Nilo CastañedoKlaus PesekeH. KellingManfred Michalik2026-03-222026-03-22198310.1002/prac.19833250503https://doi.org/10.1002/prac.19833250503https://andeanlibrary.org/handle/123456789/59626Citaciones: 21 H‐N.M.R. Spectroscopic Investigations on Stereochemistry of Substituted Butadienes The butadienes 1–6 , obtained by Knoevenagel condensation of furfuryliden, 5‐bromofurfuryliden, and benzylidenaceton with malononitril and ethyl cyanoacetat respectively, have been investigated 1 H ‐n.m.r. spectroscopically. Structure and configuration of the isomers could be determined with the help of deuteration experiments, anisotropy effects, and Eu(fod) 3 shift reagents measurements.enKnoevenagel condensationChemistryCondensationReagentStereochemistryPhysical chemistryarticle