| 摘要 |
<p>The present invention provides novel cathecol hydrazone derivatives of formula (I) or pharmaceutically acceptable salts thereof, wherein R1 is C¿1-7? alkyl or C3-7 cycloalkyl; R?2¿ is hydrogen, hydroxy, C¿1-5? alkyl or -CH2CH2C(=O)NH2; R?3 and R4¿ are independently hydrogen, C¿1-7? alkyl, -C(=X)-R?5¿, or 2-, 3- or 4-pyridyl, prymidyl or phenyl substituted with one or two selected from a group consisting of halogen, C¿1-6? alkoxy, nitro, trifluoromethyl, C1-6 alkyl and carboxyl, or R?3 and R4¿ are directly bonded by C¿3-4? containing oxygen, sulfur or nitrogen to form a heterocyclic ring, X is oxygen, sulfur or NH and R?5¿ is C¿1-7? alkyl, -NHR?6¿, CONH¿2? or 2-, 3- or 4-pyridyl, prymidyl or phenyl substituted with one selected from a group consisting of halogen, C1-6 alkoxy, nitrile, trifluoromethyl, C1-6 alkyl and carboxyl, and R?6¿ is hydrogen, hydroxy, NH¿2?, C1-5 alkoxy, C1-5 alkyl, pyridyl or phenyl.</p> |
