15222-54-5Relevant articles and documents
The Strustures of Some Metabolites of Penicillium diversum: α- and β-Diversonolic Esters
Holker, John S.E.,O'Brien, Eugene,Simpson, Thomas J.
, p. 1365 - 1368 (1983)
The metabolites of Penicillium diversum include the meroterpenoids austinol (1) and isoaustin (2), together with the known poly-β-ketides lichenxanthone (3), alternariol monomethyl ether (4), and two new compounds, α- and β-diversonolic esters, (5) and (6) respectively.The structure elucidation of the latter compounds is based essentially on extensive 1H and 13C n.m.r. spectroscopic studies.The biogenetic significance of these compounds is discussed.
Acylation of Multiple Anions of Poly-β-ketones by Hydroxy- and Alkoxybenzoates. Cyclization of the Resultant Tetraketones to Benzophenones and Xanthones
Sandifer, Ronda M.,Bhattacharya, Ajit K.,Harris, Thomas M.
, p. 2260 - 2267 (2007/10/02)
The dianion (2) of 2,4-pentanedione and the trianion (10) of 2,4,6-heptanetrione were acylated by lithium salts of the unprotected hydroxybenzoates methyl 2-hydroxy-4-methoxy-6-methylbenzoate (1b), methyl 2,6-dihydroxy-4-methoxybenzoate (7b), and methyl 2,4-dimethoxy-6-hydroxybenzoate (7c), as well as by the alkoxybenzoates methyl 2,4,6-trimethoxybenzoate (7d) and methyl 2,4,6-tribenzoxybenzoate (7e).The aryl 1,3,5,7-octanetetraones (11b-d and 12) resulting from acylation of 10 were cyclized in biomimetic processes to naturally occurring benzophenones and xanthones.Hydrogenolysis of 1-(2,4,6-tribenzoxyphenyl)-1,3,5,7-octanetetraone (11e) and cyclization gave norlichexanthone (20).