Cathecol hydrazone derivatives, process for preparing the same and pharmaceutical composition containing the same
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United States of America Patent
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Aug 26, 2003
Grant Date -
N/A
app pub date -
Nov 13, 2001
filing date -
May 28, 1999
priority date (Note) -
Expired
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Abstract
The present invention provides novel cathecol hydrazone derivatives of formula (I) or pharmaceutically acceptable salts thereof, wherein R.sup.1 is C.sub.1-7 alkyl or C.sub.3-7 cycloalkyl; R.sup.2 is hydrogen, hydroxy, C.sub.1-5 alkyl or --CH.sub.2 CH.sub.2 C(.dbd.O)NH.sub.2 ; R.sup.3 and R.sup.4 are independently hydrogen, C.sub.1-7 alkyl, --C(.dbd.X)--R.sup.5, or 2-, 3- or 4-pyridyl, prymidyl or phenyl substituted with one or two selected from a group consisting of halogen, C.sub.1-6 alkoxy, nitro, trifluoromethyl, C.sub.1-6 alkyl and carboxyl, or R.sup.3 and R.sup.4 are directly bonded by C.sub.3-4 containing oxygen, sulfur or nitrogen to form a heterocyclic ring, X is oxygen, sulfur or NH and R.sup.5 is C.sub.1-7 alkyl, --NHR.sup.6, CONH.sub.2 or 2-, 3- or 4-pyridyl, prymidyl or phenyl substituted with one selected from a group consisting of halogen, C.sub.1-6 alkoxy, nitrile, trifluoromethyl, C.sub.1-6 alkyl and carboxyl, and R.sup.6 is hydrogen, hydroxy, NH.sub.2, C.sub.1-5 alkoxy, C.sub.1-5 alkyl, pyridyl or phenyl. ##STR1##
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