Quinoline and quinazoline amides as modulators of sodium channels

A compound of formula I

• or a pharmaceutically acceptable salt thereof,
• wherein, independently for each occurrence:
• Y is C or N;
• Ar1 is a 5-6 membered aromatic monocyclic ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein said ring is optionally fused to a 5-membered monocyclic aromatic ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Ar1 has m substituents, each independently selected from —WRW;
• m is an integer from 0 to 5 inclusive;
• W is a bond or C1-C6 alkyl wherein said C1-C6 alkyl is substituted with 0-6 halogen, wherein up to two non-adjacent CH2 units of said C1-C6 alkyl may be replaced with —O—, —CO—, —S—, —SO—, or —SO2—;
• RW is absent, H, halogen, OH, NH2, NHR′, NO2, CN, CF3, OCF3, or a 3-6 membered saturated, partially unsaturated, or fully unsaturated monocyclic ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur;
• R′ is C1-C6 alkyl;
• R1 is H, halogen, CN, or C1-C6 alkyl wherein said C1-C6 alkyl is substituted with 0-6 halogen and wherein up to two non-adjacent CH2 units of said C1-C6 alkyl may be replaced with —O—;
• R2 is H, halogen, CN, or C1-C6 alkyl wherein said C1-C6 alkyl is substituted with 0-6 halogen, wherein up to two non-adjacent CH2 units of said C1-C6 alkyl may be replaced with —O—;
• R3 is H, halogen, CN, or C1-C6 alkyl wherein said C1-C6 alkyl is substituted with 0-6 halogen, wherein up to two non-adjacent CH2 units of said C1-C6 alkyl may be replaced with —O—;
• R4 is H, halogen, CN, or C1-C6 alkyl wherein said C1-C6 alkyl is substituted with 0-6 halogen, wherein up to two non-adjacent CH2 units of said C1-C6 alkyl may be replaced with —O—;
• R5 is H, halogen, CN, or —X—RX;
• R5′ is H, halogen, CN, or —X—RX;
• R6 is H, halogen, CN, or —X—RX;
• R6′ is H, halogen, CN, or —X—RX;
• R7 is H, halogen, CN, or —X—RX;
• X is a bond or C1-C6 alkyl wherein said C1-C6 alkyl is substituted with 0-6 halogen, wherein up to two non-adjacent CH2 units of said C1-C6 alkyl may be replaced with —O—;
• and
• RX is absent, H, or C3-C8 cycloaliphatic, wherein up to two non-adjacent CH2 units of said C3-C8 cycloaliphatic may be replaced with —O— and said C3-C8 cycloaliphatic is substituted with 0-3 substituents selected from halogen and C1-C4 alkyl.