The present invention provides compounds for treating or preventing an HIV infection, or treating AIDS or ARC comprising administering a compound according to formula I where Ar, R
1
-R
5
, R
11c
and X
1
are as defined herein.
This invention relates to methods of treating an HIV infection with novel heterocyclic compounds of formula I wherein R
1
—R
4
, X
1
and X
2
are as defined in the summary and pharmaceutically acceptable salts, and methods to inhibit or modulate Human Immunodeficiency Virus (HIV) reverse transcriptase with compounds of formula I.
The present invention provides compositions for treating an HIV infection comprising administering a compound according to formula I where Ar, R
1
-R
5
, R
11c
and X
1
are as defined herein with at least one carrier, excipient or diluent.