Unexpected formation of 5-alkylidene derivatives of hydantoin from the Michael addition of 4-phenylurazole to fumaric esters

Tetrahedron ◽  
2016 ◽  
Vol 72 (14) ◽  
pp. 1736-1741 ◽  
Author(s):  
Zahra Soltanzadeh ◽  
Gholamhassan Imanzadeh ◽  
Nader Noroozi-Pesyan ◽  
Ertan Şahin ◽  
Hemayat Hooshmand
Keyword(s):  
Michael Addition ◽  
Unexpected Formation ◽  
Derivatives Of ◽  
The Michael Addition

ChemInform Abstract: Unexpected Formation of 5-Alkylidene Derivatives of Hydantoin from the Michael Addition of 4-Phenylurazole to Fumaric Esters.

ChemInform ◽  
2016 ◽  
Vol 47 (28) ◽  
Author(s):  
Zahra Soltanzadeh ◽  
Gholamhassan Imanzadeh ◽  
Nader Noroozi-Pesyan ◽  
Ertan Sahin ◽  
Hemayat Hooshmand
Keyword(s):  
Michael Addition ◽  
Unexpected Formation ◽  
Derivatives Of ◽  
The Michael Addition

Synthesis of 2-fluoropropenoic acid derivatives

1983 ◽  
Vol 48 (1) ◽  
pp. 319-326 ◽  
Author(s):  
Vladimír Tolman ◽  
Pavla Špronglová
Keyword(s):  
Michael Addition ◽  
Free Acid ◽  
Propanoic Acid ◽  
Derivatives Of ◽  
The Michael Addition ◽  
Acid Esters

A method is described for the synthesis of 2-fluoropropenoic acid esters, amides, and nitrile from the corresponding derivatives of 2-fluoro-3-(4-toluenesulfonyloxy)propanoic acid by heating with potassium phthalimide in vacuo. The free acid Ia and its chloride have also been synthesized. The reactivity of esters and nitrile of acid Ia has been verified by the Michael addition of diethyl acetamidomalonate to these compounds.

Unexpected formation of derivatives of cyclobutene and thiacyclobutane from the reaction between dilithiated benzylacetylene and isothiocyanates

2001 ◽  
Vol 42 (28) ◽  
pp. 4687-4689 ◽  
Author(s):  
Lambert Brandsma ◽  
Anthony L Spek ◽  
Boris A Trofimov ◽  
Ol'ga A Tarasova ◽  
Nina A Nedolya ◽  
...  
Keyword(s):  
Unexpected Formation ◽  
Derivatives Of

Study of the Michael addition of β-cyclodextrin–thiol complexes to conjugated alkenes in water

2005 ◽  
pp. 669-671 ◽  
Author(s):  
N. Srilakshmi Krishnaveni ◽  
K. Surendra ◽  
K. Rama Rao
Keyword(s):  
Michael Addition ◽  
The Michael Addition

scholarly journals Facile and Promising Method for Michael Addition of Indole and Pyrrole to Electron-Deficienttrans-β-Nitroolefins Catalyzed by a Hydrogen Bond Donor Catalyst Feist’s Acid and Preliminary Study of Antimicrobial Activity

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Abdullah M. A. Al Majid ◽  
Mohammad Shahidul Islam ◽  
Assem Barakat ◽  
Mohamed H. M. Al-Agamy ◽  
Mu. Naushad
Keyword(s):  
Antimicrobial Activity ◽  
Hydrogen Bond ◽  
Michael Addition ◽  
Hydrogen Bond Donor ◽  
New Class ◽  
Optimum Reaction ◽  
Preliminary Study ◽  
Cooperative Hydrogen Bonding ◽  
The Michael Addition

The importance of cooperative hydrogen-bonding effects has been demonstrated using novel 3-methylenecyclopropane-1,2-dicarboxylic acid (Feist’s acid (FA)) as hydrogen bond donor catalysts for the addition of indole and pyrrole totrans-β-nitrostyrene derivatives. Because of the hydrogen bond donor (HBD) ability, Feist’s acid (FA) has been introduced as a new class of hydrogen bond donor catalysts for the activation of nitroolefin towards nucleophilic substitution reaction. It has effectively catalyzed the Michael addition of indoles and pyrrole toβ-nitroolefins under optimum reaction condition to furnish the corresponding Michael adducts in good to excellent yields (up to 98%). The method is general, atom-economical, convenient, and eco-friendly and could provide excellent yields and regioselectivities. Some newly synthesized compounds were for examinedin vitroantimicrobial activity and their preliminary results are reported.

scholarly journals Synthesis of new pyrrolidine-based organocatalysts and study of their use in the asymmetric Michael addition of aldehydes to nitroolefins

2017 ◽  
Vol 13 ◽  
pp. 612-619 ◽  
Author(s):  
Alejandro Castán ◽  
Ramón Badorrey ◽  
José A Gálvez ◽  
María D Díaz-de-Villegas
Keyword(s):  
Michael Addition ◽  
Bulky Substituent ◽  
Asymmetric Michael Addition ◽  
Iodination Reaction ◽  
Chiral Imines ◽  
New Compounds ◽  
The Michael Addition

New pyrrolidine-based organocatalysts with a bulky substituent at C2 were synthesized from chiral imines derived from (R)-glyceraldehyde acetonide by diastereoselective allylation followed by a sequential hydrozirconation/iodination reaction. The new compounds were found to be effective organocatalysts for the Michael addition of aldehydes to nitroolefins and enantioselectivities up to 85% ee were achieved.

Synthesis of biologically active heterocyclic compounds from allenic and acetylenic nitriles and related compounds

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Marthe Carine Djuidje Fotsing ◽  
Dieudonné Njamen ◽  
Zacharias Tanee Fomum ◽  
Derek Tantoh Ndinteh
Keyword(s):  
Michael Addition ◽  
Heterocyclic Compounds ◽  
Biological Activities ◽  
Biologically Active ◽  
Polycyclic Compounds ◽  
One Step ◽  
Pharmaceutical Properties ◽  
Related Compounds ◽  
Acetylenic Acids ◽  
The Michael Addition

Abstract Cyclic and polycyclic compounds containing moieties such as imidazole, pyrazole, isoxazole, thiazoline, oxazine, indole, benzothiazole and benzoxazole benzimidazole are prized molecules because of the various pharmaceutical properties that they display. This led Prof. Landor and co-workers to engage in the synthesis of several of them such as alkylimidazolenes, oxazolines, thiazolines, pyrimidopyrimidines, pyridylpyrazoles, benzoxazines, quinolines, pyrimidobenzimidazoles and pyrimidobenzothiazolones. This review covers the synthesis of biologically active heterocyclic compounds by the Michael addition and the double Michael addition of various amines and diamines on allenic nitriles, acetylenic nitriles, hydroxyacetylenic nitriles, acetylenic acids and acetylenic aldehydes. The heterocycles were obtained in one step reaction and in most cases, did not give side products. A brief discussion on the biological activities of some heterocycles is also provided.

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