WO2001030772A1 - Compounds and their use as cysteine protease inhibitors - Google Patents
Compounds and their use as cysteine protease inhibitors Download PDFInfo
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- WO2001030772A1 WO2001030772A1 PCT/GB2000/004086 GB0004086W WO0130772A1 WO 2001030772 A1 WO2001030772 A1 WO 2001030772A1 GB 0004086 W GB0004086 W GB 0004086W WO 0130772 A1 WO0130772 A1 WO 0130772A1
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Definitions
- the present invention relates to compounds that are cysteine protease inhibitors and in particular compounds that are Cathepsin L inhibitors and or Cathepsin S inhibitors especially Cathepsin S inhibitors.
- the invention further relates to processes for their preparation, to intermediates useful in their preparation, to their use as therapeutic agents, to pharmaceutical compositions containing them and to a method of treating a Cathepsin L or Cathepsin S mediated disease state.
- Cysteine proteases are enzymes important in normal cell physiology, but they are also associated with several disease states including autoimmunity, inflammation, metastasis, tissue damage following myocardial infarction, bone resorption and muscle wasting in dystrophic diseases.
- Cathepsins B, H, K, L, N, P, W and S are cysteinyl proteases involved in normal protein degradation and are normally located in the lysosomes of cells. However, when these enzymes are found outside the lysosomes they have been implicated as playing a causative role in a number of disease states including bone resorption disease such as osteoporosis.
- Living bone is continuously being remodelled and replenished by the process of resorption and deposition of the protein matrix and calcium minerals. These events are facilitated by the osteoclast, which has the ability to degrade and demineralise the bone, and the osteoblast which is responsible for new bone generation. In normal situations these processes are intimately linked resulting in little alteration of bone mass.
- pathological conditions exist in which there is an imbalance between their activities resulting in increased degradation and demineralisation (resorption) of bone and the development of fragile and/or brittle bone structure, as seen during osteoporosis.
- Cathepsins B, H, K, L, N, P, W and S have been further implicated as playing a causative role in other diseases such as rheumatoid arthritis, osteoarthritis, tumour metastasis, pneumocystitis, Crithidia fusiculata, malaria, trypanosoma brucei brucei, schistosomiasis, periodontal disease, metachromatic leukodystrophy and muscular dystrophy.
- Cathepsins B, H, K, L, N, P, W and S either alone or together, have also been implicated as playing a causative role in chronic obstructive pulmonary disease (COPD).
- COPD chronic obstructive pulmonary disease
- Rheumatoid arthritis is one of the commonest of these affecting about 0.5 % of the world's population causing significant morbidity and mortality. Within 5 years of diagnosis 60-70% of patients will experience difficulty with mobility. Rheumatoid arthritis patients die earlier than age and gender matched individuals in the general population.
- the present invention discloses compounds with inhibitory activity of cysteine proteases and in particular of Cathepsin L and or Cathepsin S.
- the compounds of the invention are also useful in the treatment of chronic obstructive pulmonary disease (COPD).
- COPD chronic obstructive pulmonary disease
- R 1 and R 2 are independently selected from hydrogen, phenyl, naphthyl, heteroaryl, heterocycle, C 3 . 12 cycloalkyl or C 1-6 alkyl (wherein said C ⁇ -6 alkyl is optionally substituted with one or more phenyl, naphthyl, C 3-12 cycloalkyl, heterocycle or heteroaryl) or R 1 and R 2 together with the nitrogen to which they are attached form Het; and wherein any phenyl, naphthyl, heteroaryl, heterocycle, C 3 _ ⁇ 2 cycloalkyl or Het is optionally substituted with one or more R ;
- R 3 is hydrogen, C 1-6 alkyl (wherein said Cj- ⁇ alkyl is optionally substituted with one or more phenyl, naphthyl, heteroaryl, heterocycle, C 3-12 cycloalkyl, -NHR 8 , -SR 8 or -OR 8 ), hydroxy, -OR 8 , -NHCOR 9 , -NHSO 2 R 9 , phenyl, naphthyl, C 3- ⁇ 2 cycloalkyl, heterocycle or heteroaryl; and wherein any phenyl, naphthyl, heterocycle, heteroaryl or C 3 _ J2 cycloalkyl is optionally substituted with one or more R 7 ;
- R 4 is hydrogen or a group of formula (la):
- X is C]. 6 alkyl, phenyl, naphthyl, heteroaryl, C 3 _ ]2 cycloalkyl or heterocycle wherein said C ⁇ -6 alkyl, phenyl, naphthyl, heteroaryl, C 3- ⁇ 2 cycloalkyl or heterocycle are optionally substituted with one or more R ;
- M is -O-, -S-, -SO-, -SO 2 -, -NH-, -N(C 1-4 alkyl)- or M is a direct bond; n is 0-3; m is 0-3;
- R 5 is hydrogen, C ⁇ - 6 alkyl, C ⁇ -6 alkylsulphanyl, C ⁇ . 6 alkoxy, phenyl or heteroaryl wherein said C ⁇ _ alkyl, Ci_ 6 alkylsulphanyl, C ⁇ _ 6 alkoxy, phenyl or heteroaryl are optionally substituted with one or more R 1 ' ;
- R 6 is hydrogen or C ⁇ _ 6 alkyl
- R is hydrogen, C ⁇ - alkyl (wherein said C 1-6 alkyl is optionally substituted with one or more phenyl, naphthyl, C 3 _ ⁇ 2 cycloalkyl, heterocycle or heteroaryl), phenyl, naphthyl, C 3 . ⁇ 2 cycloalkyl, heterocycle or heteroaryl; and wherein any phenyl, naphthyl, heteroaryl, heterocycle or C 3- ⁇ 2 cycloalkyl is optionally substituted with one or more R ;
- R 9 is C ⁇ _ 6 alkyl (wherein said C ⁇ _ 6 alkyl is optionally substituted with one or more phenyl, naphthyl, C 3- ⁇ 2 cycloalkyl, heterocycle or heteroaryl), phenyl, naphthyl, C 3 _ ⁇ 2 cycloalkyl, heterocycle or heteroaryl; and wherein any phenyl, naphthyl, heterocycle, heteroaryl or C 3-12 cycloalkyl is optionally substituted with one or more R 13 ;
- R 7 , R 10 , R ⁇ , R 12 and R 13 are, independently, C ⁇ _ 6 alkyl, C 2 . 6 alkenyl, C 2-6 alkynyl, halo, trifluoromethyl, hydroxy, trifluoromethoxy, cyano, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, amino, . ⁇ alkylamino, N,N-(C ⁇ . 6 alkyl) 2 amino, C ⁇ _ 6 alkanoylamino, nitro, carboxy, carbamoyl, N-(C ⁇ -6 alkyl)carbamoyl, N,N-(C ⁇ _ 6 alkyl) 2 carbamoyl, C ⁇ .
- the present invention provides a compound of formula (I), wherein:
- R 1 and R 2 are independently selected from hydrogen, phenyl, naphthyl, heteroaryl, heterocycle, C 3 . 12 cycloalkyl or C]. alkyl (wherein said C ⁇ _ 6 alkyl is optionally substituted with one or more phenyl, naphthyl, C 3 . ⁇ 2 cycloalkyl, heterocycle or heteroaryl) or R 1 and R 2 together with the nitrogen to which they are attached form Het; and wherein any phenyl, naphthyl, heteroaryl, heterocycle, C _ ⁇ 2 cycloalkyl or Het is optionally substituted with one or more R 7 ;
- R is hydrogen, C ⁇ _ 6 alkyl (wherein said is optionally substituted with one or more phenyl, naphthyl, heteroaryl, heterocycle, C 3 _i 2 cycloalkyl, - ⁇ HR 8 , -SR 8 or -OR 8 ), hydroxy, -OR 8 , - ⁇ HCOR 9 , - ⁇ HSO 2 R 9 , phenyl, naphthyl, C 3- ⁇ 2 cycloalkyl, heterocycle or heteroaryl; and wherein any phenyl, naphthyl, heterocycle, heteroaryl or C 3 _ ⁇ cycloalkyl is optionally substituted with one or more R 7 ;
- R is hydrogen or a group of formula (la):
- X is C ⁇ _ 6 alkyl, phenyl, naphthyl, heteroaryl, C 3 _ ⁇ 2 cycloalkyl or heterocycle wherein said C ⁇ _ alkyl, phenyl, naphthyl, heteroaryl, C 3 . 12 cycloalkyl or heterocycle are optionally substituted with one or more R 10 ;
- M is -O-, -S-, -SO-, -SO 2 -, -NH-, -N(C ⁇ -4 alkyl)- or M is a direct bond; n is 0-3; m is 0-3;
- R 5 is hydrogen, C ⁇ -6 alkyl, C]_ 6 alkylsulphanyl, C]. 6 alkoxy, phenyl or heteroaryl wherein said C 1- alkyl, C ⁇ - 6 alkylsulphanyl, phenyl or heteroaryl are optionally substituted with one or more R 11 ;
- R 6 is hydrogen or C ⁇ _ 6 alkyl
- R 7 is C ⁇ _ 6 alkyl, C 2-6 alkenyl, C 2 . 6 alkynyl, halo, trifluoromethyl, hydroxy, trifluoromethoxy, cyano, C ⁇ . 6 alkoxy, C ⁇ _ 6 alkanoyl, C ⁇ - alkanoyloxy, amino, C ⁇ - 6 alkylamino, NN-(C ⁇ - alkyl) 2 amino, C ⁇ _ 6 alkanoylamino, nitro, carboxy, carbamoyl, N-(C ⁇ - 6 alkyl)carbamoyl, NN-(C ⁇ .
- R 8 is hydrogen, C ⁇ -6 alkyl (wherein said C ⁇ -6 alkyl is optionally substituted with one or more phenyl, naphthyl, C 3 _ ⁇ 2 cycloalkyl, heterocycle or heteroaryl), phenyl, naphthyl, C 3 _ ⁇ 2 cycloalkyl, heterocycle or heteroaryl; and wherein any phenyl, naphthyl, heteroaryl, heterocycle or C - ⁇ 2 cycloalkyl is optionally substituted with one or more R 12 ;
- R 9 is C ⁇ _ 6 alkyl (wherein said C ⁇ -6 alkyl is optionally substituted with one or more phenyl, naphthyl, C 3 . 12 cycloalkyl, heterocycle or heteroaryl), phenyl, naphthyl, C 3 _ 12 cycloalkyl, heterocycle or heteroaryl; and wherein any phenyl, naphthyl, heterocycle, heteroaryl or C _ ⁇ 2 cycloalkyl is optionally substituted with one or more R 1 ⁇ ;
- R 10 is C ⁇ - 6 alkyl, C 2 _ alkenyl, C 2 . 6 alkynyl, halo, trifluoromethyl, hydroxy, trifluoromethoxy, cyano, C ]-6 alkoxy, C]. 6 alkanoyl, Cj- ⁇ alkanoyloxy, amino, C ⁇ .
- R 12 is C ⁇ . 6 alkyl, C 2 . 6 alkenyl, C 2 . 6 alkynyl, halo, trifluoromethyl, hydroxy, trifluoromethoxy, cyano, C 1-6 alkoxy, C ⁇ -6 alkanoyl, C ⁇ . 6 alkanoyloxy, amino, C ⁇ _ 6 alkylamino, N,N-(C 1-6 alkyl) 2 amino, C ⁇ _ 6 alkanoylamino, nitro, carboxy, carbamoyl, A/-(C 1-6 alkyl)carbamoyl, N,N-(C].
- alkyl 2 carbamoyl, C ⁇ _ 6 alkoxycarbonyl, mercapto, C ⁇ _ 6 alkylsulphanyl, C ⁇ . 6 alkylsulphinyl, Ci- ⁇ alkylsulphonyl, sulphamoyl, N-(C ⁇ -6 alkyl)sulphamoyl or N,N-(C ⁇ . 6 alkyl) sulphamoyl;
- R 13 is C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, halo, trifluoromethyl, hydroxy, trifluoromethoxy, cyano, C ⁇ _ 6 alkoxy, C ⁇ -6 alkanoyl, C ⁇ -6 alkanoyloxy, amino, C ⁇ .
- 'alkyl' includes straight chained and branched structures.
- C ⁇ . 6 alkyl includes propyl, isopropyl and t- butyl.
- references to individual alkyl groups such as 'propyl' are specific for the straight chained version only and references to individual branched chain alkyl groups such as 'isopropyl' are specific for the branched chain version only.
- hydroxyC ⁇ . 6 alkyl includes 1 -hydroxyethyl and 2-hydroxyethyl.
- halo refers to fluoro, chloro, bromo and iodo.
- Het is a saturated, partially saturated or fully unsaturated, mono or bicyclic ring that contains 4-12 atoms, one atom of which is the nitrogen atom to which R 1 and R 2 are attached to, and the other atoms are either all carbon atoms or they are carbon atoms and 1 -3 heteroatoms chosen from nitrogen, sulphur or oxygen, wherein a -CH 2 - group can optionally be replaced by a -C(O)-, and a ring sulphur atom may be optionally oxidised to form S-oxide(s). It will be appreciated that where R 1 and R together with the nitrogen atom to which they are attached form a group Het this nitrogen atom is not quatemised, i.e.
- Het a neutral compound is formed.
- Suitable values for "Het” include mo ⁇ holino, piperidyl, piperazinyl, pyrrolidinyl, thiomo ⁇ holino, pyrrolinyl, homopiperazinyl, pyrrolyl, pyrazolyl, pyrazolinyl, imidazolyl, imidazolinyl, imidazolidinyl, pyrazolidinyl and triazolyl.
- Het is mo ⁇ holino, piperidyl, piperazinyl, pyrrolidinyl, thiomo ⁇ holino, pyrrolinyl or homopiperazinyl.
- Heterocycle is a fully saturated, mono or bicyclic ring that contains 4-12 atoms, at least one of which is selected from nitrogen, sulphur or oxygen, wherein a -CH 2 - group can optionally be replaced by a -C(O)-, and a ring sulphur atom may be optionally oxidised to form S-oxide(s).
- Suitable values for "heteroaryl” include mo ⁇ holino, piperidyl, piperazinyl, pyrrolidinyl, thiomo ⁇ holino, homopiperazinyl, imidazolyl, imidazolidinyl, pyrazolidinyl, dioxanyl and dioxolanyl.
- heterocycle is mo ⁇ holino, piperidyl, piperazinyl, pyrrolidinyl, thiomo ⁇ holino or homopiperazinyl.
- Heteroaryl is a partially unsaturated or fully unsaturated, mono or bicyclic ring that contains 4-12 atoms, at least one of which is selected from nitrogen, sulphur or oxygen, wherein a -CH 2 - group can optionally be replaced by a -C(O)-, and a ring sulphur and/or nitrogen atom may be optionally oxidised to form S-oxide(s) and/or an N-oxide.
- heteroaryl examples include thienyl, furyl, imidazolyl, thiazolyl, thiadiazolyl, pyrimidinyl, pyridinyl, pyrazinyl, pyridazinyl, triazinyl, pyrrolyl and pyrazolyl.
- heteroaryl is thienyl, furyl, imidazolyl, thiazolyl, pyrimidinyl, pyridinyl, pyrrolyl and pyrazolyl.
- Examples of “C ⁇ _ 6 alkanoyloxy” are acetoxy and propionyloxy.
- Examples of “C ⁇ -6 alkoxycarbonyl” include methoxycarbonyl, ethoxycarbonyl, n- and t-butoxycarbonyl.
- Examples of “C]. alkoxy” include methoxy, ethoxy and propoxy.
- Examples of “C 1-6 alkanoylamino” include formamido, acetamido and propionylamino. Examples of include methylsulphinyl and ethylsulphinyl.
- Examples of “C]. 6 alkylsulphonyl include mesyl and ethylsulphonyl.
- Examples of “C ⁇ _ 6 alkanoyl” include acetyl and propionyl.
- Examples of “C] -6 alkylamino” include methylamino and ethylamino.
- Examples of “ ⁇ /,N-(C ⁇ _ 6 alkyl) 2 amino” include N,N-dimefhylamino, ⁇ /N-diethylamino and A/-ethyl-A/-methylamino.
- Examples of “C 2 . 6 alkenyl” are vinyl, allyl and 1-propenyl.
- Examples of “C 2 - 6 alkynyl” are ethynyl, 1-propynyl and 2-propynyl.
- Examples of " ⁇ /-(C ⁇ _ 6 alkyl)carbamoyl” are ⁇ /-methylaminocarbonyl and /V-ethylaminocarbonyl.
- Examples of "N ⁇ /-(C ⁇ . 6 alkyl) 2 carbamoyl” are N,N-dimethylaminocarbonyl and N-methyl-N- ethylaminocarbonyl.
- Examples of "N-(C]_ 6 alkyl)sulphamoyl” are N-methylsulphamoyl and N-ethylsulphamoyl.
- N,N-(C 1- 6alkyl) 2 sulphamoyl are N, ⁇ /-dimethylsulphamoyl and N ⁇ /-diethylsulphamoyl.
- C 3 _ ⁇ 2 cycloalkyl are cyclopropyl, cyclopentyl and cyclohexyl.
- substituents are chosen from "one or more” groups it is to be understood that this definition includes all substituents being chosen from one of the specified groups or the substituents being chosen from two or more of the specified groups.
- substituents are chosen from one or more halo, C ⁇ _ 6 alkoxy and C ⁇ _ 6 alkyl
- examples of possible combinations of substituents include 1) a bromo group, 2) two chloro groups, 3) a methoxy, ethoxy and propoxy substituent, 4) a fluoro and a methoxy group, 5) a methoxy, a methyl and an ethyl group, and 6) a chloro, a methoxy and an ethyl group.
- R 1 , R 2 , R 3 and R 4 are as follows. Such values may be used where appropriate with any of the definitions, claims or embodiments defined hereinbefore or hereinafter.
- R 1 and R 2 together with the nitrogen to which they are attached form Het.
- R 1 and R 2 together with the nitrogen to which they are attached form mo ⁇ holino.
- R 3 is hydrogen
- R 4 is a group of formula (la) as depicted above wherein X is C ⁇ _ alkyl or phenyl, M is a direct bond, n is 0-3 and m is 0-3.
- R 4 is isobutyl, pentyl or 3-phenylpropyl.
- R 5 is hydrogen or heteroaryl.
- R is hydrogen
- R 5 is heteroaryl
- R is hydrogen
- R is hydrogen;
- R 4 is a group of formula (la) as depicted above wherein X is C ⁇ _ 6 alkyl or phenyl, M is a direct bond, n is 0-3 and m is 0-3;
- R 5 is hydrogen
- R is hydrogen; or a pharmaceutically acceptable salt thereof.
- R 3 is hydrogen
- R 4 is isobutyl, pentyl or 3-phenylpropyl
- R is hydrogen
- R 6 is hydrogen; or a pharmaceutically acceptable salt thereof.
- a preferred aspect of the invention relates to any one of the Examples or a pharmaceutically acceptable salt thereof.
- Suitable pharmaceutically acceptable salts include acid addition salts such as the methanesulphonate, fumarate, hydrochloride, hydrobromide, citrate and maleate salts and salts formed with phosphoric and sulphuric acid.
- suitable salts are base salts such as an alkali metal salt for example a sodium salt, an alkaline earth metal salt for example a calcium or a magnesium salt, an organic amine salt for example a salt with triethylamine, mo ⁇ holine, N-methylpiperidine, ⁇ /-ethylpiperidine, procaine, dibenzylamine, N,N-dibenzylethylamine or an amino acid for example a lysine salt.
- a preferred pharmaceutically acceptable salt is a sodium salt.
- Some compounds of formula (I) may possess chiral centres. It is to be understood that the invention encompasses all such optical isomers and diasteroisomers of compounds of formula (I) which possess cysteine protease inhibitory activity, and mixtures thereof in all proportions.
- the invention further relates to all tautomeric forms of the compounds of formula (I).
- Acids and amines may be coupled together in the presence of a suitable coupling reagent.
- Standard peptide coupling reagents known in the art can be employed as suitable coupling reagents, or for example carbonyldiimidazole and dicyclohexyl-carbodiimide, optionally in the presence of a catalyst such as dimethylaminopyridine or 4-pyrrolidinopyridine, optionally in the presence of a base for example triethylamine, pyridine, or 2,6-di- ⁇ /fcy/-pyridines such as 2,6-lutidine or 2,6-di-tert-butylpyridine.
- Suitable solvents include dimethylacetamide, dichloromethane, benzene, tetrahydrofuran and dimethylformamide.
- the coupling reaction may conveniently be performed at a temperature in the range of -40 to 40°C.
- Suitable activated acid derivatives include acid halides, for example acid chlorides, and active esters, for example pentafluorophenyl esters.
- the reaction of these types of compounds with amines is well known in the art, for example they may be reacted in the presence of a base, such as those described above, and in a suitable solvent, such as those described above.
- the reaction may conveniently be performed at a temperature in the range of -40 to 40°C.
- this process may be carried out with thionyl chloride in the presence of a base for example triethylamine, pyridine, or 2,6-di- ⁇ /&y/-pyridines such as 2,6-lutidine or 2,6-di-tert-butylpyridine or by treatment with oxalyl chloride and pyridine in DMF.
- a base for example triethylamine, pyridine, or 2,6-di- ⁇ /&y/-pyridines such as 2,6-lutidine or 2,6-di-tert-butylpyridine or by treatment with oxalyl chloride and pyridine in DMF.
- the reaction may conveniently be carried out at a temperature at or below room temperature.
- Amides of formula (VI) may be prepared according to the following scheme:
- the necessary starting materials for the procedures described above may be made by procedures which are selected from standard organic chemical techniques, techniques which are analogous to the synthesis of known, structurally similar compounds, by techniques which are analogous to the above described procedures or by techniques which are analogous to the procedures described in the examples.
- aromatic substitution reactions include the introduction of a nitro group using concentrated nitric acid, the introduction of an acyl group using, for example, an acyl halide and a Lewis acid (such as aluminium trichloride) under Friedel Crafts conditions; the introduction of an alkyl group using an alkyl halide and Lewis acid (such as aluminium trichloride) under Friedel Crafts conditions; and the introduction of a halogeno group.
- modifications include the reduction of a nitro group to an amino group by, for example, catalytic hydrogenation with a nickel catalyst or treatment with iron in the presence of hydrochloric acid with heating; oxidation of alkylthio to alkylsulphinyl or alkylsulphonyl.
- a suitable protecting group for an amino or alkylamino group is, for example, an acyl group, for example an alkanoyl group such as acetyl, an alkoxycarbonyl group, for example a methoxycarbonyl, ethoxycarbonyl or tert-butoxycarbonyl group, an arylmethoxycarbonyl group, for example benzyloxycarbonyl, or an aroyl group, for example benzoyl.
- the deprotection conditions for the above protecting groups necessarily vary with the choice of protecting group.
- an acyl group such as an alkanoyl or alkoxycarbonyl group or an aroyl group may be removed for example, by hydrolysis with a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
- a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
- an acyl group such as a tert-butoxycarbonyl group may be removed, for example, by treatment with a suitable acid as hydrochloric, sulphuric or phosphoric acid or trifluoroacetic acid and an arylmethoxycarbonyl group such as a benzyloxycarbonyl group may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon, or by treatment with a Lewis acid for example boron tris(trifluoroacetate).
- a suitable alternative protecting group for a primary amino group is, for example, a phthaloyl group which may be removed by treatment with an alkylamine, for example dimethylaminopropylamine, or with hydrazine.
- a suitable protecting group for a hydroxy group is, for example, an acyl group, for example an alkanoyl group such as acetyl, an aroyl group, for example benzoyl, or an arylmethyl group, for example benzyl.
- the deprotection conditions for the above protecting groups will necessarily vary with the choice of protecting group.
- an acyl group such as an alkanoyl or an aroyl group may be removed, for example, by hydrolysis with a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
- a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
- an arylmethyl group such as a benzyl group may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon.
- a suitable protecting group for a carboxy group is, for example, an esterifying group, for example a methyl or an ethyl group which may be removed, for example, by hydrolysis with a base such as sodium hydroxide, or for example a tert-butyl group which may be removed, for example, by treatment with an acid, for example an organic acid such as trifluoroacetic acid, or for example a benzyl group which may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon.
- a base such as sodium hydroxide
- a tert-butyl group which may be removed, for example, by treatment with an acid, for example an organic acid such as trifluoroacetic acid, or for example a benzyl group which may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon.
- the protecting groups may be removed at any convenient stage in the synthesis using conventional techniques well known in the chemical art.
- a compound of the formula (I), or a pharmaceutically acceptable salt thereof for use in a method of treatment of the human or animal body by therapy.
- a method for producing inhibition of a cysteine protease in a warm blooded animal, such as man, in need of such treatment which comprises administering to said animal an effective amount of a compound of the present invention, or a pharmaceutically acceptable salt thereof
- the invention also provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof, for use as a medicament; and the use of a compound of the formula (I) of the present invention, or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in the inhibition of a cysteine protease in a warm blooded animal, such as man.
- the invention provides the use of a compound of the formula (I) of the present invention, or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in the inhibition of Cathepsin S in a warm blooded animal, such as man.
- a compound of the formula (I) or a pharmaceutically acceptable salt thereof for the therapeutic treatment of mammals including humans, in particular in the inhibition of a cysteine protease, it is normally formulated in accordance with standard pharmaceutical practice as a pharmaceutical composition.
- the present invention provides a pharmaceutical composition which comprises a compound of the formula (I) or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable diluent or carrier.
- compositions of this invention may be administered in standard manner for the disease condition that it is desired to treat, for example by oral, rectal or parenteral administration.
- the compounds of this invention may be formulated by means known in the art into the form of, for example, tablets, capsules, aqueous or oily solutions or suspensions, (lipid) emulsions, dispersible powders, suppositories, ointments, creams, drops and sterile injectable aqueous or oily solutions or suspensions.
- a suitable pharmaceutical composition of this invention is one suitable for oral administration in unit dosage form, for example a tablet or capsule which contains between 100 mg and 1 g of the compound of this invention.
- composition of the invention is one suitable for intravenous, subcutaneous or intramuscular injection.
- Each patient may receive, for example, an intravenous, subcutaneous or intramuscular dose of 1 mgkg "1 to 100 mgkg "1 of the compound, preferably in the range of 5 mgkg "1 to 20 mgkg “1 of this invention, the composition being administered 1 to 4 times per day.
- the intravenous, subcutaneous and intramuscular dose may be given by means of a bolus injection.
- the intravenous dose may be given by continuous infusion over a period of time.
- each patient will receive a daily oral dose which is approximately equivalent to the daily parenteral dose, the composition being administered 1 to 4 times per day.
- Buffers such as polyethylene glycol, polypropylene glycol, glycerol or ethanol or complexing agents such as hydroxy-propyl ⁇ cyclodextrin may be used to aid formulation.
- the above formulations may be obtained by conventional procedures well known in the pharmaceutical art.
- the tablets (a)-(c) may be enteric coated by conventional means, for example to provide a coating of cellulose acetate phthalate.
- the pharmaceutically-acceptable compounds of the present invention are useful in the inhibition of Cathepsin S, having a good activity in vitro against human Cathepsin S.
- Recombinant human Cathepsin S was cloned and expressed in Baculovirus, by the following method.
- the cDNA sequence for human Cathepsin S is available in the EMBL database Accession Number M90696. This database sequence was used to prepare, by PCR on mRNA from human tissues, a recombinant plasmid carrying an insert with a DNA sequence identical to that of Cathepsin S in the EMBL database (Ace No M90696).
- the techniques for mRNA isolation, PCR and cloning are standard techniques known by those skilled in the art. Sequence determination of the recombinant insert was carried out using established DNA sequencing techniques.
- the PCR was done so as to introduce an EcoRI cloning site 5' of the 'ATG' of Cathepsin S and an Xbal cloning site 3' of the 'Stop' codon.
- the PCR product was cloned between the EcoRI and Xbal sites of the baculovirus transfer vector pFASTBAC-1 (Bac-to- Bac Expression System commercially available from Gibco BRL -Life Technologies ( cat no 10359-016)). This recombinant construct was used to generate, by standard techniques, a recombinant baculovirus capable of expressing preprocathepsin S.
- Cathepsin S was tested for the baculoviral constructs by infection of two insect cell lines : Sf9 cells (ATCC No CRL-171 1) and T.ni cells (Invitrogen, Cat No B855-02). Purification of Cathepsin S Method 1.
- Procathepsin S was found in the insect cell medium and acid activated.
- the medium was mixed with an equal volume of lOOmM Sodium Acetate buffer pH 4.5, 5mM dithiothreitol (DTT) and 5mM EDTA and incubated for one hour at 37°C method of Maubach et al (Eur. J. Biochem., 250, 745-750, 1997).
- Method 2
- the pH of insect cell medium (10ml) containing procathepsin S was adjusted to 4.5 with glacial acetic acid and DTT and EDTA added to 5mM. The sample was then incubated at 37°C for 150min to enable conversion to the active enzyme. Ammonium sulphate was then added to 80% saturation and a pellet obtained by centrifugation. This pellet was redissolved in 2ml buffer A (lOOmM Tris, 500mM NaCl, ImM EDTA, pH7.5) and mixed in a batchwise fashion with lOO ⁇ l thiopropyl-Sepharose for 15min at 4°C. The non bound fraction was removed by a brief centrifugation and the gel washed with 2x1 ml buffer A. Cathepsin S was then eluted by batch mixing with 0.4ml 20mM DTT in buffer A for 15min at 4°C. Measurement of Cathepsin S Activity.
- Cathepsin S activity was measured based on the method of Maubach et al (Eur. J. Biochem., 250, 745-750, 1997), using the fluorogenic substrate Z-Val-Val-Arg-NHMec. Inhibitors were identified by their ability to decrease the generation of the fluorescent leaving group (NHMec). Briefly the assay was as follows: rHuman Cathepsin S (1.5 nmoles) was pre-incubated with or without compounds in 50mM Potassium phosphate buffer pH 6.0-6.2, 20mM Na 2 EDTA, 0.1 % Brij at 25°C for 5 minutes in a solid black 96 well plate.
- Synthetic substrate 20 ⁇ M Z-Val-Val-Arg-NHMec
- the reaction was stopped by the addition of 0.1M sodium chloroacetate pH 4.3. Fluorescence was determined using a Fluoroskan II plate reader; excitation 355nm, emission 460nm. Compound potency was determined from the raw fluorescence data by calculating the IC 50 against Cathepsin S using a PC graph drawing software package. When tested in the above in-vitro tests the compounds of this invention give IC 50 S in the range 1-10,000 nM.
- temperatures are given in degrees Celsius (°C); operations were carried out at room or ambient temperature, that is, at a temperature in the range of 18-25°C;
- organic solutions were dried over anhydrous magnesium sulphate; evaporation of solvent was carried out using a rotary evaporator under reduced pressure (600-4000 Pascals; 4.5-30 mm Hg) with a bath temperature of up to 60°C;
- chromatography means flash chromatography on silica gel; thin layer chromatography (TLC) was carried out on silica gel plates, where a silica Mega Bond Elut column is referred to, this means a column containing lOg or 20g of silica of 40 micron particle size, the silica being contained in a 60ml disposable syringe and supported by a porous disc, obtained from Varian, Harbor City, California, USA under the name "Mega Bond Elut SI"; "Mega Bond Elut” is a trademark;
- NMR data is in the form of delta values for major diagnostic protons, given in parts per million (ppm) relative to tetramethylsilane (TMS) as an internal standard, determined at 250 MHz using perdeuterio dimethyl sulphoxide (DMSO- ⁇ 6 ) as the solvent unless otherwise stated;
- the reaction mixture was evaporated to dryness under high vac and the residue obtained was partitioned between water (30 ml) and ethyl acetate (30 ml). The aqueous layer was collected and extracted with ethyl acetate (3 x 30 ml). The combined ethyl acetate extracts were washed with brine and dried The residue obtained on removal of the solvent was triturated with diethyl ether to give the title compound.
- Methyl R-2-(mo ⁇ hohnocarbonylmethyl)heptanoate (Method 3) (0.37g) was dissolved in THF (10 ml) and 1 0M lithium hydroxide (6.8 ml) was added and the mixture was stirred for 20 hours.
- the residue obtained on removal of the solvent was diluted with water (20 ml) and washed with ethyl acetate (2 x 20 ml)
- the aqueous extract was acidified with 2M HC1 and extracted with ethyl acetate (3 x 20 ml)
- the combined ethyl acetate extracts were washed with brine and dried. Removal of the solvent gave the title compound as an oil, yield 0.35g, (M+H) 258.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00971559A EP1228054A1 (de) | 1999-10-26 | 2000-10-23 | Verbindungen und ihre verwendung als inhibitoren von cystein-proteasen |
AU10398/01A AU1039801A (en) | 1999-10-26 | 2000-10-23 | Compounds and their use as cysteine protease inhibitors |
JP2001533126A JP2003512463A (ja) | 1999-10-26 | 2000-10-23 | 化合物およびシステインプロテアーゼ阻害剤としてのそれらの使用 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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GB9925264.5 | 1999-10-26 | ||
GBGB9925264.5A GB9925264D0 (en) | 1999-10-26 | 1999-10-26 | Chemical compounds |
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WO2001030772A1 true WO2001030772A1 (en) | 2001-05-03 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/GB2000/004086 WO2001030772A1 (en) | 1999-10-26 | 2000-10-23 | Compounds and their use as cysteine protease inhibitors |
Country Status (5)
Country | Link |
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EP (1) | EP1228054A1 (de) |
JP (1) | JP2003512463A (de) |
AU (1) | AU1039801A (de) |
GB (1) | GB9925264D0 (de) |
WO (1) | WO2001030772A1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6455502B1 (en) | 1999-03-15 | 2002-09-24 | Axys Pharmaceuticals, Inc. | Compounds and compositions as protease inhibitors |
WO2004002491A1 (en) * | 2002-06-26 | 2004-01-08 | Aventis Pharmaceuticals Inc. | Morpholine and tetrahydropyran drivatives and their use as cathepsin inhibitors |
WO2004020470A1 (ja) * | 2002-08-28 | 2004-03-11 | Tissue Engineering Initiative Co., Ltd. | システインプロテアーゼ処理コラーゲンの製造方法およびシステインプロテアーゼ処理コラーゲン |
US6977256B2 (en) | 2001-11-14 | 2005-12-20 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin S inhibitors |
US7064123B1 (en) | 2000-12-22 | 2006-06-20 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin inhibitors |
US7196099B2 (en) | 2001-09-14 | 2007-03-27 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin inhibitors |
EP2719700A1 (de) | 2008-01-09 | 2014-04-16 | Amura Therapeutics Limited | Tetrahydrofuro(3,2-b)pyrrol-3-one derivate als cysteine proteinase inhibitoren |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1673336B1 (de) * | 2003-08-21 | 2014-06-04 | Merck Canada Inc. | Cathepsincysteinproteasehemmer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0498665A1 (de) * | 1991-02-07 | 1992-08-12 | British Biotech Pharmaceuticals Limited | Hydraxamsäurederivate, Verfahren zu ihrer Herstellung und ihre Verwendung |
WO1998019998A2 (en) * | 1996-11-07 | 1998-05-14 | Novartis Ag | N-substituted 2-cyanopyrrolidines |
WO1999024460A2 (en) * | 1997-11-05 | 1999-05-20 | Novartis Ag | Dipeptide nitriles |
-
1999
- 1999-10-26 GB GBGB9925264.5A patent/GB9925264D0/en not_active Ceased
-
2000
- 2000-10-23 AU AU10398/01A patent/AU1039801A/en not_active Abandoned
- 2000-10-23 EP EP00971559A patent/EP1228054A1/de not_active Withdrawn
- 2000-10-23 WO PCT/GB2000/004086 patent/WO2001030772A1/en not_active Application Discontinuation
- 2000-10-23 JP JP2001533126A patent/JP2003512463A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0498665A1 (de) * | 1991-02-07 | 1992-08-12 | British Biotech Pharmaceuticals Limited | Hydraxamsäurederivate, Verfahren zu ihrer Herstellung und ihre Verwendung |
WO1998019998A2 (en) * | 1996-11-07 | 1998-05-14 | Novartis Ag | N-substituted 2-cyanopyrrolidines |
WO1999024460A2 (en) * | 1997-11-05 | 1999-05-20 | Novartis Ag | Dipeptide nitriles |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6455502B1 (en) | 1999-03-15 | 2002-09-24 | Axys Pharmaceuticals, Inc. | Compounds and compositions as protease inhibitors |
US6476026B1 (en) | 1999-03-15 | 2002-11-05 | Axys Pharmaceuticals, Inc. | Compounds and compositions as protease inhibitors |
US6593327B2 (en) | 1999-03-15 | 2003-07-15 | Axys Pharmaceuticals, Inc. | Compounds and compositions as protease inhibitors |
US7030116B2 (en) | 2000-12-22 | 2006-04-18 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin inhibitors |
US7064123B1 (en) | 2000-12-22 | 2006-06-20 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin inhibitors |
US7196099B2 (en) | 2001-09-14 | 2007-03-27 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin inhibitors |
US6977256B2 (en) | 2001-11-14 | 2005-12-20 | Aventis Pharmaceuticals Inc. | Compounds and compositions as cathepsin S inhibitors |
WO2004002491A1 (en) * | 2002-06-26 | 2004-01-08 | Aventis Pharmaceuticals Inc. | Morpholine and tetrahydropyran drivatives and their use as cathepsin inhibitors |
WO2004020470A1 (ja) * | 2002-08-28 | 2004-03-11 | Tissue Engineering Initiative Co., Ltd. | システインプロテアーゼ処理コラーゲンの製造方法およびシステインプロテアーゼ処理コラーゲン |
EP2719700A1 (de) | 2008-01-09 | 2014-04-16 | Amura Therapeutics Limited | Tetrahydrofuro(3,2-b)pyrrol-3-one derivate als cysteine proteinase inhibitoren |
Also Published As
Publication number | Publication date |
---|---|
GB9925264D0 (en) | 1999-12-29 |
AU1039801A (en) | 2001-05-08 |
JP2003512463A (ja) | 2003-04-02 |
EP1228054A1 (de) | 2002-08-07 |
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