Fused heterocyclic compounds as ion channel modulators

1. A compound of Formula XII:

Z 1 , Z 2 and Z 4 are each independently selected from the group consisting of CR 7 and N;

provided that one of Z 1 , Z 2 and Z 4 is N; and provided that only one of Z 1 , Z 2 and Z 4 is N;

n is 0, 1, 2, 3, 4 or 5;

R 2 is —C 1-6 alkylene-R 5 ,-L-R 5 , -L-C 1-6 alkylene-R 5 , —C 1-6 alkylene-L-R 5 or -C 1-6 alkylene-L-C 1-6 alkylene-R 5 ;

wherein each —C 1-6 alkylene is optionally substituted by one substituent independently selected from the group consisting of C 2-4 alkynyl, halo, —NO 2 , —CN, —O—R 20 , —N(R 20 )(R 22 ), —C(O)—R 20 , —C(O)—OR 26 , —C(O)—N(R 20 )(R 22 ), —N(R 20 )—S(O) 2 —R 20 , cycloalkyl, aryl, heteroaryl or heterocyclyl; and

wherein said cycloalkyl, aryl, heteroaryl or heterocyclyl are optionally substituted with one, two or three substituents independently selected from the group consisting of C 1-6 alkyl, C 2-4 alkynyl, halo, —NO 2 , cycloalkyl, aryl, heterocyclyl, heteroaryl, —N(R 20 )(R 22 ), —C(O)—R 20 , —C(O)—OR 20 , —C(O)—N(R 20 )(R 22 ), —CN and —O—R 20 ;

L is —O—, —S—, —C(O)—, —NHS(O) 2 —, —S(O) 2 NH—, —C(O)NH— or —NHC(O)—, provided that when R 2 is -L-R 5 or -L-C 1-6 alkylene-R 5 , then L is not —O—, —S—, —NHS(O) 2 — or —NHC(O)—;

R 5 is cycloalkyl, aryl, heteroaryl or heterocyclyl;

wherein said cycloalkyl, aryl, heteroaryl or heterocyclyl are optionally substituted with one, two or three substituents independently selected from the group consisting of C 1-6 alkyl, C 2-4 alkynyl, halo, —NO 2 , cycloalkyl, aryl, heterocyclyl, heteroaryl, —N(R 20 )(R 22 ), —N(R 20 )—S(O) 2 —R 20 , —N(R 20 )—C(O)—R 22 , —C(O)—R 20 , —C(O)—OR 20 , —C(O)—N(R 20 )(R 22 ), —CN and —O—R 20 ;

wherein said C 1-6 alkyl, cycloalkyl, aryl, heterocyclyl or heteroaryl are optionally further substituted with one, two or three substituents independently selected from the group consisting of halo, —NO 2 , C 1-6 alkyl, cycloalkyl, aryl, heterocyclyl, heteroaryl, —N(R 20 )(R 22 ), —C(O)—R 20 , —C(O)—OR 20 , —C(O)—N(R 20 )(R 22 ), —CN and —O—R 20 ; and

wherein said C 1-6 alkyl, cycloalkyl, aryl, heterocyclyl or heteroaryl are optionally further substituted with one, two or three substituents independently selected from the group consisting of halo, aryl, —NO 2 , —CF 3 , —N(R 20 )(R 22 ), —C(O)—R 20 , —C(O)—OR 20 , —C(O)—N(R 20 )(R 22 ), —CN, —S(O) 2 —R 20 and —OR 20 ;

each R 10 is independently selected from the group consisting of halo, —NO 2 , —CN, —SF 5 , —Si(CH 3 ) 3 , —O—R 20 , —S—R 20 , —C(O)—R 20 , —C(O)—OR 20 , —N(R 20 )(R 22 ), —C(O)—N(R 20 )(R 22 ), —N(R 20 )—C(O)—R 22 , —N(R 20 )—C(O)—OR 22 , —N(R 20 —S(O) 2 —R 26 , —S(O) 2 —R 20 , —O—S(O) 2 —R 20 , —S(O) 2 —N(R 20 )(R 22 ), C 1-6 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, cycloalkyl, aryl, heteroaryl and heterocyclyl; and

wherein said C 1-6 alkyl, C 2 - 4 alkenyl, C 2 - 4 alkynyl, cycloalkyl, aryl, heteroaryl or heterocyclyl are optionally substituted with one, two or three substituents independently selected from the group consisting of halo, —NO 2 , aryl, heterocyclyl, heteroaryl, C 1-3 haloalkyl, C 1-6 alkyl, cycloalkyl, —N(R 20 )(R 22 ), —C(O)R 20 , —C(O)—OR 20 , —C(O)—N(R 20 )(R 22 ), —CN and —O—R 20 ;

R 7 is hydrogen, halo or C 1-6 alkyl;

R 20 and R 22 are in each instance independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl;

wherein the C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are optionally substituted with one, two or three substituents independently selected from the group consisting of hydroxyl, halo, C 1-4 alkyl, acylamino, oxo, —NO 2 , —S(O) 2 R 26 , —CN, C 1-3 alkoxy, —CF 3 , —OCF 3 , —OCH 2 CF 3 , —C(O)—NH 2 , aryl, cycloalkyl and heteroaryl; and

wherein said heteroaryl is optionally further substituted with C 1-4 alkyl or cycloalkyl; or

when R 20 and R 22 are attached to a common nitrogen atom R 20 and R 22 may join to form a heterocyclic or heteroaryl ring which is then optionally substituted with one, two or three substituents independently selected from the group consisting of hydroxyl, halo, C 1-4 alkyl, aralkyl, aryloxy, aralkyloxy, acylamino, —NO 2 , —S(O) 2 R 26 , —CN, C 1-3 alkoxy, —CF 3 , —OCF 3 , aryl, heteroaryl and cycloalkyl; and

each R 26 is independently selected from the group consisting of hydrogen, C 1-4 alkyl, aryl and cycloalkyl;

wherein the C 1-4 alkyl, aryl and cycloalkyl may be further substituted with from 1 to 3 substituents independently selected from the group consisting of hydroxyl, halo, C 1-4 alkoxy, —CF 3 and —OCF 3 ;

or a pharmaceutically acceptable salt, ester, stereoisomer, mixture of stereoisomers or tautomer thereof.

2. The compound of claim 1 , wherein R 2 is

3. The compound of claim 1 , wherein n is 0 or 1; and R 10 is 4-trifluoromethyl or 4-trifluoromethoxy.

4. A compound selected from the group consisting of:

4-benzyl-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazepin-5(2H)-one (XII-1)

4-benzyl-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[2,3-f][1,4]oxazepin-5(2H)-one (XII-2)

4-benzyl-7-(4-(trifluoromethyl)phenyl)-3,4-dihydropyrido[2,3-f][1,4]oxazepin-5(2H)-one (XII-3)

4-(pyrimidin-2-ylmethyl)-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazepin-5(2H)-one (XII-5)

4-((4-methylpyrimidin-2-yl)methyl)-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazepin-5(2H)-one (XII-8)

4-(cyclopropylmethyl)-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazepin-5(2H)-one (XII-9)

4-((3-methoxypyridin-2-yl)methyl)-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazenin-5(2H)-one (XII-10)

4-((3-fluoropyridin-2-yl)methyl)-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazepin-5(2H)-one (XII-11)

 and

4-((4-methoxypyrimidin-2-yl)methyl)-7-(4-(trifluoromethoxy)phenyl)-3,4-dihydropyrido[4,3-f][1,4]oxazepin-5 (2H)-one (XII-14)

or a pharmaceutically acceptable salt, ester, stereoisomer, mixture of stereoisomers or tautomer thereof.

5. The compound of claim 1 , wherein n is 0 or 1;

R 10 is —O—R 20 or C 1-4 alkyl;

wherein the alkyl is optionally substituted with three halo; and

R 20 is C 1 —C 15 alkyl; and wherein the alkyl is optionally substituted with one, two or three halo.

6. The compound of claim 1 , wherein R 2 is —C 1-6 alkylene-R 5 or -C 1-6 alkylene-L-C 1-6 alkylene-R 5 .

7. The compound of claim 1 , wherein each —C 1-6 alkylene of R 2 is unsubstituted.

8. The compound of claim 1 , wherein R 5 is cycloalkyl, aryl or heteroaryl;

wherein said heteroaryl is optionally substituted with one, two or three substituents independently selected from the group consisting of C 1-6 alkyl, halo and —O—R 20 .

9. A pharmaceutical composition comprising a pharmaceutically acceptable excipient and a therapeutically effective amount of the compound of claim 1 or a pharmaceutically acceptable salt, thereof.

10. A method of treating a disease state in a human that is alleviable by treatment with an agent capable of reducing late sodium current, comprising administering to a human in need thereof a therapeutically effective dose of a compound of claim 1 .

11. The method of claim 10 , wherein the disease state is a cardiovascular disease selected from one or more of atrial arrhythmias, ventricular arrhythmias, heart failure, diastolic heart failure, systolic heart failure, acute heart failure, stable angina, unstable angina, exercise induced angina, congestive heart disease, ischemia, recurrent ischemia, reperfusion injury, myocardial infarction, acute coronary syndrome, peripheral arterial disease, pulmonary hypertension and intermittent claudication.

12. The method of 10 , wherein the disease state is diabetes or diabetic peripheral neuropathy.

13. The method of 10 , wherein the disease state results in one or more of neuropathic pain, epilepsy, migraine, seizures or paralysis.