Cephem compound having catechol or pseudo-catechol structure

1. A compound of the formula:

or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof,

wherein

W is —CH 2 —, —S— or —O—;

a) U is —CH 2 —, —S—, —S(═O)— or —O— when W is —CH 2 —; or

b) U is —CH 2 — when W is —S— or —O—;

L is —CH 2 —, —CH═CH—, —CH 2 —CH═CH— or —CH═CH—CH 2 —;

R 1 is a substituted or unsubstituted carbocyclic group or a substituted or unsubstituted heterocyclic group;

with regard to R 2A and R 2B ,

a) R 2A is a hydrogen atom, a substituted or unsubstituted amino group, —SO 3 H, a substituted or unsubstituted amino sulfonyl group, carboxyl group, a substituted or unsubstituted (lower alkyl)oxycarbonyl group, a substituted or unsubstituted carbamoyl group, hydroxyl group, or a substituted carbonyloxy group; and R 2B is a hydrogen atom, or

b) R 2A and R 2B are taken together to form a substituted or unsubstituted methylidene group or a substituted or unsubstituted hydroxyimino group;

R 3 is a hydrogen atom, —OCH 3 or —NH—CH(═O);

R 11 is

E is a group selected from the following formulae which are substituted or unsubstituted on the ring:

wherein the bond to the quaternary nitrogen atom binds to L, and the other bond binds to R 10 ; p is an integer from 1 to 3; n is an integer of 1 or 2; R X is an optionally substituted lower alkyl group;

R 10 is R 12 or a group represented by the formula:

wherein ring A is a benzene ring, or a 6-membered aromatic heterocyclic group having 1-3 nitrogen atoms;

k is an integer from 2 to 5;

each R 4 is independently a hydrogen atom, halogen, hydroxyl group, —CN, —C(═O)—R 5 , —C(═O)—OH, —C(═O)—OR 5 , or —OR 5 ;

R 5 is a lower alkyl group or halo(lower)alkyl group; and

G is a single bond, a substituted or unsubstituted lower alkylene group, a substituted or unsubstituted alkenylene group or a substituted or unsubstituted alkynylene group;

B is a single bond or a 5- or 6-membered heterocyclic group containing at least 1-3 nitrogen atoms;

D is a single bond, —C(═O)—, —O—C(═O)—, —C(═O)—O—, —NR 6 —, —NR 6 —C(═O)—, —C(═O)—NR 6 —, —NR 6 —C(═O)—NR 6 —, —O—, —S—, —S(═O)—, —S(═O) 2 —NR 6 —, —NR 6 —S(═O) 2 —, —NR 6 —CH 2 —, —CH 2 —NR 6 — or —S(═O) 2 —;

each R 6 is independently a hydrogen atom or a substituted or unsubstituted lower alkyl group;

R 12 is a hydrogen atom, halogen, hydroxyl group, —SO 3 H, a substituted or unsubstituted amino group, a substituted or unsubstituted carboxyl group, a substituted or unsubstituted carbamoyl group, a substituted or unsubstituted acyl group, a substituted or unsubstituted amino sulfonyl group, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted lower alkenyl group, a substituted or unsubstituted lower alkynyl group, a substituted or unsubstituted non-aromatic carbocyclic group or a substituted or unsubstituted non-aromatic heterocyclic group.

2. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 10 is a group represented by the formula:

3. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 10 is R 12 wherein R 12 is as defined in claim 1 .

4. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein G is a single bond, —CH 2 —, —CH 2 —CH 2 —, —CH 2 —CH 2 —CH 2 —, —CH═CH—, —CH═CH—CH 2 —, —CH 2 —CH═CH—, —CH 2 —CH(CH 3 )—, —CH 2 —CH( i Pr)— or —CH 2 —CH(Ph)— wherein i Pr is isopropyl group and Ph is phenyl group.

5. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein B is a single bond or a group represented by the formula:

wherein the bond of the left side is attached to G and the bond of the right side is attached to D.

6. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein D is a single bond, —C(═O)—, —O—C(═O)—, —C(═O)—O—, —NR 6 —, —NR 6 —C(═O)—NR 6 —, —NR 6 —C(═O)— or —C(═O)—NR 6 — wherein R 6 is as defined in claim 1 .

7. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein the formula:

wherein each R 4 is independently hydrogen, halogen, hydroxyl group, —CN, —C(═O)—R 5 , C(═O)—OH, —C(═O)—OR 5 or —OR 5 ; and R 5 is as defined in claim 1 .

8. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 7 , wherein the formula:

9. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 7 , wherein the formula:

10. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein E is selected from the group consisting of the formulae (1) to (7), (10) to (12), (14), (25) to (29), (31), (42) to (44), (47), (50), (52), (53), (64) and (73).

11. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein E is selected from the group consisting of the formulae (3), (10) to (12), (26) to (28), (31), (42), (53), (64) and (73).

12. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein E is a group selected from the following formulae which are substituted or unsubstituted on the ring:

wherein the bond to the quaternary nitrogen atom binds to L, and the other bond binds to R 10 .

13. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein E-R 10 is a group selected from the following formulae which are substituted or unsubstituted on the ring:

wherein the bond to the quaternary nitrogen atom binds to L, and R 12 is as defined in claim 1 .

14. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein E-R 10 is

wherein the bond to the quaternary nitrogen atom binds to L.

15. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein U is —S—.

16. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein W is —CH 2 —.

17. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 3 is a hydrogen atom or —OCH 3 .

18. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 3 is a substituted or unsubstituted phenyl.

19. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 1 is represented by the formula:

wherein X is N, C(—H) or C(—Cl).

20. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 19 , wherein X is N.

21. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 19 , wherein X is C(—H) or C(—Cl).

22. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 2A is a hydrogen atom, a substituted or unsubstituted amino group, —SO 3 H, a substituted or unsubstituted amino sulphonyl group, carboxyl group, a substituted or unsubstituted carbamoyl group, hydroxyl group, or substituted carbonyloxy group, and R 2B is a hydrogen atom.

23. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 2A is a substituted amino group shown below:

a substituted amino sulfonyl group shown below:

wherein ring B represents a substituted or unsubstituted heterocyclic group;

a substituted carbamoyl group shown below:

wherein ring B represents a substituted or unsubstituted heterocyclic group; or

a substituted carbonyloxy group shown below:

wherein ring B represents a substituted or unsubstituted heterocyclic group.

24. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 2A and R 2B are taken together to form a substituted methylidene group shown below:

a substituted hydroxyimino group shown below:

wherein R 9 is a substituted or unsubstituted lower alkyl group.

25. The compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 2A and R 2B are taken together to form a substituted hydroxyimino group shown below:

wherein R 7 and R 8 are each independently a hydrogen atom, halogen, hydroxyl group, carboxyl group, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted carbocyclic group, or a substituted or unsubstituted heterocyclic group, or R 7 and R 8 may be taken together with a neighboring atom to form a substituted or unsubstituted carbocyclic group or a substituted or unsubstituted heterocyclic group;

Q is a single bond, a substituted or unsubstituted carbocyclic group or a substituted or unsubstituted heterocyclic group; and

m is an integer from 0 to 3.

26. A pharmaceutical composition, which comprises a compound or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof according to claim 1 .