77664-72-3Relevant academic research and scientific papers
Colouring Matters of Australian Plants.XXIII.A New Synthesis of Arylphenalenones and Naphthoxantenones
Cooke, Raymond G.,Merrett,Bryan K.,O'Loughlin, Gary J.,Pietersz, Geoffrey A.
, p. 2317 - 2324 (2007/10/02)
Condensation of naphthalene-2,7-diol with 2,4-dioxo-4-phenylbutanoic acid gives 6-hydroxy-1-oxo-9-phenyl-1H-phenalene-7-carboxylic acid which is readily converted into the lactone and on treatment with diazomethane forms only methyl 6-methoxy-1-oxo-9-phenyl-1H-phenalene-7-carboxylate.Analogous reactions of other 4-aryl-2,4-dioxobutanoic acids with naphthalene-2,7-diol or with 3,6-dimethoxynaphthalene-2,7-diol give easy access to arylphenalenones and naphthoxanthenones related to natural pigments.
