The report describes the preparation and characterization of the fully aromatised helicenophane 8 and an improved high yield Diels-Alder reaction between diene 3 and ketone 4 carried out under high pressure. The new bromocycloadduct 5 is described. Conversion of cycloadduct 1 into the dihydrohelicenophanes 6 and 7 and attempts to aromatize them is discussed. All new compounds were characterized by their spectroscopic data, in particular by extensive NMR investigations.
Synthesis of helicenophanes containing two carbocyclic five-membered rings
MINUTI, Lucio;TATICCHI, Aldo;MARROCCHI, Assunta;
2005
Abstract
The report describes the preparation and characterization of the fully aromatised helicenophane 8 and an improved high yield Diels-Alder reaction between diene 3 and ketone 4 carried out under high pressure. The new bromocycloadduct 5 is described. Conversion of cycloadduct 1 into the dihydrohelicenophanes 6 and 7 and attempts to aromatize them is discussed. All new compounds were characterized by their spectroscopic data, in particular by extensive NMR investigations.File in questo prodotto:
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