| 摘要 |
Heterocyclic-substituted 3-oxo-(2H)-1,2,4-triazine derivatives (I) are new. Triazine derivatives of formula (I) (including racemates, enantiomers, diastereomers and mixtures) and their salts are new. R1, R2 = H, 1-4C alkyl or phenyl-(1-4C) alkyl (optionally ring- substituted by one or more groups such as 1-4C alkyl, 1-3C alkoxy, halo or CF3), provided that R1 can be H only if A = NR3; A = O or NR3; R3 = H or methyl; B' = heterocyclic-substituted alkyl group of formula (i)-(iii); Ar = aromatic group such as phenyl, pyridyl or pyrimidyl, optionally substituted by one or more groups such as 1-3C alkyl, 1-3C alkoxy, OH, CF3 or halo; n = 3 - 5; m = 1 or 2; R4 = H or 1-3C alkyl. An Independent claim is included for the preparation of (I).
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