EP2406229A1 - Substituierte 2-mercaptochinolin-3-carboxamide als kcnq2/3 modulatoren - Google Patents

Substituierte 2-mercaptochinolin-3-carboxamide als kcnq2/3 modulatoren

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Publication number
EP2406229A1
EP2406229A1 EP10708726A EP10708726A EP2406229A1 EP 2406229 A1 EP2406229 A1 EP 2406229A1 EP 10708726 A EP10708726 A EP 10708726A EP 10708726 A EP10708726 A EP 10708726A EP 2406229 A1 EP2406229 A1 EP 2406229A1
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EP
European Patent Office
Prior art keywords
alkyl
methyl
quinoline
carboxamide
ethylsulfanyl
Prior art date
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EP10708726A
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German (de)
English (en)
French (fr)
Inventor
Sven KÜHNERT
Gregor Bahrenberg
Achim Kless
Wolfgang Schröder
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Gruenenthal GmbH
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Gruenenthal GmbH
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/47—Quinolines; Isoquinolines
    • A61K31/4709—Non-condensed quinolines and containing further heterocyclic rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/04—Centrally acting analgesics, e.g. opioids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/06—Antimigraine agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/08—Antiepileptics; Anticonvulsants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/22—Anxiolytics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/30—Drugs for disorders of the nervous system for treating abuse or dependence
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
    • C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
    • C07D215/16—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D215/48—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
    • C07D215/54—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen attached in position 3

Definitions

  • the invention relates to substituted 2-mercaptoquinoline-3-carboxamides, processes for their preparation, medicaments containing these compounds and the use of these compounds for the preparation of medicaments.
  • K + channels of the molecular subtype KCNQ2 / 3 (Kv7.2 / 7.3) are expressed in neurons of different regions of the central (hippocampus, amygdala) and peripheral (dorsal root ganglia) nervous system and regulate their excitability. Activation of KCNQ2 / 3 K + channels leads to hyperpolarization of the cell membrane and concomitant decrease in the electrical excitability of these neurons.
  • KCNQ2 / 3-expressing neurons of the dorsal root ganglia are involved in the transmission of nociceptive excitations from the periphery to the spinal cord (Passmore et al., J Neurosci., 2003; 23 (18) 7227-36).
  • the KCNQ2 / 3 agonist retigabine has demonstrated analgesic efficacy in preclinical neuropathy and inflammatory pain models (Blackburn-Munro and Jensen, Eur J Pharmacol., 2003; 460 (2-3): 109-16; Dost et al., Naunyn Schmiedeberg's Arch Pharmacol 2004; 369 (4): 382-390).
  • the KCNQ2 / 3 K + channel thus provides a suitable starting point for the treatment of pain; in particular pain selected from the group consisting of chronic pain, neuropathic pain, inflammatory pain and muscular pain (Nielsen et al., Eur J Pharmacol. 2004; 487 (1-3): 93-103), especially neuropathic and inflammatory pain represents.
  • the KCNQ2 / 3 K + channel is a suitable target for the therapy of a variety of other diseases such as migraine (US2002 / 0128277), cognitive disorders (Gribkoff, Expert Opin Ther Targets 2003; 7 (6): 737-748), Anxiety states (Korsgaard et al., J Pharmacol Exp Ther.
  • the compounds show a high selectivity towards other receptors of the KCNQ family (specificity), for example against KCNQ1, KCNQ3 / 5 or KCNQ4.
  • High selectivity can have a favorable effect on the side effect profile.
  • compounds which (also) bind to KCNQ1 bring with them a high risk of cardiac side effects, and therefore high selectivity to KCNQ1 may be desirable.
  • high selectivity may also be advantageous over other receptors.
  • a low affinity for the hERG ion channel or for the L-type calcium ion channel may be advantageous, since these receptors in
  • An object of the invention was therefore to provide new compounds which have advantages over the compounds of the prior art.
  • the compounds should be particularly useful as pharmacologically active agents in medicaments, preferably in medicaments for the treatment of disorders or diseases mediated at least in part by KCNQ2 / 3K + channels.
  • Substituted quinolinyl compounds which are suitable as inhibitors of the hYAK1 and hYAK3 kinases are known from the prior art (WO 02/081728 A2). Furthermore, 4-hydroxyquinoline-3-carboxylic acid derivatives are known as light stabilizers (EP 0 900 824 A1). It has surprisingly been found that substituted 2-mercaptoquinoline-3-carboxamides of the general formula (1) given below are suitable for the treatment of pain. It has further been found, surprisingly, that substituted 2-mercaptoquinoline-3-carboxamides of the general formula (1) given below also have an excellent affinity for the KCNQ2 / 3K + channel and are therefore suitable for the treatment of disorders or diseases which are at least partially KCNQ2 / 3 K + channels. The substituted 2-mercaptoquinoline-3-carboxamides act as modulators, ie agonists or antagonists, of the KCNQ2 / 3K + channel.
  • An object of the invention are substituted 2-mercaptoquinoline-3-carboxamides of the general formula (1)
  • R 0 is C M o-alkyl or C 2- io-heteroalkyl, in each case saturated or unsaturated, branched or unbranched, unsubstituted or mono- or polysubstituted; C 3-10 cycloalkyl or heterocyclyl, in each case saturated or unsaturated, unsubstituted or monosubstituted or polysubstituted; Aryl or heteroaryl, in each case unsubstituted or monosubstituted or polysubstituted; about Ci -8 alkyl or C 2-8 heteroalkyl bridged C 3 -io cycloalkyl or heterocyclyl, substituted saturated or unsaturated, unsubstituted or mono- or polysubstituted, where the alkyl or heteroalkyl chain branched or unbranched, in each case saturated or unsaturated, unsubstituted, monosubstituted or polysubstituted; or Ci -8 alkyl or C
  • R 6 is R 0 ; with the proviso that when R 0 heterocyclyl, saturated or unsaturated, is unsubstituted or monosubstituted or polysubstituted; or heteroaryl, unsubstituted or monosubstituted or polysubstituted; the bond of the heteroaryl or heterocyclyl is via a carbon atom of the heteroaryl or heterocyclyl;
  • alkyl or "CMo-alkyl”
  • M is C 1-8 -alkyl "and" C 1-4 -alkyl "for the purposes of this invention include acyclic saturated or unsaturated aliphatic hydrocarbon radicals which are branched or unbranched and unsubstituted or - or may be substituted several times, with 1 to 10 or 1 to 8 or 1 to 4 C atoms, ie Ci-1 0 -Alkanyle, C 2- io-alkenyls and C ⁇ -io-alkynyls or Ci- 8 -Alkanyle, C 2- 8-alkenyls and C2-8 alkynyls or Ci -4 -Alkanyle, C2-4 alkenyls and C2-4 alkynyls.
  • alkenyls have at least one C-C double bond and alkynyls at least
  • the heteroatom groups NH and N (Ci -8- alkyl) of the heteroalkyl may be monosubstituted or polysubstituted.
  • C 2-10 -Heteroalkenyle and C 2- 8-Heteroalkenyle have at least one C-C or CN double bond
  • C io-2- Heteroalkinyle C and the second 8 - Heteroalkynyls have at least one C-C triple bond.
  • cycloalkyl or "C 3-10 cycloalkyl” for the purposes of this invention means cyclic aliphatic hydrocarbons having 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms wherein the hydrocarbons are saturated or unsaturated (but not aromatic), unsubstituted or monosubstituted or polysubstituted.
  • the bonding of the cycloalkyl to the respective general structure above can take place via any and possible ring member of the cycloalkyl radical.
  • the cycloalkyl radicals can also be condensed with further saturated, (partially) unsaturated, (hetero) cyclic, aromatic or heteroaromatic ring systems, ie with cycloalkyl, heterocyclyl, aryl or heteroaryl, which in turn may be unsubstituted or monosubstituted or polysubstituted.
  • the cycloalkyl radicals can furthermore be mono- or polysubstituted, for example in the case of adamantyl, bicyclo [2.2.1] heptyl or bicyclo [2.2.2] octyl.
  • Cycloalkyl is preferably selected from the group consisting of cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, adamantyl,
  • heterocyclyl or “heterocycloalkyl” embraces aliphatic saturated or unsaturated (but not aromatic) cycloalkyls having three to ten, ie 3, 4, 5, 6, 7, 8, 9 or 10 ring members in which at least one, if appropriate also two or three carbon atoms by a heteroatom or a heteroatom group each independently selected from the group consisting of O 1 S, N, NH and N (Ci -8 alkyl), preferably N (CH 3 ) are replaced, wherein the ring members unsubstituted or mono- or polysubstituted.
  • heterocyclyl radicals may also be condensed with further saturated, (partially) unsaturated (hetero) cyclic or aromatic or heteroaromatic ring systems, ie with cycloalkyl, heterocyclyl, aryl or heteroaryl, which in turn may be unsubstituted or monosubstituted or polysubstituted.
  • heterocyclyl radicals from the group comprising azetidinyl, aziridinyl, azepanyl, azocanyl, diazepanyl, dithiolanyl, dihydroquinolinyl, dihydropyrrolyl, dioxanyl, dioxolanyl, dihydroindenyl, dihydropyridinyl, dihydrofuranyl, dihydroisoquinolinyl, dihydroindolinyl, dihydroisoindolyl, imidazolidinyl, isoxazolidinyl, morpholinyl, oxiranyl, oxetanyl, Pyrrolidinyl, piperazinyl, piperidinyl, pyrazolidinyl, pyranyl, tetrahydropyrrolyl, tetrahydropyranyl, tetrahydroquinolinyl, tetrahydroiso
  • aryl in the context of this invention means aromatic hydrocarbons having up to 14 ring members, including phenyls and naphthyls.
  • Each aryl radical can be unsubstituted or monosubstituted or polysubstituted, where the aryl substituents can be the same or different and in any desired and possible position of the aryl.
  • the attachment of the aryl to the general structure above can take place via any and possible ring member of the aryl radical.
  • aryl radicals can also be condensed with further saturated, (partially) unsaturated, (hetero) cyclic, aromatic or heteroaromatic ring systems, ie with cycloalkyl, heterocyclyl, aryl or heteroaryl, which in turn may be unsubstituted or monosubstituted or polysubstituted.
  • fused aryl radicals are benzodioxolanyl and benzodioxanyl.
  • Aryl is preferably selected from the group which contains phenyl, 1-naphthyl and 2-naphthyl, which may each be unsubstituted or monosubstituted or polysubstituted.
  • a particularly preferred aryl is phenyl, unsubstituted or monosubstituted or polysubstituted.
  • heteroaryl represents a 5- or 6-membered cyclic aromatic radical containing at least 1, optionally also 2, 3, 4 or 5 heteroatoms, wherein the heteroatoms are each independently selected from the group S, N and O and the heteroaryl radical may be unsubstituted or mono- or polysubstituted; in the case of heteroaryl substitution, the substituents may be the same or different and may be in any and possible position of the heteroaryl.
  • the binding to the general structure above can take place via any and possible ring member of the heteroaryl radical.
  • the heteroaryl may also be part of a bi- or polycyclic system having up to 14 ring members, which ring system may be formed with further saturated, (partially) unsaturated, (hetero) cyclic or aromatic or heteroaromatic rings, i. with cycloalkyl, heterocyclyl, aryl or heteroaryl, which in turn may be unsubstituted or monosubstituted or polysubstituted.
  • heteroaryl moiety is selected from the group consisting of benzofuranyl, benzoimidazolyl, benzothienyl, benzothiadiazolyl, benzothiazolyl, benzotriazolyl, benzooxazolyl, benzooxadiazolyl, quinazolinyl, quinoxalinyl, carbazolyl, quinolinyl, dibenzofuranyl, dibenzothienyl, furyl (furanyl), imidazolyl , Imidazothiazolyl, indazolyl, indolizinyl, indolyl, isoquinolinyl, isoxazoyl, isothiazolyl, indolyl, naphthyridinyl, oxazolyl, oxadiazolyl, phenazinyl, phenothiazinyl, phthaloyl, pyrazolyl, pyridyl (2-pyridyl, 3-
  • Heterocyclyl or cycloalkyl "mean in the sense of the invention that Ci -4 alkyl or Ci- ⁇ -alkyl and aryl or heteroaryl or heterocyclyl and cycloalkyl are as defined above and the aryl or heteroaryl or heterocyclyl, or cycloalkyl radical via a C- ⁇ -4 -alkyl or a d- ⁇ -alkyl group to the respective parent general structure is bound.
  • the alkyl chain can in all cases be saturated or unsaturated, branched or unbranched, unsubstituted or monosubstituted or polysubstituted.
  • aryl, heteroaryl, heterocyclyl or cycloalkyl bridged by C 2 ⁇ -heteroalkyl mean that C 2-8 -heteroalkyl and aryl or heteroaryl or heterocyclyl or cycloalkyl have the meanings defined above and Aryl or heteroaryl or heterocyclyl or cycloalkyl radical is bonded via a C 2-8 heteroalkyl group to the respective parent general structure.
  • the heteroalkyl chain may in all cases be saturated or unsaturated, branched or unbranched, unsubstituted or monosubstituted or polysubstituted.
  • terminal carbon atom By the terminal carbon atom is meant the carbon atom within the C 2-8 heteroalkyl which is furthest within the chain from the respective general parent structure. Is the terminal carbon atom of a C 2-8 heteroalkyl, for example, by an N (CH 3 ) - Group is replaced, this is within the C 2-8 heteroalkyl furthest removed from the general parent structure and bound to the aryl or heteroaryl or heterocyclyl or cycloalkyl radical.
  • C 2-8 heteroalkyl is selected from the group comprising -CH 2 -NH-, -CH 2 -N (CH 3 ) -, -CH 2 -O-, -CH 2 - CH 2 -NH-, -CH 2 -CH 2 -N (CH 3 ) -, -CH 2 -CH 2 -O-, -CH 2 -CH 2 -CH 2 -NH-, -CH 2 -CH 2 -CH 2 -CH 2 -NH-, -CH 2 -CH 2 -CH 2 -CH 2 -
  • Substituents are selected from the group consisting of F; Cl; Br; I; NO 2 ; CF 3 ;
  • aryl and “heteroaryl” substituents are selected from the group consisting of F; Cl; Br; I; NO 2 ; CF 3 ; CN; Ci -8- alkyl; or C 2-8 - heteroalkyl; aryl; heteroaryl; C 3-10 cycloalkyl; heterocyclyl; Ci -8- alkyl or C 2-8 -
  • Heteroalkyl bridged aryl, heteroaryl, C 3- i 0 cycloalkyl or heterocyclyl; CHO;
  • Ci.io-alkyl may in turn be substituted again, for example with Cl (substituent of the 3rd generation). This results in a total of the functional group aryl-NHCi-io-alkyl-CI.
  • the 3rd generation substituents may not be substituted again, i. then there are no 4th generation substituents.
  • the substituents of the second generation can not be substituted again, ie there are already no substituents of the 3rd generation.
  • the functional groups for R 0 to R 7 may each be optionally substituted, but the respective substituents may not be substituted again in turn.
  • the compounds of the invention are defined by substituents which represent or carry an aryl or heteroaryl radical, each unsubstituted or monosubstituted or polysubstituted, or which together with the or the carbon or heteroatom (s) connecting them as a ring member or as ring members form a ring, for example an aryl or heteroaryl, in each case unsubstituted or monosubstituted or polysubstituted.
  • Both these aryl or heteroaryl radicals as well as aromatic ring systems thus formed may be saturated or unsaturated, condensed with C3-i0 cycloalkyl, or heterocyclyl optionally, ie with a C 3 .io-cycloalkyl such as cyclopentyl or a heterocyclyl such as morpholinyl, wherein the thus condensed C 3 -io-cycloalkyl or heterocyclyl radicals may in each case be unsubstituted or monosubstituted or polysubstituted.
  • compounds of the invention are defined by substituents, which are a C 3 -i 0 cycloalkyl or heterocyclyl radical, or carry, in each case unsubstituted or mono- or polysubstituted, or (together with the or the linking carbon atom or heteroatom en) form a ring as a ring member or as ring members, for example a C 3-10 cycloalkyl or heterocyclyl, in each case unsubstituted or monosubstituted or polysubstituted.
  • substituents are a C 3 -i 0 cycloalkyl or heterocyclyl radical, or carry, in each case unsubstituted or mono- or polysubstituted, or (together with the or the linking carbon atom or heteroatom en) form a ring as a ring member or as ring members, for example a C 3-10 cycloalkyl or heterocyclyl, in each case unsubstituted or monosubstitute
  • Both these C 3 i 0 cycloalkyl or heterocyclyl radicals as well as the aliphatic ring systems formed may be condensed with aryl or heteroaryl optionally, ie with an aryl such as phenyl or a heteroaryl such as pyridyl, wherein the aryl or heteroaryl fused so
  • radicals can each be unsubstituted or monosubstituted or polysubstituted.
  • the compounds of the invention are defined by radicals within which two substituents are represented by the general term "(" Substituent 1 "or” Substituent 2 "or” Substituent 3 "). This term means that "Substituent 1" and “Substituent 2" and “Substituent 3" can occur within such a residue in any possible combination.
  • the expression "(R 0 or H)" within a moiety means that R 0 and H within this residue may occur in any possible combination, for example, the radical “N (R 0 or H) 2 " may represent “NH 2 ", “NHR 0 " and “N (R °) 2 " 0, as in the case of "N (R °) 2 " occurs several times within a residue, then R 0 can each have the same or different meanings: in the present example of "N (R °) 2 ", R 0 can for example be twice for aryl to give the functional group "N (aryl) 2 " or R 0 may be once aryl and once Ci-io-alkyl, whereby the functional group "N (aryl) (Ci-io-alkyl)" results.
  • the symbol used in formulas denotes a linkage of a corresponding remainder to the respective overall general structure.
  • the term salt formed with a physiologically acceptable acid means salts of the respective active ingredient with inorganic or organic acids which are physiologically compatible, in particular when used in humans and / or mammals.
  • Particularly preferred is the hydrochloride.
  • physiologically tolerated acids are: hydrochloric acid, hydrobromic acid, sulfuric acid, methanesulfonic acid, formic acid, acetic acid, oxalic acid, succinic acid, tartaric acid, mandelic acid, fumaric acid, maleic acid, lactic acid, citric acid, glutamic acid, saccharic acid, monomethylsebacic acid, 5-oxoproline, hexane 1-sulfonic acid, nicotinic acid, 2-, 3- or 4-aminobenzoic acid, 2,4,6-trimethylbenzoic acid, ⁇ -lipoic acid, acetylglycine, hippuric acid, phosphoric acid and / or aspartic acid.
  • Physiologically acceptable salts with cations or bases are salts of the respective compound - as an anion with at least one, preferably inorganic, cation, which are physiologically compatible - especially when used in humans and / or mammals.
  • Particularly preferred are the salts of alkali and alkaline earth metals but also ammonium salts, but especially (mono-) or (di) sodium, (mono-) or (di) potassium, magnesium or calcium salts.
  • R 1 , R 2 , R 3 and R 4 are each independently selected from the group consisting of H, F, Cl, CF 3 and OCF 3 .
  • Piperidinyl 4-methylpiperazinyl, piperazinyl or morpholinyl, each unsubstituted; Benzyl, phenyl or pyridyl, each unsubstituted or mono-, di- or tri-substituted with one, two or three substituents each independently selected from the group consisting of F, Cl 1 Br, I 1 CN, Ci -8- alkyl, O-C 8 -alkyl, CF 3 , OH and OCF 3 .
  • R 5 is methyl, OMe or -CH 2 O-methyl.
  • substituent R 6 stands for the following partial structure (T1)
  • n O 1 1, 2, 3 or 4;
  • Y is O or NR 9 ,
  • R 9 is H; Ci -4 alkyl, saturated or unsaturated, branched or unbranched, unsubstituted or mono- or polysubstituted with one or more substituents each independently selected from the group consisting of F, Cl, Br 1 I, C 1-4 alkyl, OH , O-Ci -4 alkyl, OCF 3, NH 2, NH-Ci 4 alkyl, and N (Ci -4 alkyl) 2; stands; or Ca-io-cycloalkyl, saturated or unsaturated, unsubstituted or mono- or polysubstituted with one or more substituents each independently selected from the group consisting of F, Cl, Br, I 1, Ci -4 alkyl, OH, O- Ci -4 alkyl, OCF 3, NH 2, NH-C 1-4 alkyl, and N (C 1-4 alkyl) 2; stands; n is O or 1,
  • n is not 1 if m is 0;
  • R 8a and R 8b are each independently H; F; Cl; Br; I; NO 2 ; CF 3 ; CH 2 CF 3 ; CN; OH; OCF 3 , NH 2 ; Ci -4 alkyl, Od -4 alkyl, O-Ci -4 alkyl-OH, O-Ci -4 alkyl-OCH 3, NH-Ci -4 alkyl, N (Ci -4 alkyl) 2 , in each case saturated or unsaturated, branched or unbranched, unsubstituted; C 3-10 -cycloalkyl, saturated or unsaturated, unsubstituted or monosubstituted or polysubstituted with one or more substituents each independently selected from the group consisting of F, Cl, Br, I 1, C 1-4 -alkyl, OH, O-C 1 - 4- alkyl;
  • n 0, 1, 2, 3 or 4;
  • Y is O or NR 9 ;
  • R 9 is H; Ci -4 alkyl, saturated or unsaturated, unsubstituted; or Cs-1 0 -cycloalkyl, saturated or unsaturated, unsubstituted group;
  • n 0 or 1
  • n is not 1 if m is O;
  • A is C 1-8 alkyl, saturated or unsaturated, branched or unbranched, unsubstituted or mono- or polysubstituted with one or more substituents each independently selected from the group consisting of F, Cl, Br, I, NO 2 , CN, OH , O-Ci -4 alkyl, OCF 3, CF 3, NH 2, NH (Ci -4 alkyl), N (C 1-4 alkyl) 2, SCF 3; C 3 i 0 cycloalkyl or heterocyclyl, in each case saturated or unsaturated, unsubstituted or mono- or polysubstituted more substituents each independently selected from the group consisting of F, Cl, Br, I, NO 2, CN, OH with one or, OC 1-4 alkyl, OCF 3, Ci -4 alkyl, CF 3, NH 2, NH (Ci -4 alkyl), N (C 1-4 alkyl) 2, SCF 3; Aryl or heteroaryl, each unsubstit
  • R 8a and R 8b are each independently H; F;
  • OCF 3 NH 2 ; NH-methyl; N (methyl) 2 ; NH-ethyl; N (ethyl) 2 ; or N (methyl) (ethyl);
  • n 1, 2 or 3;
  • R 8a and R 8b are each independently H; F; Cl; Br; I; Methyl; ethyl; n-propyl; iso-propyl; n-butyl; sec-butyl; tert-butyl; OH; O-methyl; O-ethyl; O- (CH 2 ) 2 -O-CH 3 ; or O- (CH 2 ) 2 -OH;
  • n 1, 2 or 3;
  • n for O; and A is methyl; ethyl; n-propyl; iso-propyl; n-butyl; sec-butyl; tert-butyl;
  • R 8a and R 8b are each independently H
  • alkyl radicals may each be saturated or unsaturated, branched or unbranched, unsubstituted or monosubstituted or polysubstituted with one or more substituents each independently selected from the group consisting of F, Cl, Br, I, OC 1-8 alkyl, OH and OCF 3 ; and wherein the above C 3- I 0 - cycloalkyl or heterocyclyl may be saturated or unsaturated, unsubstituted or mono- or polysubstituted with one or more
  • R 7 stands for
  • Heterocyclyl where the above alkyl radicals may each be saturated or unsaturated, branched or unbranched, unsubstituted or monosubstituted or polysubstituted with one or more substituents each independently selected from the group consisting of F, Cl, Br, I, O-Ci -8- alkyl, OH and OCF 3 ; and wherein the above C 3 I 0 -
  • R 7 is particularly preferably selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, 2-butyl, tert-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, cyclopropyl, cycobutyl, Cyclopentyl, cyclohexyl, methylcyclopropyl, methylcyclobutyl, methylcyclopentyl, methylcyclohexyl, ethylcyclopropyl, ethylcyclobutyl, ethylcyclopentyl, ethylcyclohexyl, each unsubstituted or mono- or polysubstituted with one or more substituents selected from among group consisting of F, Cl, Br, I, OCF 3, SCF 3, CF 3, and OC i -8 alkyl; or
  • R 7 is methyl, ethyl, isopropyl, tert-butyl or cyclopropyl. Particular preference is given to compounds from the group
  • substituted 2-mercaptoquinoline-3-carboxamides according to the invention and in each case the corresponding acids, bases, salts and solvates are suitable as pharmaceutical active ingredients in medicaments.
  • Another object of the invention is therefore a medicament containing at least one inventive substituted 2-mercaptoquinoline-3-carboxamide of the general formula (1), wherein the radicals R 1 -R 7 have the meaning given above and optionally one or more pharmaceutically acceptable excipients ,
  • the medicaments according to the invention optionally contain suitable additives and / or adjuvants, such as carrier materials, fillers, solvents, diluents, dyes and / or binders and can be used as liquid dosage forms in the form of injection solutions, drops or juices, as semisolid Dosage forms in the form of granules, tablets, pellets, patches, capsules, patches / spray patches or aerosols. The choice of excipients etc.
  • the amounts to be used depend on whether the drug is administered orally, perorally, parenterally, intravenously, intraperitoneally, intradermally, intramuscularly, intranasally, buccally, rectally or locally, for example on the skin, mucous membranes or in the mouth the eyes, to be applied.
  • preparations in the form of tablets, dragees, capsules, granules, drops, juices and syrups for parenteral, topical and inhalative administration solutions, suspensions, easily reconstitutable dry preparations and sprays.
  • Compounds according to the invention in a depot, in dissolved form or in a plaster, optionally with the addition of agents which promote skin penetration are suitable percutaneous administration preparations.
  • Orally or percutaneously applicable preparation forms can release the compounds according to the invention with a delay.
  • the compounds of the invention may also be used in parenteral long term depot forms such as implants or implanted pumps. In principle, the inventive
  • Medicaments are added other known to those skilled in other active ingredients.
  • medicaments according to the invention are suitable for influencing KCNQ2 / 3 channels and exert an agonistic or antagonistic, in particular an agonistic action.
  • the medicaments according to the invention are preferably suitable for the treatment of disorders or diseases which are at least partially mediated by KCNQ2 / 3 channels.
  • the medicaments according to the invention are preferably suitable for the treatment of one or more diseases selected from the group consisting of pain, preferably pain selected from the group consisting of acute pain, chronic pain, neuropathic pain, muscular pain and inflammatory pain; Epilepsy, urinary incontinence, anxiety, dependence, mania, bipolar disorder, migraine, cognitive disorders, dystonia-associated dyskinesias and / or urinary incontinence.
  • pain preferably pain selected from the group consisting of acute pain, chronic pain, neuropathic pain, muscular pain and inflammatory pain
  • Epilepsy urinary incontinence
  • anxiety, dependence, mania, bipolar disorder migraine, cognitive disorders, dystonia-associated dyskinesias and / or urinary incontinence.
  • the medicaments according to the invention are particularly preferably suitable for the treatment of pain, very particularly preferably of chronic pain, neuropathic pain, inflammatory pain and muscular pain.
  • the medicaments according to the invention are particularly preferably suitable for the treatment of epilepsy.
  • Another object of the invention is the use of at least one substituted 2-mercaptoquinoline-3-carboxamide invention and optionally one or more pharmaceutically acceptable excipients for the manufacture of a medicament for the treatment of disorders or diseases that are mediated at least partially by KCNQ2 / 3 channels ,
  • the use of at least one substituted 2-mercaptoquinoline-3-carboxamide invention and optionally one or more pharmaceutically acceptable excipients for the manufacture of a medicament for the treatment of pain preferably pain selected from the group consisting of acute pain, chronic pain, neuropathic pain , muscular pain and inflammatory pain; Epilepsy, urinary incontinence, anxiety, dependence, mania, bipolar disorder, migraine, cognitive disorders, dystonia-associated dyskinesias and / or urinary incontinence.
  • Particularly preferred is the use of at least one substituted 2-mercaptoquinoline-3-carboxamide invention and optionally one or more pharmaceutically acceptable excipients for the manufacture of a medicament for the treatment of pain, most preferably of chronic pain, neuropathic pain, inflammatory pain and muscular pain.
  • At least one substituted 2-mercaptoquinoline-3-carboxamide according to the invention and optionally one or more pharmaceutically acceptable excipients for the manufacture of a medicament for the treatment of epilepsy.
  • Another object of the invention is at least one inventive substituted 2-mercaptoquinoline-3-carboxamide and optionally one or more pharmaceutically acceptable excipients for the treatment of disorders or diseases that are mediated at least partially by KCNQ2 / 3 channels.
  • Another object of the invention is at least one inventive substituted 2-mercaptoquinoline-3-carboxamide and optionally one or more pharmaceutically acceptable excipients for the treatment of pain, preferably pain selected from the group consisting of acute pain, chronic pain, neuropathic pain, muscular pain and inflammatory pain; Epilepsy, urinary incontinence, anxiety, dependence, mania, bipolar disorder, migraine, cognitive disorders, dystonia-associated dyskinesias and / or urinary incontinence.
  • At least one substituted 2-mercaptoquinoline-3-carboxamide according to the invention is at least one substituted 2-mercaptoquinoline-3-carboxamide according to the invention and optionally one or more pharmaceutically acceptable excipients for the treatment of pain, most preferably chronic pain, neuropathic pain, inflammatory pain and muscular pain.
  • At least one substituted 2-mercaptoquinoline- ⁇ -carboxamide according to the invention is also particularly preferred.
  • Efficacy against pain can be demonstrated, for example, in the Bennett or Chung model (Bennett, GJ and Xie, YK, A peripheral mononeuropathy in rat that produces disorders of pain sensation like those seen in man, Pain 1988, 33 (1) Kim, SH and Chung, JM, An experimental model for peripheral neuropathy produced by segmental spinal nerve ligation in the rat, Pain 1992, 50 (3), 355-363).
  • Efficacy against epilepsy can be demonstrated, for example, in the DBA / 2 mouse model (De Sarro et al., Naunyn-Schmiedeberg's Arch. Pharmacol., 2001, 363, 330-336).
  • substituted 2-mercapto-quinoline-3-carboxamides of the invention have an EC 5 o value of at most 10 microns or at most 5 microns, preferably at most 3 microns or at most 2 microns, more preferably at most 1, 5 uM or up to 1 uM , most preferably at most 0.8 ⁇ M or at most 0.5 ⁇ M and in particular at most 0.4 ⁇ M or at most 0.2 ⁇ M.
  • Methods for determining the EC 50 value are known to the person skilled in the art.
  • the determination of the EC 5 o value preferably takes place by fluorimetry, particularly preferably as described under "Pharmacological Experiments".
  • Another object of the invention are methods for preparing the substituted 2-mercaptoquinoline-3-carboxamides of the invention.
  • the protective group PG 2 of the protected ester SI or S-VI or S-VIII or SX which represents, for example, a tert-butyl or a benzyl group, can be determined by a person skilled in the art known methods of ester cleavage are optionally cleaved in the presence of an acid or a base and SI, S-Vl, S-VIII or SX are converted into the carboxylic acid S-II or S-VII or S-IX or S-Xl.
  • the carboxylic acid S-II or S-VII or S-IX can be converted to the corresponding amide S-III or S-IV or SV by methods familiar to the person skilled in the art.
  • S-II or S-VII or S-IX for example, first with a suitable chlorinating agent such as thionyl chloride for
  • Acid chloride are reacted which is converted to amide 6 -NH 2 S-III or S-IV or SV following, optionally in the presence of a base with the primary amine R.
  • S-II or S-VII or S-IX can be reacted with the primary amine R 6 -NH 2 in the presence of a suitable coupling reagent, such as HATU or CDI, if appropriate with addition of a base.
  • steps ax3 and ax ⁇ protected by the protecting group PG 1 thiols S-IV and S-Vl can be formed starting from the 2-chloro-quinolines S-III and SI by methods known to those skilled, for example by each by alkylation with the corresponding thiol PG 1 -SH in a / pso substitution to the thioether S-IV and S-VI, if appropriate in the presence of a base.
  • the thioether-protected thiol S-IV or S-Vl or S-VII can be converted by cleavage of the protective group PG 1 into the thiol SV or S-VIII or S-IX be, optionally in the presence of an acid or a base.
  • the thiol S-IX in S-VII which is a protected by the protecting group PG 1 thiol function can be converted by the skilled person methods.
  • the thiol S-IX can, for example, be alkylated by use of an alkyl halide PG 1 -Hal, if appropriate in the presence of a base.
  • the thiol S-VIII can be converted into the corresponding thioether SX by methods familiar to the person skilled in the art.
  • the thiols S-VIII can, for example, be alkylated by using the alkyl halide R 7 -Hal, if appropriate in the presence of a base.
  • the 2-chloro-quinoline SI can be prepared by methods known to the person skilled in the art, for example by substitution with a thiol, for example Mercaptopropanklathylester, first converted into the corresponding thioether, which can be cleaved subsequent to the thiol S-VIII, optionally in the presence of an acid or a base.
  • a thiol for example Mercaptopropanklathylester
  • the thioether SX can be formed starting from the 2-chloro-quinoline SI by methods known to those skilled in the art, for example by alkylation with the corresponding thiol R 7 -SH in a / pso substitution, if appropriate in the presence of a base ,
  • the thiol SV can be converted into the corresponding thioether S-XII by methods known to those skilled in the art.
  • the thioe SV can be alkylated, for example, by use of the alkyl halide R 7 -Hal, if appropriate in the presence of a base.
  • step bl_1 the carboxylic acid S-XI can be converted to the corresponding amide S-XII by methods familiar to the person skilled in the art.
  • S-X1 can first be reacted with a suitable chlorinating agent such as thionyl chloride to give the acid chloride, which is subsequently reacted, if appropriate in the presence of a base, with the primary amine R 6 -NH 2 to give amide S-XII.
  • S-XI can be prepared in the presence of a suitable coupling reagent such as HATU or CDI, if appropriate with the addition of a base, are reacted with the primary amine R 6 -NH 2 .
  • the thioether S-XII can be formed from 2-chloro-quinolines S-III by methods known to those skilled in the art, for example by alkylation with the corresponding thiol R 7 -SH in a / pso substitution, optionally in Presence of a base.
  • the aqueous phase was adjusted to pH 2 with 1 M hydrochloric acid and then extracted with EA.
  • the organic phase was washed with brine, dried over Na 2 SO 4 , filtered and concentrated in vacuo.
  • the residue obtained was 420 mg (1.38 mmol, 27%) of 7-tert-butyl-2-ethylsulfanyl-4-methyl-quinoline-3-carboxylic acid, which were reacted further without additional purification.
  • Human CHO-K1 cells expressing KCNQ2 / 3 channels are incubated in cell culture flasks (eg 80 cm 2 TC flasks, Nunc) with DMEM-high glucose (Sigma Aldrich, D7777) including 10% FCS (PAN Biotech, eg 3302-P270521). or alternatively MEM Alpha Medium (1x, liquid, Invitrogen, # 22571), 10% Fetal CaIf Serum (FCS) (Invitrogen, # 10270-106, heat-inactivated) and the necessary selection antibiotics cultured at 37 ° C, 5% CO 2 and 95% humidity ,
  • FCS Fetal CaIf Serum
  • the cells are washed with a 1 ⁇ DPBS buffer without Ca 2 VMg 2+ (eg Invitrogen, # 14190-094) and detached from the bottom of the culture vessel by means of Accutase (PAA Laboratories, # L11-007) (incubation with Accutase for 15 min at 37 0 C).
  • the number of cells then present is determined using a CASY TM cell counter (model TCC, Shurfe System) and then, depending on the density optimization for the individual cell line, 20,000-30,000 cells / well / 100 ⁇ l of the described nutrient medium on the 96 wells.
  • Corning TM CellBIND TM (Fiat Clear Bottom Black Polystyrene Microplates, # 3340) Disks. This is followed by a one-hour incubation at room temperature without fumigation or humidity control, followed by a 24 hour incubation at 37 ° C, 5% CO 2 and 95% humidity.
  • the voltage-sensitive fluorescent dye from the Membrane Potential Assay Kit (Red TM BuIk format part R8123 for FLIPR, MDS Analytical Technologies TM) is prepared by diluting the contents of a jar Membrane Potential Assay Kit Red ComponentA into 200 ml Extracellular Buffer (ES buffer, 120 mM NaCl, 1mM KCl, 10mM HEPES, 2mM CaCl 2 , 2mM MgCl 2 , 10mM glucose, pH 7.4). After removal of the nutrient medium, the cells are washed with 200 ⁇ l of ES buffer, then overlaid with 100 ⁇ l of the above-prepared dye solution and incubated for 45 min at room temperature under light.
  • ES buffer 120 mM NaCl, 1mM KCl, 10mM HEPES, 2mM CaCl 2 , 2mM MgCl 2 , 10mM glucose, pH 7.4
  • Fluorescence measurements are performed with a BMG Labtech FLUOstar TM, BMG Labtech NOVOstar TM or BMG Labtech POLARstar TM instrument (525 nm Exation, 560 nm emission, bottom read mode). After the dye incubation, 50 .mu.l of the substances to be tested in the desired concentrations or 50 .mu.l of ES buffer are added to separate wells of the measuring plate for control and incubated for 30 min at room temperature with the shielding of light. The fluorescence intensity of the dye is then measured for 5 minutes and the fluorescence value F 1 of each well is determined at a fixed and constant point in time.
  • the fluorescence intensity F 2 is compared with the fluorescence intensity F 1 and the agonistic activity of the target compound on the potassium channel is determined therefrom.
  • F 2 and Fi are charged as follows:
  • F with - are compared by control cells. - is determined by
  • a substance has an agonistic activity on the potassium channel if - greater than - is:
  • the antinociceptive activity of the test substance against an acute, noxious thermal stimulus was measured in the rat tail-tail test by the method of D'Amour and Smith (J. Pharm. Exp. Ther. 72, 74, 79 (1941)). examined.
  • male Sprague-Dawley rats (breeder: Janvier, Le Genest St. Isle, France) weighing between 200 - 250 g were used.
  • the animals were individually placed in special test compartments and the tail base exposed to a focused beam of an analgesic meter (Model 2011, Rhema Labortechnik, Hofheim, Germany). 10 animals per group were used.
  • the escape latency time from switching on the combustion jet to the sudden withdrawal of the tail
  • the focal jet intensity was chosen so that the control latency was 7 - 9 seconds.
  • the measurement of the withdrawal latency was then repeated 10, 20, 30 and 60 minutes after peroral administration of the substance.
  • the antinociceptive effect of the test substance was determined as an increase in the withdrawal latency according to the following formula:
  • T 0 control latency before substance application
  • Ti latency after substance application
  • T 2 maximum exposure time of the firing beam (30 seconds)
  • MPE maximum possible effect (maximum possible effect).
  • Table 3 summarizes the results from the previously described pharmacological models.
  • R 5 excludes a 4-hydroxy function.

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US20100234372A1 (en) 2010-09-16
ECSP11011348A (es) 2011-10-31
CL2011002209A1 (es) 2012-02-10
AU2010223513B2 (en) 2014-12-04
JP2012520249A (ja) 2012-09-06
AU2010223513A1 (en) 2011-11-03
IL214945A0 (en) 2011-11-30
KR20110132590A (ko) 2011-12-08
US8399673B2 (en) 2013-03-19
CA2755004A1 (en) 2010-09-16
TWI461197B (zh) 2014-11-21
US20120252841A1 (en) 2012-10-04
PE20120790A1 (es) 2012-07-08
AR075824A1 (es) 2011-04-27
BRPI1008939A2 (pt) 2016-03-15
NZ595625A (en) 2012-10-26
CN102348692A (zh) 2012-02-08
WO2010102811A1 (de) 2010-09-16
ZA201107444B (en) 2012-06-27
TW201034670A (en) 2010-10-01
JP5727946B2 (ja) 2015-06-03

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