| 摘要 |
The invention relates to compounds having the general formula (I) <CHEM> wherein n is zero, 1 or 2; each of R1 and R2 is independently: a) hydrogen, halogen, trifluoromethyl or C1-C6 alkyl; b) hydroxy, C1-C6 alkoxy or C3-C4 alkenyloxy; c) nitro, amino, formylamino or C2-C8 alkanoylamino; R3 represents hydrogen or C1-C8 alkyl; R4 is: a') C1-C20 alkyl, unsubstituted or substituted by <CHEM> wherein each of Ra and Rb is independently phenyl or C1-C6 alkyl, or Ra and Rb, taken together with the nitrogen atom to which they are linked, form a N-pyrrolidinyl, N-piperazinyl, hexahydroazepin-1-yl, thiomorpholino, morpholino or piperidino ring, wherein said heterocyclic rings may be unsubstituted or substituted by C1-C6 alkyl or phenyl; b') C5-C10 cycloalkyl, unsubstituted or substituted by methyl; c') 2- or 3-pyrrolidinyl, piperidyl of 2-piperazinyl, wherein said heterocyclic rings may be unsubstituted or substituted by C1-C6 alkyl; d') isoxazolyl or thiazolyl, wherein said heterocyclic rings may be unsubstituted or substituted by C1-C6 alkyl; e') pyridyl, unsubstituted or substituted by one or two substituents chosen independently from halogen, C1-C6 alkyl and C1-C6 alkoxy; or f') phenyl, unsubstituted or substituted by one or two substituents chosen independently from halogen, CF3,C1-C6 alkyl, C1-C6 alkoxy, amino, nitro, formylamino and C2-C8 alkanoylamino, and the pharmaceutically acceptable salts thereof, which possess immunomodulating activity and are useful e.g. in the treatment of neoplastic diseases and acute and chronic infections of both bacterial and viral origin in mammals. |
