Results 1 to 10 of about 56,497 (271)

Diaza-1,3-butadienes as Useful Intermediate in Heterocycles Synthesis [PDF]

Molecules, 2022
Many heterocyclic compounds can be synthetized using diaza-1,3-butadienes (DADs) as key structural precursors. Isolated and in situ diaza-1,3-butadienes, produced from their respective precursors (typically imines and hydrazones) under a variety of ...
Jorge Heredia-Moya, Daniel A. Zurita, José Eduardo Cadena-Cruz, Christian D. Alcívar-León   +3 more
doaj   +3 more sources

α-Diimine Cisplatin Derivatives: Synthesis, Structure, Cyclic Voltammetry and Cytotoxicity [PDF]

Molecules, 2022
Three new Pt(II) complexes [(dpp-DAD)PtCl2] (I), [(Mes-DAD(Me)2)PtCl2] (II) and [(dpp-DAD(Me)2)PtCl2] (III) were synthesized by the direct reaction of [(CH3CN)2PtCl2] and corresponding redox-active 1,4-diaza-1,3-butadienes (DAD).
Dmitriy S. Yambulatov, Irina A. Lutsenko, Stanislav A. Nikolaevskii, Pavel A. Petrov, Ivan V. Smolyaninov, Irina K. Malyants, Victoria O. Shender, Mikhail A. Kiskin, Alexey A. Sidorov, Nadezhda T. Berberova, Igor L. Eremenko   +10 more
doaj   +2 more sources

Domino reactions of chromones with activated carbonyl compounds [PDF]

Beilstein Journal of Organic Chemistry
Domino reactions of chromones with activated carbonyl compounds, such as dimethyl acetone-1,3-dicarboxylate and 1,3-diphenylacetone, and with 1,3-bis(silyloxy)-1,3-butadienes, electroneutral equivalents of 1,3-dicarbonyl dianions, allow for a convenient ...
Peter Langer
doaj   +2 more sources

Michael addition of P-nucleophiles to azoalkenes provides simple access to phosphine oxides bearing an alkylhydrazone moiety [PDF]

Frontiers in Chemistry, 2023
β-Hydrazonophosphine oxides are precursors of useful organophosphorus compounds, including phosphorylated N-heterocycles, α-aminophosphonates, and vinylphosphonates.
Alexandr O. Kokuev, Alexey Yu. Sukhorukov   +1 more
doaj   +2 more sources

Electrochemical One-Step Synthesis of Alkyne Sulfonates and Sulfonamides: Building Blocks for Highly Substituted Alkenes and 1,3-Butadienes [PDF]

JACS Au
Meysam Azizzade, Florian A. Breitschaft, Siegfried R. Waldvogel, Till Opatz   +3 more
doaj   +2 more sources

One-Pot Synthesis of Push–Pull Butadienes from 1,3-Diethyl-2-thiobarbituric Acid and Propargylic Alcohols

Molbank, 2022
A new synthetic procedure for obtaining two previously reported donor-acceptor butadiene dyes, namely 5-(3,3-bis(4-methoxyphenyl)allylidene)-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione and 5-(3,3-bis(4-(dimethylamino)phenyl)allylidene)-1,3 ...
Javier Francos, Victorio Cadierno
doaj   +1 more source

Synthesis and Characterization of Multiple Functionalized Cyclohexanone Using Diels–Alder Reaction of α-Nitrocinnamate

Reactions, 2022
A systematic study of the Diels–Alder reaction of α-nitrocinnamate was performed. The reaction of p-substituted α-nitrocinnamate with 2,3-dimethyl-1,3-butadienes smoothly proceeded regardless of the p-substituent, which was either an electron-donating or
Takumi Hamada, Kento Iwai, Nagatoshi Nishiwaki   +2 more
doaj   +1 more source

Rotational Barrier and Conjugation: Theoretical Study of Resonance Stabilization of Various Substituents for the Donors NH₂ and OCH₃ in Substituted 1,3-Butadienes

Indonesian Journal of Chemistry, 2019
The barrier to internal rotation around the central C2–C3 single bond of a series of (1E)-monosubstituted 1,3-butadienes and (1E,3E)-1-Y-4-X-disubstituted butadienes, with Y=NH2 or OCH3 and X=NO2, CHO, COOH, CN, CF3, Cl or F, were studied at the density ...
Ali Hussain Yateem
doaj   +1 more source

Inverse Electron Demand Diels-Alder Reactions of Heterocyclic Azadienes, 1-Aza-1,3-Butadienes, Cyclopropenone Ketals, and Related Systems. A Retrospective.

Journal of Organic Chemistry, 2019
A summary of the investigation and applications of the inverse electron demand Diels-Alder reaction is provided that have been conducted in our laboratory over a period that now spans more than 35 years.
Jiajun Zhang, Vyom Shukla, D. Boger
semanticscholar   +1 more source

Synthesis of some novel annulated pyrido[2,3-d]pyrimidines via stereoselective intramolecular hetero Diels–Alder reactions of 1-oxa-1,3-butadienes

Beilstein Journal of Organic Chemistry, 2010
Some novel annulated pyrido[2,3-d]pyrimidines 6 and 7 were synthesized stereoselectively by intramolecular hetero Diels–Alder reactions involving 1-oxa-1,3-butadienes.
Mohit L. Deb, Pulak J. Bhuyan
doaj   +1 more source