Ether substituted imidazopyridines

A compound of the formula (I-6):

• wherein:
• X is —CH(R5)—, —CH(R5)-alkylene-, —CH(R5)-alkenylene-, or CH(R5)-alkylene-Y-alkylene-;
• R1-6 is selected from the group consisting of:
• -alkyl;
• -aryl;
• -heteroaryl;
• -heterocyclyl;
• -alkenyl;
• -R6-aryl;
• -R6-heteroaryl;
• -R6-heterocyclyl;
• R2 is selected from the group consisting of:
• -hydrogen;
• -alkyl;
• -alkenyl;
• -aryl;
• -heteroaryl;
• -heterocyclyl;
• -alkylene-Y-alkyl;
• -alkylene-Y-alkenyl;
• -alkylene-Y-aryl;
• and
• -alkyl or alkenyl substituted by one or more substituents selected from the group consisting of:
• —OH;
• -halogen;
• N(R5)2;
• —C(O)—C1-10 alkyl;
• —C(O)—O—C1-10 alkyl;
• —N3;
• -aryl;
• -heteroaryl;
• -heterocyclyl;
• —C(O)-aryl;
• and
• —C(O)-heteroaryl;
• Y is —O— or —S(O)0-2—;
• R3 and R4 are independently selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, C1-10 alkylthio, amino, alkylamino, dialkylamino, halogen, and nitro;
• each R5 is independently hydrogen, C1-10 alkyl, or C2-10 alkenyl;
• and
• R6 is alkylene, alkenylene, or alkynylene, which may be interrupted by one or more —O— atoms;
• or a pharmaceutically acceptable salt thereof.