81574-71-2Relevant articles and documents
Depsidone Synthesis. Part 21. A New Synthesis of Grisa-2',5'-diene-3,4'-diones
Sargent, Melvyn V.
, p. 403 - 411 (2007/10/02)
Treatment of suitably substituted methyl 2-phenoxybenzoates with titanium(IV) chloride and dry hydrogen chloride afforded grisa-2',5'-diene-3,4'-diones in high yield.The structures of these compounds followed from their thermal stability, their methanolysis to methyl 2-(4-hydroxyphenoxy)benzoates, and their reductive cleavage to 2,4'-dihydrobenzophenones.Treatment of the benzophenones with base gave xanthones.An attempt to synthesize dehydrogriseofulvin (1) by this method failed.