Derivatives and methods of treating hepatitis B infections

A compound of Formula III:

• or a pharmaceutically acceptable salt thereof, wherein
• Y is —C(O)—;
• R1 is C6-C12-aryl or C1-C9-heteroaryl wherein aryl and heteroaryl are optionally substituted with 1 or 2 groups each independently selected from —OH, halo, C1-C6-alkyl, C1-C6-haloalkyl, —O—C1-C6-alkyl, C1-C6-alkyl-OH, CN, and C(O)H;
• R2 is, at each occurrence, independently selected from H, —OH, halo, C1-C6-alkyl, C1-C6-haloalkyl, —O—C1-C6-alkyl, and C1-C6-alkyl-OH, provided that at least one R2 is selected from —OH, halo, C1-C6-alkyl, C1-C6-haloalkyl, —O—C1-C6-alkyl, and C1-C6-alkyl-OH;
• R3 is selected from H, —OH, halo, C1-C6-alkyl, C1-C6-haloalkyl, —O—C1-C6-alkyl, and C1-C6-alkyl-OH;
• R4 is selected from
• and
• R7 is selected from H, C1-C6-alkyl, and C1-C6-alkyl-OH.