Results 11 to 20 of about 2,777 (221)

Isothiourea-Catalyzed Enantioselective Michael Addition of Malonates to α,β-Unsaturated Aryl Esters [PDF]

open access: yes, 2022
An enantioselective Michael addition of malonates to α,β-unsaturated para-nitrophenyl esters was achieved using the Lewis basic isothiourea HyperBTM, giving excellent levels of product enantioselectivity (up to >99:1 enantiomeric ratio) in good yields ...
Amy A. Watts (12723830)   +6 more
core   +3 more sources

Melaminium hydrogen malonate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2012
The melaminium (2,4,6-triamino-1,3,5-triazin-1-ium) cation in the title compound, C3H7N6+·C3H3O4−, is essentially planar, with a r.m.s. deviation of the non-H atoms of 0.0085 Å. Extensive hydrogen bonding of the types N—H...N and N—H...O between cations and cations and between cations and hydrogen malonate (2-carboxyethanoate) anions leads to the ...
Barbara Froschauer, Matthias Weil
openaire   +3 more sources

Effect of Microwaves in the Chiral Switching Asymmetric Michael Reaction

open access: yesMolecules, 2003
Highly enantioselective Michael reactions of malonates with cyclic enones are achieved in remarkably less time under microwave irradiation using newly developed heterobimetallic catalysts.
S. Velmathi, S. Narasimhan
doaj   +1 more source

Diethyl 2-((aryl(alkyl)amino)methylene)malonates: Unreported Mycelial Growth Inhibitors against Fusarium oxysporum

open access: yesMolbank, 2023
This paper presents the discovery and development of antifungal agents against Fusarium oxysporum (Fox), a devastating plant pathogen. Diethyl 2-((arylamino)methylene)malonates (DAMMs) were formed as side-products during the synthesis of polysubstituted ...
Willy-Fernando Cely-Veloza   +2 more
doaj   +1 more source

The Allylic Alkylation of Ketone Enolates

open access: yesChemistryOpen, 2020
The palladium‐catalyzed allylic alkylation of non‐stabilized ketone enolates was thought for a long time to be not as efficient as the analogous reactions of stabilized enolates, e. g. of malonates and β‐ketoesters.
Dr. Lukas Junk, Prof. Dr. Uli Kazmaier
doaj   +1 more source

Probing the Binding Requirements of Modified Nucleosides with the DNA Nuclease SNM1A

open access: yesMolecules, 2021
SNM1A is a nuclease that is implicated in DNA interstrand crosslink repair and, as such, its inhibition is of interest for overcoming resistance to chemotherapeutic crosslinking agents.
Eva-Maria Dürr, Joanna F. McGouran
doaj   +1 more source

Tandem Three-Component Reactions of Aldehyde, Alkyl Acrylate, and Dialkylmalonate Catalyzed by Ethyl Diphenylphosphine

open access: yesMolecules, 2012
A new highly efficient three-component reaction of alkyl acrylate, aldehyde and dialkyl malonate using ethyl diphenylphosphine as organocatalyst has been described.
Utpal Das   +7 more
doaj   +1 more source

Electrochemical Perspective on Hematite–Malonate Interactions

open access: yesColloids and Interfaces, 2021
Organic matter (OM) interactions with minerals are essential in OM preservation against decomposition in the environment. Here, by combining potentiometric and electrophoretic measurements, we probed the mode of coordination and the role of pH-dependent ...
Karolina Kędra   +6 more
doaj   +1 more source

Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition

open access: yesMolecules, 2015
An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is ...
Wen-Chang Chen   +8 more
doaj   +1 more source

Recoverable Phospha-Michael Additions Catalyzed by a 4-N,N-Dimethylaminopyridinium Saccharinate Salt or a Fluorous Long-Chained Pyridine: Two Types of Reusable Base Catalysts

open access: yesMolecules, 2021
Phospha-Michael addition, which is the addition reaction of a phosphorus-based nucleophile to an acceptor-substituted unsaturated bond, certainly represents one of the most versatile and powerful tools for the formation of P-C bonds, since many different
Eskedar Tessema   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy