
TY  - JOUR
A1  - Gillis, RG 
A1  - Porter, QN 
T1  - 5-Methoxyphenanthrene-4-carboxylic Acid
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1989
VL  - 42
IS  - 6
SP  - 1007
EP  - 1010
KW  - 
UR  - https://doi.org/10.1071/CH9891007 
N2  - Lead tetraacetate oxidation of phenanthrene-4,5-dicarboxylic acid in acetonitrile with pyridine affords 5-hydroxyphenanthrene-4-carboxylic acid as its lactone , which can be methylated as the sodium salt, giving 5-methoxyphenanthrene-4-carboxylic acid, albeit in poor yield. New spectroscopic evidence (particularly 13C n.m.r.) confirms that 5-formylphenanthrene-4-carboxylic acid, which is an intermediate in the synthesis, exists as the lactol , 4-hydroxyphenanthro[4,5-cdeloxepin-G(4H)-one. 
ER  -

