Tautomerism of representative aromatic α-hydroxy carbaldehyde anils as studied by spectroscopic methods and AM1 calculations. Synthesis of 10-hydroxyphenanthrene-9-carbaldehyde
作者:Sergio H. Alarcón、Alejandro C. Olivieri、Guillermo R. Labadie、Raquel M. Cravero、Manuel González-Sierra
DOI:10.1016/0040-4020(95)00002-p
日期:1995.4
The synthesis of 10-hydroxyphenanthrene-9-carbaldehyde and its anil are described. The structure of the latter compound has been thoroughly studied by H-1 and C-13 NMR, UV-visible absorption, fluorescence and IR spectroscopies. All the experimental results support the existence of this anil mainly in the keto-enamine tautomeric form. A comparison is presented with previously studied anils derived from salicylaldehyde and 2-hydroxynaphthalene-1-carbaldehyde. Semiempirical calculations (AM1) concerning the relative stability of tautomers as well as the optimized molecular geometries are in good agreement with the experimental findings.
Homologation of Vicinal Polyketone Networks to Epoxy Ketones with Diazomethane
作者:Leo A. Paquette、Ryan E. Hartung
DOI:10.3987/com-04-s(p)9
日期:——
Eistert et al., Chemische Berichte, 1958, vol. 91, p. 2710,2717