Formation of Cyclopent[hi]acephenanthrylene From 1,2-, 1,3-, 1,4- and 2,3-Triphenylenedicarboxylic Acid Derivatives on Flash Vacuum Pyrolysis at >900°C
Studies on the reaction of 1,2-dicarbonyl compounds with dimethyl 3-ketoglutarate. Steric and electronic effects
作者:G. Kubiak、J.M. Cook、U. Weiss
DOI:10.1016/s0040-4039(00)98951-2
日期:1985.1
The steric and electronic influences of substituents attached to the 1,2-dicarbonyl system on the success of the reaction of 1,2- diketones with dimethyl 3-ketoglutarate have been examined. It is clear from the reaction of with benzil, thienil, furil, and phenanthrenequinone , respectively, coupled with 13C NMR spectroscopy of the reaction intermediates, that stericeffects play a major role in the