A method of synthesizing esters by reacting a carboxylic acid with an alcohol, an ester with a carboxylic acid, or an ester with an alcohol. This method is characterized in that a partially dehydrated solid of a metal hydroxide whose metal belongs to Group III or IV of the Periodic Table ...
PURPOSE: To provide a hydrophobic immobilized modified enzyme immobilized on a photo-cross-linkable resin and provide a reaction process for synthesizing an ester in an organic solvent in the presence of the immobilized modified enzyme. ;CONSTITUTION: A hydrophobic enzyme modified with L-glutamic acid...
c This work: NiH-catalysed asymmetric hydroamidation of alkenyl boronates. Bpin, pinacol boronic ester. Full size image Recently, our group and others have disclosed an asymmetric hydrofunctionalization platform that uses olefins directly as nucleophiles and is enabled by a highly reactive chiral NiH...
Thus, other sulfur stereogenic centres, such as sulfinate ester, sulfinamide, sulfonimidate ester and sulfonimidamide, have started to attract attention. The diversity and complexity of these sulfur stereogenic centres have the potential to expand the chemical space for drug discovery6,7,8,9,10. ...
Moreover, assimilation of a ferrocenyl group into an organic material often yields unexpected properties. An exhaustive survey revealed that the literature on the biological evaluation and molecular modeling of ferrocene-poly(azomethine)ester is very scarce. The stability of ferrocenyl group in aqueous,...
A series of coumarin derivatives linked to amino acid ester side chains were synthesized and evaluated of their antibacterial and antifungal activity. The coumarin derivatives was alkylated by the ethyl bromoacetate and then using potassium carbonate to get alkylated hymecromone. Conventional solution met...
To improve the efficiency of the production of biodiesel (Fatty Acid Methyl Ester, FAME), a new production method for FAME is developed. The transesterification was carried out in a ultrasonic reactor using solid acid catalysts (cation-exchange resin or zeolite beta) under the atmospheric condition...
The presence of the attacking nucleophile leads to strong electromeric effects which make the nitrile and the ester group highly negative, causing the polarization of the double bond and activating the monomer to the nucleophilic attack. Then, the propagation takes the form of the addition of an ...
When electron transitions took place, some electrons in the HOMO would enter into the LUMO24; then, in the LUMO, the electrons were similarly delocalized on the bridge benzene ring and oxime ester moiety. The HOMO-LUMO gaps of 5c (0.160 a.u) and 7a (0.161 a.u) were very close to ...
Ambient-pressure alkoxycarbonylation for sustainable synthesis of ester Article Open access 07 September 2024 Introduction As an attractive C1 resource, CO2 can be converted to various kinds of value-added products1,2,3,4,5. Carboxylic acids are an important class of chemicals. Synthesis of carbox...