[CH2:1]1[CH:14]2[CH:5]([C:6](=[O:16])[C:7]3[C:12]([C:13]2=[O:15])=[CH:11][CH:10]=[CH:9][CH:8]=3)[CH2:4][CH:3]=[CH:2]1.[H][H]>[Pd].C(O)(=O)C>[CH2:4]1[C:5]2[C:14](=[C:13]([OH:15])[C:12]3[C:7]([C:6]=2[OH:16])=[CH:8][CH:9]=[CH:10][CH:11]=3)[CH2:1][CH2:2][CH2:3]1300 ml of acetic acid, 64 g of 1,4,4a,9a-tetrahydro-anthraquinone and 0.6 g of a catalyst containing 5% of palladium deposited on charcoal are introduced into an autoclave. The charge is heated to 100° C. and hydrogen is introduced under a pressure of 30 bars. The reaction is continued for 4 hours while maintaining the pressure at between 20 and 30 bars. After cooling, the precipitate obtained is separated by filtration, washed with water and dried. 56 Grams of 1,2,3,4-tetrahydro-9,10-anthracene-diol (melting point 210°-212° C.) are obtained. The yield is 86.7% without taking into account the fraction of product remaining in solution in the acetic acid.
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