Results 21 to 30 of about 10,194,470 (308)
Science Journal of University of Zakho, 2018 Diarylidene acetones (DAA) (1-5) had been prepared by the condensation of acetone with substituted benzaldehydes via Claisen-Schmidt reaction, DAA’s brought to condense with anthrone to afford the title compounds (6-10) through Michael addition.
Mohammed S. Hussein +2 more
doaj +1 more source
Solvent- and catalyst-free aza-Michael addition of imidazoles and related heterocycles [PDF]
, 2020 This work demonstrates the scope and limitations of the aza-Michael addition of imidazoles and related heterocycles with electron deficient olefins under solvent- and catalyst-free conditions. The reaction proceeds at 80°C within hours towards completion
Florian, Gobec +2 more
core +2 more sources
A new class of phthalimido-quinones synthesis
Orbital: The Electronic Journal of Chemistry, 2012 Four new Michael adducts from the reaction between 1,4-naphthoquinone and 2,3-dibromo-1,4-naphthoquinone with w-amino-N-alkylphthalamide derivatives were presented in this work.
Jeziane S. Alves +2 more
doaj +1 more source
Study of Michael-Michael-retro Michael addition catalyzed, by 9-amino-9-deoxyepiquinine using ESI-MS [PDF]
, 2007 The Michael-Michael-retro Michael addition catalyzed by 9-amino-9-deoxyepiquinine was monitored and the major intermediates and catalyst in the catalytic cycle were detected and characterized using ESI-MS/MS for the first time.
Xie, JW +6 more
core +2 more sources
International Journal of Electrochemical Science, 2007 Electrochemical oxidation of catechols (1a-e) has been studied in the presence of sulfite ion (3) as nucleophile in aqueous solution, using cyclic voltammetry and controlled-potential coulometry. The results indicate the participation of catechols (1a-e)
D. Nematollahi, E. Tammari, H. Karbasi
doaj +1 more source
Enantioselective Michael Addition: An Experimental Introduction to Asymmetric Synthesis [PDF]
, 2019 We adapted a classical asymmetric Michael addition for a 1-day experimental session (6-8 hrs) for third or fourth-year undergraduate students. The experiment follows up three steps : synthesis of a chiral Lewis Acid, LiAl(BINOL)2, then its use as a ...
Martin Tiano (5934035) +3 more
core +2 more sources
1,4-Dihydro-4-(nitromethyl)-2-phenyl-1-tosylquinoline-3-carbaldehyde
Molbank, 2016 An aza-Michael/Michael cascade reaction of 2-((E)-2-nitrovinyl)-N-tosylbenzenamine with 3-phenylpropiolaldehyde catalyzed by pyrrolidine has produced a new compound, 1,4-dihydro-4-(nitromethyl)-2-phenyl-1-tosylquinoline-3-carbaldehyde.
Kwang Min Ko, Sung-Gon Kim
doaj +1 more source
Molecules, 2022 Known as electrophiles, maleimides are often used as acceptors in Michael additions to produce succinimides. However, reactions with maleimides as nucleophiles for enantioselective functionalization are only rarely performed.
Hongwen Mu +4 more
doaj +1 more source
Electron-rich triarylphosphines as nucleophilic catalysts for oxa-Michael reactions
Beilstein Journal of Organic Chemistry, 2021 Electron-rich triarylphosphines, namely 4-(methoxyphenyl)diphenylphosphine (MMTPP) and tris(4-trimethoxyphenyl)phosphine (TMTPP), outperform commonly used triphenylphosphine (TPP) in catalyzing oxa-Michael additions.
Susanne M. Fischer +3 more
doaj +1 more source
A Simple Zinc-Mediated Method for Selenium Addition to Michael Acceptors
Molecules, 2020 In this work, we focused our attention on seleno-Michael type reactions. These were performed using zinc-selenolates generated in situ from diphenyl diselenide 1, 1,2-bis(3-phenylpropyl)diselenide 30, and protected selenocystine 31 via an efficient ...
Francesca Giulia Nacca +4 more
doaj +1 more source