid as biphasic medium with molybdenum(VI) acetylacetonate complex and tert-butyl hydroperoxide TBHP as oxidizing agent.
Maritana Farias, Márcia Martinelli
doaj   +1 more source

A continuous protocol for the epoxidation of olefins, monocyclic terpenes, and Alpha Beta Unsaturated Carbonyl Synthons using eco-friendly Flow Reactor Conditions

open access: yesResults in Engineering, 2022
Herein, we report a simple synthetic protocol for selective epoxidation of olefins, monocyclic terpenes, and chalcones using a continuous semi-batch process in good to excellent yields.
Chidambaram R. Ramaswamy   +7 more
doaj   +1 more source

The comparative quantum chemical study of the epoxidation reaction mechanism of eugenol and isoeugenol with peracetic and perbenzoic acids

open access: yesЖурнал органічної та фармацевтичної хімії, 2019
Aim. To study the kinetics of the epoxidation reaction for eugenol and isoeugenol with perbenzoic acid, carry out the comparative quantum chemical study of the epoxidation reaction mechanism of eugenol and isoeugenol isomers (2-cis and 2-trans) with ...
O. M. Agafonov   +2 more
doaj   +1 more source

Kinetic models of reaction systems for the in situ epoxidation of unsaturated fatty acid esters and triglycerides [PDF]

open access: yesHemijska Industrija, 2004
Mathematical models that describe the kinetics of reaction systems for the in situ epoxidation of unsaturated fatty acid esters or triglycérides with organic peracids are reviewed in this paper. The advantages and inadequacies of each model are discussed.
Janković Milovan R.   +1 more
doaj   +1 more source

Epoxidation of Soybean Oil and its Blend with Waste Cooking Oil Using H2SO4 as Homogeneous Catalyst

open access: yesChemical Engineering Transactions, 2023
Epoxidation of soybean oil is carried out at different conditions such as the feed ratio of C=C/CH3COOH/H2O2 (1:1:1, 1:1:2, 1:2:1, 1:2:2, 1:2:4), reaction temperature (50 °C, 65 °C) and reaction time (3–7 h). Physicochemical properties of the reagent and
Hong-Phuong Phan   +2 more
doaj   +1 more source

Chemo-enzymatic epoxidation of fatty compounds – Focus on processes involving a lipase-catalyzed perhydrolysis step

open access: yesOléagineux, Corps gras, Lipides, 2008
At the industrial scale, the chemical Prileshajev reaction is currently the only method applied to produce epoxidized plant oils. Using enzymes could be an alternative way allowing an environmentally benign and more selective epoxidation reaction.
Tiran Céline   +3 more
doaj   +1 more source

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