Results 1 to 10 of about 58,617 (322)

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   +2 more
exaly   +6 more sources

Enantioselective and Regioselective Copper-Catalyzed Borocyanation of 1-Aryl-1,3-Butadienes [PDF]

ACS Catalysis, 2019
A multicomponent copper-catalyzed enantio- and regioselective borocyanation of 1-aryl-1,3-butadienes has been developed. The method provides access to functionalized allylic nitriles in up to 90% yield and 94% ee and thus overcomes some of the long ...
T. Jia, Marshall J. Smith, Alexander P. Pulis, G. Perry, D. Procter   +4 more
semanticscholar   +7 more sources

Palladium-catalyzed cross-coupling of cyclopropylmethyl N-tosylhydrazones with aromatic bromides: an easy access to multisubstituted 1,3-butadienes

Tetrahedron Letters, 2013
Direct synthesis of 1,1-disubstitued 1,3-butadienes has been efficiently realized from the cross-coupling of cyclopropylmethyl N-tosylhydrazones with aromatic bromides by means of PdCl2(MeCN)(2) as catalyst.
Huining Chai, Zhengkun Yu
exaly   +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

Copper-Catalyzed Direct Twofold C-P Cross-Coupling of Unprotected Propargylic 1,4-Diols: Access to 2,3-Bis(diarylphosphynyl)-1,3-butadienes.

Organic Letters, 2019
The first facile and efficient Cu-catalyzed direct coupling of unprotected propargylic diols with H-phosphine oxides was developed, providing a practical approach to access structurally diverse 2,3-bis(diarylphosphynyl)-1,3-butadienes along with the ...
Fushan Chen, Ying Xia, Rongcan Lin, Yuxing Gao, P. Xu, Yufen Zhao   +5 more
semanticscholar   +2 more sources

Ruthenium-catalyzed silylation of 1,3-butadienes with vinylsilanes.

Organic Letters, 2015
A novel method for the synthesis of 1-silyl-substituted 1,3-butadienes, based on [RuHCl­(CO)­(PCy3)2]-catalyzed silylative coupling of terminal (E)-1,3-dienes with vinylsilanes, is reported. The reaction provides a facile and straightforward access to (E,
Justyna Szudkowska‐Fratczak, B. Marciniec, Grzegorz Hreczycho, M. Kubicki, P. Pawluć   +4 more
semanticscholar   +2 more sources

Triazolopyridines 21.1 The stereochemistry of 1-[1,2,3]triazolo[1,5-a] pyridin-7-yl-4-(2H-[1,2,3]triazol-4-yl)-1,3-butadienes and triazolo ring opening derivatives

ARKIVOC, 2002
The synthesis and NMR study of the geometry of 1-[1,2,3]triazolo[1,5-a]pyridin-7-yl-4-(2H- [1,2,3]triazol-4-yl)-1,3-butadienes 1a, 1b, 5 and of new 1-(6-substituted-2-pyridyl)-4-(2H- [1,2,3]triazol-4-yl)-1,3-butadienes 8-10 is reported.
Belén Abarca, Rafael Ballesteros, Mostafá Elmasnaouy   +2 more
doaj   +2 more sources

Synthesis of semibullvalene derivatives via Co2(CO)8-mediated cyclodimerization of 1,4-dilithio-1,3-butadienes

, 2014
Co-2(CO)(8)-mediated cyclodimerization of 1,2,3,4-tetrasubstituted 1,4-dilithio-1,3-butadienes readily afforded octa-substituted semibullvalenes. The X-ray crystal structure of 1,2,5,6-tetraethyl-3,4,7,8-tetraphenyl semibullvalene was determined to show ...
Shaoguang Zhang, Ming Zhan, Qifeng Wang, Chao Wang, Wen‐Xiong Zhang, Z. Xi   +5 more
semanticscholar   +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