
TY  - JOUR
A1  - Cooke, RG 
A1  - Merrett, BK 
A1  - O'Loughlin, GJ 
A1  - Pietersz, GA 
T1  - Colouring matters of Australian plants. XXIII. A new synthesis of arylphenalenones and naphthoxanthenones
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1980
VL  - 33
IS  - 10
SP  - 2317
EP  - 2324
KW  - 
UR  - https://doi.org/10.1071/CH9802317 
N2  - 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. 
ER  -

