Results 11 to 20 of about 1,004,074 (357)

Organocatalytic Cascade Reaction of Aliphatic Enals and Benzoylnitromethane: Synthesis of Enantioenriched Tetrasubstituted Cyclohexene Carbaldehyde

open access: yesJournal of Chemistry, 2020
A new example of the reactivity of enals with benzoylnitromethane was studied in a Michael-Michael-Aldol-Dehydration quadruple organocascade reaction.
Fredy A. David Rodriguez   +2 more
doaj   +1 more source

Biocatalytic decarboxylative Michael addition for synthesis of 1,4-benzoxazinone derivatives

open access: yesScientific Reports, 2022
The Candida antarctica lipase B (Novozym 435) is found to catalyze a novel decarboxylative Michael addition in vinylogous carbamate systems for the synthesis of 1,4-benzoxazinone derivatives.
Hossein Bavandi   +5 more
doaj   +1 more source

The aza-Morita-Baylis-Hillman reaction of electronically and sterically deactivated substrates. [PDF]

open access: yes, 2012
The aza-Morita–Baylis–Hillman (azaMBH) reaction has been studied for electronically and sterically deactivated Michael acceptors. It is found that electronically deactivated systems can be converted with electron-rich phosphanes and pyridines as ...
Abermil   +71 more
core   +1 more source

One-step synthesis of pyridines and dihydropyridines in a continuous flow microwave reactor [PDF]

open access: yes, 2013
The Bohlmann–Rahtz pyridine synthesis and the Hantzsch dihydropyridine synthesis can be carried out in a microwave flow reactor or using a conductive heating flow platform for the continuous processing of material. In the Bohlmann–Rahtz reaction, the use
Bagley, Mark C   +4 more
core   +2 more sources

Superelastic and pH-Responsive Degradable Dendrimer Cryogels Prepared by Cryo-aza-Michael Addition Reaction [PDF]

open access: yes, 2018
Dendrimers exhibit super atomistic features by virtue of their well-defined discrete quantized nanoscale structures. Here, we show that hyperbranched amine-terminated polyamidoamine (PAMAM) dendrimer G4.0 reacts with linear polyethylene glycol (PEG ...
Wang, Juan, Yang, Hu
core   +3 more sources

Progress in Catalytic Asymmetric Reactions with 7-Azaindoline as the Directing Group

open access: yesMolecules, 2023
α-Substituted-7-azaindoline amides and α,β-unsaturated 7-azaindoline amides have emerged as new versatile synthons for various metal-catalyzed and organic-catalyzed asymmetric reactions, which have attracted much attention from chemists.
Yan-Ping Zhang   +5 more
doaj   +1 more source

Combined experimental and computational investigations of rhodium-catalysed C-H functionalisation of pyrazoles with alkenes [PDF]

open access: yes, 2014
Detailed experimental and computational studies have been carried out on the oxidative coupling of the alkenes C(2)H(3)Y (Y=CO(2)Me (a), Ph (b), C(O)Me (c)) with 3-aryl-5-R-pyrazoles (R=Me (1 a), Ph (1 b), CF(3) (1 c)) using a [Rh(MeCN)(3)Cp*][PF(6)](2 ...
Algarra, Andrés G.   +6 more
core   +1 more source

Inserção de catalisador híbrido na síntese de beta-tiocetonas

open access: yesOrbital: The Electronic Journal of Chemistry, 2012
The Michael reaction (or Michael addition) involves the addition of a nucleophile, called Michael donor, to an electrophile (α,β-unsaturated), called Michael acceptor. Literature reports several types of nucleophiles applied in this reaction.
Mariana Pompilio Darbem   +2 more
doaj   +1 more source

Novel octapeptide as an asymmetric catalyst for Michael reaction in aqueous media [PDF]

open access: yes, 2013
In this work, three forms of a novel octapeptide have been evaluated as asymmetric catalysts for the Michael reaction. Low quantity catalyst loading, ecofriendly solvents, and reusability of organocatalyst successfully applied to attain excellent yields ...
Abd. Malek, Emilia   +5 more
core   +1 more source

Cascade aza-Michael Addition-Cyclizations; Toward Renewable and Multifunctional Carboxylic Acids for Melt-Polycondensation

open access: yesFrontiers in Chemistry, 2019
Although the aza-Michael addition reaction on various unsaturated (di-)carboxylic acids and esters of, for example, itaconic acid, is well-known, the consecutive cyclization reaction has not received much attention in literature. The products of this aza-
Geert J. Noordzij   +2 more
doaj   +1 more source

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