9-SUBSTITUTED 2-(2-N-ALKOXYPHENYL) PURIN-6-ONES, PROCESS OF THEIR PREPARATION, PHARMACEUTICAL COMPOSITION SUCH COMPOUNDS AND THEIR USE

9-Substd. 2-(2-alkoxyphenyl)-purin-6-ones of formula (I) and their tautomers and salts are new: A = -CR1R5-CR2R3-R4, -CR6R7R8 or -(CH2)aMe; a = 9-15; R1 = 2-10C alkyl or phenyl (2-10C) alkyl opt. ring-substd. by halogen, NO2, CN, 1-6C alkyl or SO2NR9R10; R9 and R10 = H, phenyl, 1-6C alkyl or 1-6C hydroxyalkyl, or NR9R10 is a 5- or 6-membered satd. ring which contains 0-2 further heteroatoms (S, N and/or O) and is opt. substd. via a free N atom by 1-6C alkyl or hydroxyalkyl; one of the above alkyl gps. (ambiguous) is opt. substd. by NR11R12; R11 and R12 = as defined for R9 and R10; R2 = H, azido, 1-6C alkyl, OR13, OSO2R14 or NR15R16; R3 = H; or R2+R3 = O or NOR20; R13 = H, a protecting gp., 1-6C acyl, benzoyl, or 1-6C alkyl opt. substd. by COOH, 2-6C alkoxycarbonyl or CONR17R18; R17 and R18 = H or 1-4C alkyl; R14 = 1-4C alkyl or phenyl; R15 and R16 = H, protecting gps., 1-6C alkyl, 1-6C acyl, CHO, benzoyl or SO2R19; R19 = 1-4C alkyl or phenyl; R20 = H or 1-6C alkyl opt. substd. by phenyl or NR21R22; R21 and R22 = H, phenyl or 1-6C alkyl; R4 = H or 1-4C alkyl; R5 and R8 = H or 1-3C alkyl; R6 = H or 1-5C alkyl or hydroxyalkyl; R7 = 2-8C alkyl substd. by NR23R24; R23 and R24 = H, 1-5C alkyl (opt. substd. by OH) or phenyl (1-5C) alkyl ring-substd. by SO2NR25R26; R25 and R26 = gps. as defined for R9 and R10; D = H or SO2NR27R28; R27 and R28 = gps. as defined for R9 and R10; E = 1-8C alkyl.