Synthesis of 4-(Cyanomethylidene)- and 4-(Ethoxycarbonylmethylidene)-4,5,6,7-tetrahydroindoles and Their Dehydrogenation to 4-(Cyanomethyl)- and 4-(Ethoxycarbonylmethyl)indoles
The present invention relates to a compound of formula I: or a pharmaceutically acceptable salt thereof, wherein the symbols are as defined in the specification; a pharmaceutical composition comprising the same, a method for treating or preventing a viral infection such as HIV using the same.