The present invention provides a process for preparing quinolonecarboxylic acid derivatives having the formula (I):
1
wherein R
1
is H, halogen, or amino; R
2
is halogen; R
3
is H, halogen, C
1-4
alkoxyl, or CN; R
4
is selected from the group consisting of C
3-6
cycloalkyl, C
1-4
alkyl, C
1-4
alkoxyC
1-4
alkyl, and C
1-4
alkylaminoC
1-4
alkyl. The invention also provides new acetophenones having the formula (II) that are intermediates for preparing the compound of the formula (I).
A NEW PROCESS FOR PREPARING A QUINOLONE-CARBOXYLIC ACID
申请人:Lynchem Co., Ltd.
公开号:EP1319656A1
公开(公告)日:2003-06-18
The present invention provides a process for preparing quinolinecarboxylic acid derivatives having the formula (I):
wherein R1 is H, halogen, or amino; R2 is halogen; R3 is H, halogen, C1-4 alkoxyl, or CN; R4 is selected from the group consisting of C3-6cycloalkyl, C1-4alkyl, C1-4 alkoxyC1-4alkyl, and C1-4alkylaminoC1-4alkyl. The invention also provides new acetophenones having the formula (II) that are intermediates for preparing the compound of the formula (I).
The present invention provides a process for preparing quinolonecarboxylic acid derivatives having the formula (I):
wherein R1 is H, halogen, or amino; R2 is halogen; R3 is H, halogen, C1-4 alkoxyl, or CN; R4 is selected from the group consisting of C3-6cycloalkyl, C1-4alkyl, C1-4alkoxyC1-4alkyl, and C1-4alkylaminoC1-4alkyl. The invention also provides new acetophenones having the formula (II) that are intermediates for preparing the compound of the formula (I).