Results 21 to 30 of about 3,457 (280)
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 +2 more
doaj +2 more sources
NHeterocyclic Carbene Stabilized 1Bora-1,3-butadienes
, 2021 Deprotonation of [(NHC)(Fmes)B-allyl]+ borenium cations (NHC, IMes (a) or IMe2 (b); Fmes, 2,4,6-(CF3)3C6H2) provides an easy entry to the NHC-stabilized 1-bora-1,3-butadienes. They feature a planar s-trans-conformation just like 1,3-butadiene.
Gerhard Erker +7 more
core +1 more source
In vitro and in vivo mutagenicity of the butadiene metabolites butadiene diolepoxide, butadiene monoepoxide and diepoxybutane [PDF]
Mutagenesis, 1997 Three metabolites of 1,3-butadiene, namely butadiene diolepoxide, butadiene monoepoxide and diepoxybutane, were tested in the bacterial mutation assay using Salmonella typhimurium strain TA100 with and without metabolic activation (S9 mix). All three compounds showed a mutagenic response. The bifunctional epoxide was more effective than the diolepoxide
I D, Adler +3 more
openaire +2 more sources
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
Sequential Transformations of 1,3-Dibora Butadienes to Enones or Tetrasubstituted 1,3-Butadienes
, 2016 Sequential Transformations of 1,3-Dibora Butadienes to Enones or Tetrasubstituted 1,3 ...
Guillaume Desurmont (3038538) +3 more
core +1 more source
Racemic and Asymmetric Diels−Alder Reactions of 1-(2-Oxazolidinon-3-yl)-3-siloxy-1,3-butadienes
, 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
, 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
, 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
Optimization of the Production of Rubber Compounds Using Mathematical Models
Advanced Engineering Materials, EarlyView.Rubber compounds were mixed in a batch internal mixer, and symbolic regression was used to derive mathematical models linking recipe and process parameters to ram path, torque, and mixing quality (incorporation, dispersion, distribution). Subsequent optimization with evolutionary algorithms identified operating conditions that reduce specific energy ...
Anke Bardehle +7 more
wiley +1 more source
Broadly Effective Enantioselective Diels−Alder Reactions of 1-Amino-substituted-1,3-butadienes
, 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