84629-41-4Relevant academic research and scientific papers
Pd(0)-Catalyzed Conjugate Addition of Benzylzinc Chlorides to α,β-Enones in An Atmosphere of Carbon Monoxide: Preparation of 1,4-Diketones
Yuguchi, Motoki,Tokuda, Masao,Orito, Kazuhiko
, p. 908 - 914 (2004)
Pd(0)-catalyzed conjugate addition of benzylzine chloride to methyl vinyl ketone in the presence of chlorotrimethylsilane and lithium chloride in an atmosphere of carbon monoxide at room temperature afforded 1-phenyl-2,5-hexanedione monosilyl enol ether. In this catalytic carbonylation, four components are connected in one reaction. Successive acidic workup generated a variety of 1,4-diketones from substituted benzylzine chlorides or related compounds and α,β-enones. Some products were converted to cyclopentenones or five-membered heterocyclic compounds containing an N, O, or S atom.
Anisotropy Effects of Conjugated Cyclic Systems, V. 1H NMR Spectra of Mesityl Substituted Aromatic 6? Systems
Eberhardt, Udo,Deppisch, Bertold,Musso, Hans
, p. 119 - 135 (2007/10/02)
1,3-Dimethyl-2-mesitylcyclopentadiene (5) has been synthesized in two routes.The 1H NMR spectrum of the cyclopentadienyl anion 3 shows a difference of chemical shift values of the p- and o-methyl groups of Δδ = 0,25 ppm.Compared with bimesityl (2b) (Δδ = 0,47 ppm) and the tropylium ion 1 (Δδ = 0,56 ppm) this is a small Δδ value.This is interpreted by the influence of the ? electron density from the five-membered anion ring on the methyl groups through space.In the range 1 to 3 there is found a linear relationship for this influence.X-ray analysis of the ferrocene derivative 18 prepared from 3 confirms the perpendicular orientation of the mesityl and cyclopentadienyl rings.
