
TY  - JOUR
A1  - Cosmo, R 
A1  - Sternhell, S 
T1  - Dehydrogenation of 4,5-Disubstitued 9,10-Dihydrophenanthrenes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1987
VL  - 40
IS  - 12
SP  - 2137
EP  - 2142
KW  - 
UR  - https://doi.org/10.1071/CH9872137 
N2  - Dehydrogenation rates of four 4,5-disubstituted 9,l0-dihydrophenanthrenes to the corresponding phenanthrenes by 10% palladium on charcoal for the substituents, H, OCH3, F and CH3, appear to be related to the size of the substituents. The preparation of three new phenanthrenes, viz. 4,5-dichlorophenanthrene, 4,5-difluoro-phenanthrene and 4,5-bis( trifluoromethyl ) phenanthrene, is described. Treatment of mesitylene with either 10% palladium on charcoal at reflux or 2,3-dichloro-5,6- dicyano-1,4-benzoquinone gives an appreciable yield of mesityl(3',5'-xylyl)methane. 
ER  -

