108946-86-7Relevant academic research and scientific papers
The Vinylogous Tricarbonyl Chromophore. Violerythrine End Groups and Related Six-Membered Ring Compounds. Their Synthesis, Conformation, and Investigation by Photoelectron, UV, and NMR Spectroscopy and by Crystal Structure Analysis
Martin, Hans-Dieter,Kummer, Matthias,Martin, Georg,Bartsch, Juergen,Brueck, Dieter,et al.
, p. 1133 - 1150 (2007/10/02)
The synthesis of five- and six-membered rings 3a, 4, 5b, 5c, and 17a, containing the structural moiety 3-pentene-1,2,5-trione, is described.The chromophoric properties of these vinylogous tricarbonyls together with related compounds are investigated.The conformation in solution, particularly the torsion angle ring/sidechain, can be derived from measurements of 3JCH coupling constants, NOE difference spectra, and force-field calculations.X-ray structure analyses of 11a, 17a, 18a, and 35 afford geometries in the solid state.Ionization energies are determined by means of photoelectron spectroscopy.The theoretical calculations and interpretation of absorption spectra and colour are carried out using the models CNDO/S-CI and HAM/3.
THE OXYGENATION OF α-ISOPHORONE AND ITS SILYL ENOL ETHER WITH t-BuOOH IN THE PRESENCE OF METAL CATALYSTS
Hosokawa, Takahiro,Inui, Shiro,Murahashi, Shun-Ichi
, p. 1081 - 1082 (2007/10/02)
Treatment of α-isophorone (1) with t-BuOOH in the presence of palladium(II) or copper(I) catalyst gives ketoisophorone (2) selectively.A similar treatment of silyl enol ether 7 derived from 1 affords 6-hydroxylisophorone 8.
