Quinolone derivatives and processes for the preparation thereof

Details Quinolone derivatives and processes for the preparation thereof Quinolone derivatives and processes for the preparation thereof

1994-07-20

1998-10-06

Huang, Evelyn

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 9, 544 32, 544 66, 544101, 546100, 546113, 546123, C07D21556, C07D47104

Patent

active

058178201

ABSTRACT:
The present invention relates to optical isomers of quinoline compounds of Formula (IA) or Formula (IA'), their pharmaceutically acceptable salts and their intermediates: ##STR1## In the above formulae, A represent nitrogen or ##STR2## in which Y represents hydrogen, halogen such as fluorine or chlorine, lower alkyl or lower alkoxy such as methoxy, or together with R.sub.1 forms --CH.sub.2 CH.sub.2 CH.sub.2 --, CH.sub.2 CH.sub.2 CH(CH.sub.3)--, --OCH.sub.2 CH.sub.2 --, --OCH.sub.2 CH(CH.sub.3)--, --SCH.sub.2 CH.sub.2 -- or --SCH.sub.2 CH(CH.sub.3)--; R.sub.1 is as defined above or represents straight chain or cyclic lower alkyl group having 1 to 3 carbon atoms, a straight chain or cyclic lower alkyl group having 1 to 3 carbon atoms which is substituted with a halogen atom, a phenyl group or a phenyl group substituted with one or two halogen atoms, such as ethyl, cyclopropyl or 2,4-difluorophenyl; R.sub.4 represents hydrogen, lower alkyl, lower alkoxy, or an amino-protecting group, such as methyl, ethyl or butoxycarbonyl; R.sub.5, R.sub.6, R.sub.7 and R.sub.8 may be the same or different and represent independently hydrogen, lower alkyl optionally substituted by amino, hydroxy or halogen, such as methyl or ethyl; and X represents hydrogen, halogen such as fluorine or chlorine, amino or lower alkyl such as methyl.

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