Dimethyl 10-methoxy-9-anthryl phosphate (3) and dimethyl 4, 5dichloro-lO-methoxy-9- anthryl phosphate (5) were synthesized by treating anthraquinone and l, &dichloroanthraquinone with trimethyl phosphite. The structure of 5 was shown by its conversion into 1, 8dichloro-9-anthrone on treatment with a hydriodic acetic acid mixture and by its formation of 4, 5dichloro-l0-methoxyanthrone in aqueous sodium hydroxide. ...