Antimicrobial quinolones, their compositions and uses

1. A process for preparing a compound according to the steps shown in Scheme I:

wherein the resulting compound is a compound according to Formula I:

wherein, for Formula I:

(a) X is selected from the group consisting of

(b) R1 is selected from the group consisting of C 3 to about C 5 cycloalkyl, C 1 to about C 2 alkanyl, C 2 to about C 3 linear alkenyl, C 3 to about C 4 branched alkanyl or alkenyl, all such alkyl or cycloalkyl moieties being unsubstituted or substituted with from one to about three fluoro; and phenyl, unsubstituted or substituted with from one to about three fluoro, or with one hydroxy in the 4-position;

(c) R8 is selected from the group consisting of fluoro, and chloro;

(d) R7 is amino which is attached to a ring carbon of X which is not adjacent to the ring nitrogen, the amino being unsubstituted or substituted with one or two C 1 to about C 3 alkanyl; or aminoalkanyl which is attached to any ring carbon of X and is C 1 to about C 3 alkanyl substituted with one amino, the amino being unsubstituted or substituted with one or two C 1 to about C 3 alkanyl;

(e) each R9 is independently selected from the group consisting of hydrogen, C 1 to about C 4 alkanyl, C 2 to about C 6 alkenyl or alkynyl, and a C 3 to about C 6 fused or spirocycle alkyl ring; or one R9 may optionally be selected from the group consisting of hydroxy, C 1 to about C 4 alkoxy, aryl and heteroaryl, all other R9 being hydrogen; all alkyl and aryl portions of R9 moieties being unsubstituted or substituted with one hydroxy or with from one to about three fluoro; and

(f) a R7 moiety described in (d) and a R9 moiety described in (e) may optionally be connected thus forming a fused or spirocycle ring with the N-containing ring shown in (a), the fused or spirocycle ring comprising from 2 to about 5 ring carbons and 0 or 1 ring nitrogen;

or an optical isomer, diastereomer or enantiomer thereof; a pharmaceutically-acceptable salt, hydrate, or biohydrolyzable ester, amide or imide thereof.

2. The process of claim 1 wherein, for the resulting compound of Formula I, X is

3. The process of claim 2 wherein, for the resulting compound of Formula I, each R9 is independently selected from the group consisting of hydrogen, C 1 to about C 4 alkanyl, C 2 to about C 6 alkenyl or alkynyl, and a C 3 to about C 6 fused or spirocycle alkyl ring; all such alkyl moieties being unsubstituted or substituted with from one to about three fluoro.

4. The process of claim 3 wherein, for the resulting compound of Formula I:

(a) R1 is selected from the group consisting of C 3 to C 5 cycloalkanyl, methyl, ethyl, ethenyl, isopropyl, isopropenyl, isobutyl, isobutenyl, t-butyl, all such alkyl or cycloalkanyl moieties being unsubstituted or substituted with from one to about three; and phenyl, unsubstituted or substituted with from one to about three fluoro, or with one hydroxy in the 4-position;

(b) R7 is attached to a ring carbon of X which is not adjacent to the ring nitrogen; and

(c) no more than two ring carbons of X have non-hydrogen R9's attached thereto.

5. The process of claim 4 wherein, for the resulting compound of Formula I:

(a) R7 is amino which is attached to a ring carbon of X which is not adjacent to the ring N, the amino being unsubstituted or substituted with one or two C 1 to about C 3 alkanyl; or is C 1 to about C 3 alkanyl substituted with one amino; and

(b) R9 is selected from the group consisting of hydrogen, C 1 to about C 4 alkanyl, C 2 to about C 6 alkenyl or alkynyl, and a C 3 to about C 6 spirocycle alkyl ring; all such alkyl moieties being unsubstituted or substituted with from one to about three fluoro.

6. The process of claim 5 wherein, for the resulting compound of Formula I, R8 is chloro.

7. The process of claim 4 wherein, for the resulting compound of Formula I;

(a) R1 is selected from the group consisting of cyclopropyl, ethyl, phenyl substituted with one to three fluoro, and 4-hydroxyphenyl;

(b) X comprises the piperidinyl ring;

(c) R7 is amino in the 3-position of the piperidinyl ring; and

(d) all R9 are hydrogen, or one non-hydrogen R9 is in the 4-position or 5-position of the piperidinyl ring.

8. The process of claim 7 wherein, for the resulting compound of Formula I:

(a) R1 is cyclopropyl; and

(b) all R9 are hydrogen, or one non-hydrogen R9 is selected from the group consisting of methyl, ethyl, dimethyl, spirocyclopropyl, methoxy, 2-thienyl and 2-furyl.

9. The process of claim 8 wherein, for the resulting compound of Formula I, R8 is chloro.

10. The process of claim 4 wherein, for the resulting compound of Formula I:

(a) R1 is selected from the group consisting of cyclopropyl, ethyl, phenyl substituted with one to three fluoro, and 4-hydroxyphenyl; and

(b) when X comprises the piperidinyl ring, R7 is amino unsubstituted or substituted with one C 1 to C 3 alkanyl or two methyl; when X comprises the pyrrolidinyl ring, R7 is aminoalkanyl which is methyl or ethyl or isopropyl substituted with one amino unsubstituted or substituted with one methyl or ethyl or dimethyl.

11. The process of claim 10 wherein for the resulting compound of Formula I:

(a) R1 is cyclopropyl or ethyl, unsubstituted or substituted with from one to about three fluoro;

(b) when X comprises the piperidinyl ring, R7 is amino or methylamino in the 3-position or 4-position of the ring; when X comprises the pyrrolidinyl ring, R7 is selected from the group consisting of aminomethyl, methylaminomethyl, 1-aminoethyl, 1-methylaminoethyl, 1-amino-1-methylethyl and 1-methylamino-1-methylethyl in the 3-position of the ring; and

(c) all R9 are hydrogen or only one ring carbon of X has a non-hydrogen R9 attached thereto, such non-hydrogen R9 being selected from the group consisting of methyl, ethyl, dimethyl and spirocyclopropyl.

12. The process of claim 11 wherein, for the resulting compound of Formula I, X comprises the pyrrolidinyl ring.

13. The process of claim 12 wherein, for the resulting compound of Formula I, R1 is cyclopropyl, and all R9 are hydrogen.

14. The process of claim 13 wherein, for the resulting compound of Formula I, R8 is chloro.

15. The process of claim 1 , wherein the resulting compound of Formula I is a compound selected from the group consisting of:

7-[3R-(1S-aminoethylpyrrolidinyl)]-1-ethyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-aminoethylpyrrolidinyl)-1-(2-fluoroethyl)]-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-aminoethylpyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-methylaminoethylpyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-amino-methylethylpyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-methylamino-methylethylpyrrolidinyl)]1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-aminoethyl-5-methyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-aminoethyl-5,5-dimethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-aminomethylethyl-5,5-dimethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-methylaminoethyl-5,5-dimethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-methylaminomethylethyl-5,5-dimethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-aminoethyl-5-ethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-aminomethylethyl-5-ethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1S-methylaminoethyl-5-ethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-methylaminomethylethyl-5-ethyl-pyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3R-(1-amino-1-cyclopropyl-methylpyrrolidinyl)]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[6R-(1S-aminoethyl)-4-azaspiro[2.4]heptanyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[6R-(1S-methylaminoethyl)-4-azaspiro[2.4]heptanyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[6R-(1S-amino-methylethyl)-4-azaspiro[2.4]heptanyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[6R-(1S-methylamino-methylethyl)-4-azaspiro[2.4]heptanyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

or a pharmaceutically-acceptable salt thereof.

16. The process of claim 1 , wherein the resulting compound of Formula I is a compound selected from the group consisting of:

7-[3S-aminopiperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-methylaminopiperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-amino-4R-methyl-piperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-amino-5S-methyl-piperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-amino-5R-methyl-piperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-amino-4R-ethyl-piperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-amino-6,6-dimethyl-piperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[3S-amino-6-methyl-piperidinyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[7-amino-5-azaspiro[2.5]-octanyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

7-[4-amino-6-azaspiro[2.5]-octanyl]-1-cyclopropyl-1,4-dihydro-8-chloro-6-hydroxy-4-oxo-3-quinolinecarboxylic acid;

or a pharmaceutically-acceptable salt thereof.