| 摘要 |
3-Heteroaryl-2-oxazolidinone derivs. of formula (I) and their salts and S-oxides are new: R1 = azido, OH, OR2, OSO2R3 or NR4R5; R2 = 1-8C acyl or a protecting gp.; R3 = 1-4C alkyl, phenyl or (1-4C alkyl)phenyl; R4, R5 = H, 1-8C alkyl, 3-6C cycloalkyl, phenyl or amino protecting gp., or one of R4, R5 = COR6; R6 = H, 1-8C alkyl, 3-6C cycloalkyl or phenyl; A = C-bonded 5-membered heteroaryl contg. 1-3 of S, N and/or O and opt. benzo- or naphtho-fused, the rings being opt. substd. by 1-3 of COOH, halo, CN, SH, CHO, CF3, NO2, 1-6C alkoxy, 2-6C alkoxycarbonyl, 1-6C alkylthio, 1-6C acyl and 1-6C alkyl, where alkyl is opt. substd. by OH, 1-5C alkoxy, 1-5C acyl or NR7R8; and/or NR7'R8'; and/or phenyl, (2-8C alkenyl)phenyl or 5- or 6-membered heterocyclyl contg. 1-3 of S, N and/or O, where these gps. are opt. substd. by CONR9R10, NR11R12, NR13SO2R14, SO2NR15R16, or S(O)aR17; and/or by 1-2 of COOH, halo, CN, SH, CHO, CF3, NO2, phenyl, 1-6C alkoxy, 2-6C alkoxycarbonyl, 1-6C alkylthio, 1-6C acyl and 1-6C alkyl, where alkyl is opt. substd. by OH, 1-5C alkoxy, 1-5C acyl or NR18R19; and/or 5-7C 3-oxo-1-cycloalkenyl; a =0-2; R7, R8 = H, 1-4C alkyl or phenyl; or NR7R8 = a satd. 5- or 6-membered ring opt. contg. another heteroatom selected from N, S and/or O and opt. substd. by 1-3C alkyl or acyl; R7', R8', R11, R12, R18, R19 = as R7 and R8; R9, R10, R13, R15, R16 = H, 1-6C alkyl or phenyl; R14, R17 = as R3. (I) are antimicrobial agents active against Gram-positive bacteria and bacterium-like microorganisms, e.g. Mycoplasma spp. (I) are useful for treating local or systemic infections in humans and animals. |
