[Synthetic low-molecular weight interferon inducers: derivatives of diaminofluoren-9-one, diaminobenzophenones and diamino biphenyls].

Among the aminoacyl derivatives of 2,7-diaminofluoren-9-one a few compounds were found capable of inducing interferon in the mouse when administered perorally. One of them, 2,7-bis[(diethylamino)acetylamino]fluoren-9-one exhibited an inducing activity comparable to that of 2,7-bis-(2-diethylaminoethoxy)-fluoren-9-one (tilorone). The synthesis of derivatives of fluorene, fluorenol, fluorenone, diaminobenzophenone, diaminiodiphenylmethane and benzidine, all of them with corresponding side chains, allowed to establish structural requirements for interferon inducing capability.