SUBSTITUTED PYRR0LIDIN-2-0NES , PIPERIDIN-2-0NES AND ISOTHIAZOLIDINE-1, 1-DIOXIDES, THEIR USE AS KV1 .5 POTASSIUM CHANNEL BLOCKERS AND PHARMACEUTICAL PREPARATIONS COMPRISING THEM

摘要

Substituted pyrrolidin-2-ones, piperidin-2-ones and isothiazolidine-1,1-dioxides (I) are new. Substituted pyrrolidin-2-ones, piperidin-2-ones and isothiazolidine-1,1-dioxides of formula (I) and their salts or trifluoroacetates are new. A : C, S or S=O; n : 0 - 3; R 1phenyl, pyridyl, thienyl, naphthyl, quinolinyl, pyrimidinyl, pyrazinyl (all optionally substituted by mono- - tri-substituents selected from F, Cl, Br, I, CN, 1-4C alkoxy, OCF 3, methylsulfonyl, CF 3, 1-4C alkyl, dimethylamino, sulfamoyl, acetyl or methylsulfonylamino) or 3-7C cycloalkyl; R 2phenyl, pyridyl, thienyl, naphthyl, quinolinyl, pyrimidinyl or pyrazinyl (all optionally substituted by mono- - tri-substituents selected from F, Cl, Br, I, CN, COOMe, CONH 2, 1-4C alkoxy, OCF 3, OH, methylsulfonyl, CF 3, 1-4C alkyl, dimethylamino, sulfamoyl, acetyl or methylsulfonylamino); R 3C pH 2p-R 8; p : 0 - 5; R 8phenyl, pyridyl (both optionally substituted by mono- - tri-substituents selected from F, Cl, Br, I, CF 3, OCF 3, CN, COOMe, CONH 2, COMe, OH, 1-4C alkyl, 1-4C alkoxy, dimethylamino, sulfamoyl, methylsulfonyl or methylsulfonylamino), CH 3, CH 2F, CHF 2, CF 3, 3-7C cycloalkyl, Ctriple boundCH, Ctriple boundC-CH 3 or 1-4C alkoxy; R 4 and R 5H or 1-3C alkyl; and R 6 and R 7H, F or 1-3C alkyl. An independent claim is included for a pharmaceutical preparation comprising the substituted pyrrolidin-2-ones, piperidin-2-ones and isothiazolidine-1,1-dioxides (I) and beta blocker or potassium channel (IKs) channel blocker as active ingredients, carriers and additives. [Image] ACTIVITY : Antiarrhythmic; Respiratory-Gen.; Neuroprotective; Cytostatic; Dermatological; CNS-Gen.; Nootropic; Antiparkinsonian; Anticonvulsant; Cardiant. MECHANISM OF ACTION : Human potassium channel (hKv1.5) blocker; Acetycholine-dependent potassium channel (KACh) blocker; Potassium channel subfamily K member 1 (TASK-1) blocker. The efficacy of 1-[(1S,2R)-2-cyclopropylmethoxy-1-(4-fluoro-phenyl)-2-naphthalen-1-yl-ethyl]-pyrrolidin-2-one (Ia) was evaluated for human potassium channel (hKv1.5) blocker activity. Human Kv1.5 channels were expressed in xenopus oocytes. The oocytes were isolated from Xenopus laevis and defolliculated. The Kv1.5-encoding RNA synthesized in vitro was then injected into these oocytes. After Kv1.5 protein expression for 1 - 7 days, Kv1.5 currents were measured on the oocytes using the two- microelectrode voltage clamp technique. The Kv1.5 channels were activated with voltage jumps. A composition (containing sodium chloride (96 mM), potassium chloride (2 mM), calcium chloride (1.8 mM), magnesium chloride (1 mM), 4-(2-hydroxyethyl)-1-piperazine ethanesulfonic acid (HEPES) (5 mM)) flowed through the bath. (Ia) Was added to the bath solution and IC 50 value was measured. (Ia) Showed an IC 50 value of 0.2 mu M.