Results 31 to 40 of about 58,617 (322)

New Piperazine Derivatives Synthesized from Thio-Substituted Polyhalogeno-2-nitro-1,3-butadienes

open access: yesE-Journal of Chemistry, 2010
It is known that polyhalogeno-nitro-1,3-butadienes are important starting materials for the synthesis of polyfunctionalized bioactive heterocycles.
S. Goksin Aydinli, Cemil Ibis
doaj   +1 more source

1,4-Aminoarylation of Butadienes via Photoinduced Palladium Catalysis.

open access: yesAngewandte Chemie
A visible-light-induced, three-component palladium-catalyzed 1,4-aminoarylation of butadienes with readily available aryl halides and aliphatic amines has been developed, affording allylamines with excellent E-selectivity.
Yuan Cai, Gaurav Gaurav, Tobias Ritter
semanticscholar   +1 more source

Sequential Transformations of 1,3-Dibora Butadienes to Enones or Tetrasubstituted 1,3-Butadienes

open access: yes, 2016
Sequential Transformations of 1,3-Dibora Butadienes to Enones or Tetrasubstituted 1,3 ...
Guillaume Desurmont (3038538)   +3 more
core   +1 more source

Recent Advances in Inverse-Electron-Demand Hetero-Diels–Alder Reactions of 1-Oxa-1,3-Butadienes

open access: yesTopics in current chemistry, 2016
This review is an endeavor to highlight the progress in the inverse-electron-demand hetero-Diels–Alder reactions of 1-oxa-1,3-butadienes in recent years.
A. Pałasz
semanticscholar   +1 more source

4-Bromo-2H-1,3-oxazine-2,6(3H)-dione

open access: yesActa Crystallographica Section E, 2009
The title compound, C4H2BrNO3, is one of a series of three substituted oxauracils prepared as precursors in the preparation of 1-aza-1,3-butadienes. Although each structure has identical potential for N—H...O intermolecular hydrogen bonds, each
Damon Parrish   +3 more
doaj   +1 more source

Racemic and Asymmetric Diels−Alder Reactions of 1-(2-Oxazolidinon-3-yl)-3-siloxy-1,3-butadienes

open access: yes, 2016
Achiral and chiral 1-(2-oxazolidinon-3-yl)-3-siloxy-1,3-butadienes were prepared from readily available starting materials. Although more stable than the parent 1-amino-3-siloxy dienes, the 1-(2-oxazolidinon-3-yl)-3-siloxy-1,3-butadienes are still very ...
Jacob M. Janey (1831201)   +3 more
core   +1 more source

New Heterocyclic Precursors for Thermal Generation of Reactive, Electron-Rich 1,2-Diaza-1,3-butadienes

open access: yes, 2016
The preparation and thermolysis of new stable heterocyclic precursors of 1,2-diaza-1,3-butadienes is described. The resulting reactive diazadienes are trapped in situ with N-phenyldiazamaleimide.
Jessica E. Reed (2723554)   +2 more
core   +1 more source

Intermolecular Diels–Alder Cycloaddition/Cross-Coupling Sequences of 2‑Bromo-1,3-butadienes

open access: yes, 2020
2-Bromo-1,3-butadienes are demonstrated to be effective substrates for tandem Diels–Alder/transition metal cross-coupling reaction sequences. Intermolecular cycloaddition of a 2-bromo-1,3-diene with activated dienophiles proceeded under Lewis acid ...
Hans Choi (8366853)   +7 more
core   +1 more source

Broadly Effective Enantioselective Diels−Alder Reactions of 1-Amino-substituted-1,3-butadienes

open access: yes, 2016
A broad range of substituted 1-amino-1,3-butadienes undergo enantioselective Diels−Alder reactions with methacrolein in the presence of 5 mol % of Cr(III)-salen complex 1.
Tetsuo Iwama (2145706)   +2 more
core   +1 more source

The synthesis of new thiosubstituted butadienes, butenynes and butatrienes

open access: yes, 2021
By treatment of the pentachlorobutadiene 1 and of the tetrachlorobromobutadiene 9 with thiolates in ethanol, a very fast and extensive replacement of chlorine was observed even at room temperature.
Beyazit, Neslihan, Ibis, Cemil
core   +1 more source

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