Patent ID: 7803802

Claim:
A compound having the structural formula or a pharmaceutically acceptable salt thereof, wherein R 2 is hydrogen or alkyl; R 3 is phenylene; R 4 is —C(O)-alkyl, —C(O)Oethyl, alkyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl, alkoxyalkyl, heterocyclyl, heterocyclylalkyl, heteroaralkyl or heteroaryl; R 6 is each R 7 is independently selected from hydrogen, —OH, alkyl, cycloalkyl, aryl, heteroaryl, aralkyl, heteroaralkyl, aralkoxy, heteroaralkoxy and alkoxy; and X is a bond connecting R 3 and R 4 , or, alternatively, X is —O—, —S—, alkylene, -alkyleneNH—, -alkyleneNHC(O)—, -alkyleneNHSO 2 —, —NH—, —NHC(O)—, or —NHSO 2 —; wherein each alkyl is optionally substituted with 1 to 3 moieties selected from the group consisting of halo, alkyl, aryl, cycloalkyl, cyano, hydroxy, alkoxy, alkylthio, amino, —NH(alkyl), —NH(cycloalkyl), —N(alkyl) 2 , carboxy and —C(O)O-alkyl; and wherein each phenylene, heterocyclylalkyl, cycloalkyl, cycloalkylalkyl, aryl, heteroaryl, heterocyclyl, aralkyl, heteroaralkyl, aralkoxy or heteroaralkoxy is optionally substituted with 1 to 4 moieties selected from the group consisting of —CF 3 , alkyl, alkenyl, alkynyl, aryl, heteroaryl, aralkyl, alkylaryl, heteroaralkyl, arylalkenyl, heteroarylalkenyl, arylalkynyl, heteroarylalkynyl, alkylheteroaryl, hydroxy, hydroxyalkyl, alkoxy, aryloxy, aralkoxy, acyl, aroyl, halo, nitro, cyano, carboxy, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, alkylsulfonyl, arylsulfonyl, heteroarylsulfonyl, alkylthio, arylthio, heteroarylthio, aralkylthio, heteroaralkylthio, cycloalkyl, heterocyclyl, —C(═N—CN)—NH 2 , —C(═NH)—NH 2 , —C(═NH)—NH(alkyl), Y 1 Y 2 N—, Y 1 Y 2 NC(O)—, Y 1 Y 2 NSO 2 — and —SO 2 NY 1 Y 2 , wherein Y 1 and Y 2 can be the same or different and are independently selected from the group consisting of hydrogen, alkyl, aryl, cycloalkyl, —C(O)alkyl and aralkyl, with the proviso that cycloalkyl, cycloalkylene, heterocyclyl and heterocyclylene can be substituted with ═O, wherein: “heteroaryl” means a moiety selected from pyridyl, pyrazinyl, furanyl, thienyl, pyrimidinyl, isoxazolyl, isothiazolyl, oxazolyl, thiazolyl, pyrazolyl, furazanyl, pyrrolyl, pyrazolyl, triazolyl, 1,2,4-thiadiazolyl, pyrazinyl, pyridazinyl, quinoxatinyl, phthalazinyl, imidazo[1,2-a]pyridinyl, imidazo[2,1-b]thiazolyl, benzofurazanyl, indolyl, azaindolyl, benzimidazolyl, benzothienyl, quinolinyl, imidazolyl, thienopyridyl, quinazolinyl, thienopyrimidyl, pyrrolopyridyl, imidazopyridyl, isoquinolinyl, benzoazaindolyl, 1,2,4-triazinyl, and benzothiazolyl; and “heterocyclyl” (or “heterocycloalkyl”) means a moiety selected from piperidyl, pyrrolidinyl, pyrazolidinyl, imidazolinyl, piperazinyl, morpholinyl, thiomorpholinyl, dithianyl, trithianyl, thiazolidinyl, 1,3-dioxolanyl, 1,4-dioxanyl, tetrahydrofuranyl, tetrahydrothiophenyl, and tetrahydrothiopyranyl.