Mi. Dawson et al., SYNTHESIS OF DRO-5',5',8',8'-TETRAMETHYL-2'-ANTHRACENYL)BENZOIC ACID FOR BINDING-STUDIES OF RETINOIC ACID RECEPTORS, Journal of labelled compounds & radiopharmaceuticals, 33(7), 1993, pp. 633-637
[1',3',4'-H-3(3)]4- (5', 6', 7', 8'-Tetrahydro-5', 5', 8',8'-tetrameth
yl-2'-anthracenyl)benzoic acid (specific activity 64 Ci/mmole) was syn
thesized by bromination of ethyl o-5',5',8',8'-tetramethyl-2'-anthrace
nyl)benzoate, followed by reductive debromination by tritium gas in th
e presence of 10% palladium on carbon and hydrolysis. H-1 and H-3 NMR
spectroscopy was used to establish tritium at 1',3',4'-tetrahydroanthr
acenyl ring positions.