An efficient synthesis of heptaaryldipyrromethenes from tetraarylcyclopentadienones and ammonium acetate and their extension to the corresponding BODIPYs
作者:Jichao Li、Binbin Hu、Gongfang Hu、Xihui Li、Ping Lu、Yanguang Wang
DOI:10.1039/c2ob26509e
日期:——
Heptaaryldipyrromethenes are efficiently prepared from ammonium acetate and tetraarylcyclopentadienones in a one-pot cascade process and can be converted into heptaaryl BODIPYs with fluorescent response to environmental acidity.
Darstellung und EPR-spektroskopie m-phenylen-verknuepfter biradikalischer bistetracyclon-metallketyle
作者:H. Kurreck、S. Obstreich
DOI:10.1016/s0040-4020(01)97574-x
日期:1974.1
From the corresponding metal ketyls—obtained by alkali metal reduction—EPR triplet powder spectra have been recorded. The spectra can be interpreted in terms of electron-electron dipolar coupling between the unpaired spins of randomly oriented molecules. The influences of substitution, concentration of the paramagneticspecies and of the nature of the alkali metal counter ion on the magnitude of the
Herein reported is a photoinduced dehydrogenative three-component coupling reaction of carbon monoxide with two molecules of methylarenes forming dibenzyl ketones. A gaseous dihydrogen molecule evolves as the byproduct, and neither oxidants nor hydrogen acceptors are required.