108946-96-9Relevant academic research and scientific papers
Methoxy(phenylthio)(trimethylsilyl)methane as a One-Carbon Homologation Reagent: Efficient 1,4-Addition of a Formyl or a Carboxy Anion Equivalent to Cyclic α-Enones Concomitant with in Situ α-Alkylation
Otera, Junzo,Niibo, Yoshihisa,Nozaki, Hitosi
, p. 5003 - 5007 (2007/10/02)
Efficient 1,4-addition of a formyl and carboxy anion equivalent is realized by use of lithium.Of further synthetic value is consecutive α-alkylation by in situ trapping of intermediary enolates with various alkyl
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.
