WO2006070208A1 - Pyridine, pyrimidine and pyrazine derivatives as gpcr agonists - Google Patents
Pyridine, pyrimidine and pyrazine derivatives as gpcr agonists Download PDFInfo
- Publication number
- WO2006070208A1 WO2006070208A1 PCT/GB2005/050266 GB2005050266W WO2006070208A1 WO 2006070208 A1 WO2006070208 A1 WO 2006070208A1 GB 2005050266 W GB2005050266 W GB 2005050266W WO 2006070208 A1 WO2006070208 A1 WO 2006070208A1
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- WO
- WIPO (PCT)
- Prior art keywords
- alkyl
- cycloalkyl
- pharmaceutically acceptable
- acceptable salt
- group
- Prior art date
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- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 title description 5
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 title description 3
- 229940125633 GPCR agonist Drugs 0.000 title description 2
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 title description 2
- 150000003216 pyrazines Chemical class 0.000 title 1
- 150000001875 compounds Chemical class 0.000 claims abstract description 189
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- 125000000217 alkyl group Chemical group 0.000 claims description 112
- 125000000623 heterocyclic group Chemical group 0.000 claims description 41
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- 125000005843 halogen group Chemical group 0.000 claims description 38
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 35
- 239000001257 hydrogen Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 32
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- 125000001424 substituent group Chemical group 0.000 claims description 25
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 22
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 21
- 125000001153 fluoro group Chemical group F* 0.000 claims description 16
- -1 C2^ Chemical group 0.000 claims description 15
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- JBXUWTJKJKKFAZ-UHFFFAOYSA-N 4-[3-(piperidin-4-ylmethyl)phenyl]pyridine Chemical compound C=1C=CC(C=2C=CN=CC=2)=CC=1CC1CCNCC1 JBXUWTJKJKKFAZ-UHFFFAOYSA-N 0.000 claims description 3
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- UDPYUAHSZFGRJO-UHFFFAOYSA-N tert-butyl 4-[(3-pyridin-4-ylphenyl)methyl]piperidine-1-carboxylate Chemical compound C1CN(C(=O)OC(C)(C)C)CCC1CC1=CC=CC(C=2C=CN=CC=2)=C1 UDPYUAHSZFGRJO-UHFFFAOYSA-N 0.000 claims description 2
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- 210000000813 small intestine Anatomy 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000012312 sodium hydride Substances 0.000 description 1
- 229910000104 sodium hydride Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229960001471 sodium selenite Drugs 0.000 description 1
- 239000011781 sodium selenite Substances 0.000 description 1
- 235000015921 sodium selenite Nutrition 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000013222 sprague-dawley male rat Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
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- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 230000006103 sulfonylation Effects 0.000 description 1
- 238000005694 sulfonylation reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical class ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- GIKUIMYPWBYCEM-UHFFFAOYSA-N tert-butyl 4-[[methyl-(2-pyridin-4-ylpyrimidin-4-yl)amino]methyl]piperidine-1-carboxylate Chemical compound C=1C=NC(C=2C=CN=CC=2)=NC=1N(C)CC1CCN(C(=O)OC(C)(C)C)CC1 GIKUIMYPWBYCEM-UHFFFAOYSA-N 0.000 description 1
- WXLUPONGOHXFEL-UHFFFAOYSA-N tert-butyl 4-[[methyl-[(2-pyridin-4-ylpyrimidin-4-yl)methyl]amino]methyl]piperidine-1-carboxylate Chemical compound C=1C=NC(C=2C=CN=CC=2)=NC=1CN(C)CC1CCN(C(=O)OC(C)(C)C)CC1 WXLUPONGOHXFEL-UHFFFAOYSA-N 0.000 description 1
- JYUQEWCJWDGCRX-UHFFFAOYSA-N tert-butyl 4-formylpiperidine-1-carboxylate Chemical compound CC(C)(C)OC(=O)N1CCC(C=O)CC1 JYUQEWCJWDGCRX-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- RAOIDOHSFRTOEL-UHFFFAOYSA-N tetrahydrothiophene Chemical compound C1CCSC1 RAOIDOHSFRTOEL-UHFFFAOYSA-N 0.000 description 1
- ISXOBTBCNRIIQO-UHFFFAOYSA-N tetrahydrothiophene 1-oxide Chemical compound O=S1CCCC1 ISXOBTBCNRIIQO-UHFFFAOYSA-N 0.000 description 1
- 125000003831 tetrazolyl group Chemical group 0.000 description 1
- 229960004559 theobromine Drugs 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- BUGOPWGPQGYYGR-UHFFFAOYSA-N thiane 1,1-dioxide Chemical compound O=S1(=O)CCCCC1 BUGOPWGPQGYYGR-UHFFFAOYSA-N 0.000 description 1
- NNLBRYQGMOYARS-UHFFFAOYSA-N thiane 1-oxide Chemical compound O=S1CCCCC1 NNLBRYQGMOYARS-UHFFFAOYSA-N 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- JWCVYQRPINPYQJ-UHFFFAOYSA-N thiepane Chemical compound C1CCCSCC1 JWCVYQRPINPYQJ-UHFFFAOYSA-N 0.000 description 1
- XSROQCDVUIHRSI-UHFFFAOYSA-N thietane Chemical compound C1CSC1 XSROQCDVUIHRSI-UHFFFAOYSA-N 0.000 description 1
- AMIGYDGSJCJWSD-UHFFFAOYSA-N thiocane Chemical compound C1CCCSCCC1 AMIGYDGSJCJWSD-UHFFFAOYSA-N 0.000 description 1
- 230000000929 thyromimetic effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000001425 triazolyl group Chemical group 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 229960000281 trometamol Drugs 0.000 description 1
- 239000012137 tryptone Substances 0.000 description 1
- 238000000825 ultraviolet detection Methods 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
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- A—HUMAN NECESSITIES
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- A61P13/12—Drugs for disorders of the urinary system of the kidneys
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- A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A61P27/02—Ophthalmic agents
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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Definitions
- the present invention is directed to G-protein coupled receptor (GPCR) agonists.
- GPCR G-protein coupled receptor
- the present invention is directed to agonists of GPRl 16 that are useful for the treatment of obesity, e.g. as regulators of satiety, and for the treatment of diabetes.
- Obesity is characterized by an excessive adipose tissue mass relative to body size.
- body fat mass is estimated by the body mass index (BMI; weight(kg)/height(m) 2 ), or waist circumference.
- BMI body mass index
- Individuals are considered obese when the BMI is greater than 30 and there are established medical consequences of being overweight. It has been an accepted medical view for some time that an increased body weight, especially as a result of abdominal body fat, is associated with an increased risk for diabetes, hypertension, heart disease, and numerous other health complications, such as arthritis, stroke, gallbladder disease, muscular and respiratory problems, back pain and even certain cancers.
- Pharmacological approaches to the treatment of obesity have been mainly concerned with reducing fat mass by altering the balance between energy intake and expenditure.
- Drugs aimed at the pathophysiology associated with insulin dependent Type I diabetes and non-insulin dependent Type II diabetes have many potential side effects and do not adequately address the dyslipidaemia and hyperglycaemia in a high proportion of patients. Treatment is often focused at individual patient needs using diet, exercise, hypoglycaemic agents and insulin, but there is a continuing need for novel antidiabetic agents, particularly ones that may be better tolerated with fewer adverse effects.
- metabolic syndrome which is characterized by hypertension and its associated pathologies including atherosclerosis, lipidemia, hyperlipidemia and hypercholesterolemia have been associated with decreased insulin sensitivity which can lead to abnormal blood sugar levels when challenged.
- Myocardial ischemia and microvascular disease is an established morbidity associated with untreated or poorly controlled metabolic syndrome.
- novel antiobesity and antidiabetic agents particularly ones that are well tolerated with few adverse effects.
- GPRl 16 is a GPCR identified as SNORF25 in WO00/50562 which discloses both the human and rat receptors, US 6,468,756 also discloses the mouse receptor (accession numbers: AAN95194 (human), AAN95195 (rat) and ANN95196 (mouse)). In humans, GPRl 16 is expressed in the pancreas, small intestine, colon and adipose tissue. The expression profile of the human GPRl 16 receptor indicates its potential utility as a target for the treatment of obesity and diabetes.
- GPRl 16 agonists of GPRl 16 and are useful for the prophylactic or therapeutic treatment of obesity, and for the treatment of diabetes.
- the present invention is directed to a compound of formula (I), or a pharmaceutically acceptable salt thereof: R'-A-V-B-R 2
- V is phenyl or a 6-membered heteroaryl ring containing up to three N atoms
- n is independently 0, 1, 2 or 3;
- m is independently 0, 1 or 2;
- R 1 is 3- or 4-pyridyl, 4- or 5-pyrimidinyl or 2-pyrazinyl, any of which may be optionally substituted by one or more substituents selected from halo, C1-4 alkyl, C ⁇ fiuoroalkyl, C 2 A alkenyl, C ⁇ alkynyl, C 3-7 cycloalkyl, aryl, OR 6 , CN, NO 2 , S(O) m R 6 , CON(R 6 );., N(R 6 ) 2 , NR 10 COR 6 , NR 10 SO 2 R 6 , SO 2 N(R 6 ) 2 , a 4- to 7-membered heterocyclyl group or a 5- or 6- membered heteroaryl group;
- R 2 is 4- to 7-membered cycloalkyl substituted by R 3 , C(O)OR 3 , C(O)R 3 or S(O) 2 R 3 , or 4- to 7-membered heterocyclyl, containing one or two nitrogen atoms which is unsubstituted or substituted by C(O)OR 4 , C(O)R 3 , S(O) 2 R 3 , C(O)NHR 4 , P(O)(OR 1 % or a 5- or 6-membered nitrogen containing heteroaryl group;
- R 3 is C 3 - 8 alkyl, C 3 - 8 alkenyl or C 3 - 8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, d_ 4 alkylC 3 .
- R 4 is C 2 - 8 alkyl, C 2-8 alkenyl or C 2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, C ⁇ 4 alkylC 3-7 cycloalkyl, C ⁇ alkylaryl, C ⁇ alkylheterocyclyl or C1-4 alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, Ci -4 alkyl, Ci -4 fiuoroalkyl, OR 6 , CN, CO 2 Ci_ 4 alkyl, N(R 6 ) 2 and NO 2 ;
- R 4 is C 2 - 8 alkyl, C 2-8 alkenyl or C 2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro
- R 5 is hydrogen, C(O)R 7 , S(O) 2 R 8 , C 3-7 cycloalkyl or Ci -4 alkyl optionally substituted by OR 6 , C 3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, Ci -2 alkyl, Ci -2 fluoroalkyl, OR 6 , CN, N(R 6 ) 2 and NO 2 ;
- R 6 are independently hydrogen, C ⁇ 4 alkyl, C 3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 9 , CN, SO 2 CH 3 , N(R 10 ) 2 and NO 2 ; or a group N(R 10 ) 2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR 10 ;
- R 7 is hydrogen, Ci -4 alkyl, OR 6 , N(R 6 ) 2 , aryl or heteroaryl;
- R 8 is Ci -4 alkyl, Ci -4 fluoroalkyl, aryl or heteroaryl;
- R 9 is hydrogen, Ci -2 alkyl or Ci -2 fluoroalkyl
- R 10 is hydrogen or Ci -4 alkyl
- R 11 is phenyl
- R 12 is hydrogen, Ci -4 alkyl or C 3-7 cycloalkyl; provided that the compound is not: a) tert-butyl 4-(3-pyridin-4-ylbenzyl)piperidine-l-carboxylate; or b) 4-(3-pyridin-4-ylbenzyl)piperidine.
- Examples of the group V include pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl and triazinyl.
- V may for example represent a 6-membered heteroaryl ring of the formula:
- n groups of A and B do not both represent 0.
- n is preferably 0, 1 or 2, more preferably 0.
- n is preferably 2 or 3, more preferably 2.
- n is preferably 2 or 3, more preferably 2.
- one of the CH 2 groups in B is replaced, it is preferably replaced by O, NR 5 , S(O) n , or C(O); more preferably it is replaced by O or NR 5 .
- R 1 is preferably 4-pyridyl optionally substituted by 1 or 2 halo, Ci -4 alkyl, Ci -4 fluoroalkyl, Q M alkenyl, C 2-4 alkynyl, C 3-7 cycloalkyl, aryl, OR 6 , CN, NO 2 , S(O) 1n R 6 , CON(R 6 ) 2 , N(R 6 ) 2 , NR 10 COR 6 , NR 10 SO 2 R 6 , SO 2 N(R 6 ), 4- to 7-membered heterocyclyl or 5- or 6-membered heteroaryl groups; more preferably 4-pyridyl optionally substituted by halo, Ci -4 alkyl, C M alkoxy or CN; even more preferably 4-pyridyl, optionally substituted by halo, Ci -4 alkyl or CN; and especially 4-pyridyl, optionally substituted by CN.
- R 2 is a 4- to 7-membered heterocycl
- R 2 is preferably a 4- to 7-membered cycloalkyl substituted by R 3 or C(O)OR 3 , especially R 3 , or a 4- to 7-membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR 4 or a 6-membered nitrogen containing heteroaryl group, more preferably a 4- to 7- membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR 4 .
- R 2 is more preferably a 4- to 7-membered cycloalkyl substituted by R 3 , or a 4- to 7- membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR 4 .
- R 2 group is piperidinyl, especially 4-piperidinyl, which is substituted on the nitrogen atom by C(O)OR 4 .
- R 3 is preferably C 3-8 alkyl which may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, more preferably R 3 is C 3-8 alkyl.
- R 4 is preferably C 2-8 alkyl, C 2-8 alkenyl or C 2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl, 5- to 6-membered heteroaryl containing one or two nitrogen atoms, C ⁇ alkylC 3-7 cycloalkyl or C ⁇ alkylaryl, any of which may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 6 and C0 2 C ⁇ alkyl.
- R 4 is C 3-6 alkyl optionally substituted with up to 5 fluoro or chloro atoms, e.g. 3 fluoro or chloro atoms, and which may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl.
- R 5 is preferably hydrogen or C M alkyl, more preferably alkyl.
- R 6 is preferably hydrogen, C ⁇ alkyl or C 3-7 cycloalkyl, more preferably C ⁇ alkyl.
- R 7 is preferably hydrogen or C M alkyl.
- R 8 is preferably C ⁇ alkyl or C ⁇ fluoroalkyl.
- a specific group of compounds of the invention which may be mentioned are those of formula (Ia), or a pharmaceutically acceptable salt thereof:
- A is (CH 2 ) n ;
- B is (CH 2 ) n , where one of the CH 2 groups may be replaced by O, NR 6 , S(O) m or C(O); n is independently 0, 1, 2 or 3; m is 0, 1 or 2; R 1 is 3- or 4-pyridyl or 4-pyrimidinyl any of which may be optionally substituted by one or more substituents selected from halo, C ⁇ alkyl, C ⁇ fluoroalkyl, C 3-7 cycloalkyl, OR 5 , CN, NO 2 , N(R 6 ) 2 , CON(R 6 ) 2 or a 5- or 6-membered heteroaryl group;
- R 2 is 4- to 7-membered cycloalkyl substituted by R 3 , C(O)OR 3 , C(O)R 3 or S(O) 2 R 3 , or 4- to 7-membered heterocyclyl, containing one or two nitrogen atoms, which is unsubstituted or substituted by C(O)OR 4 , C(O)R 3 or S(O) 2 R 3 ;
- R 3 is C 3-7 alkyl, C 3-7 alkenyl or C 3-7 alkynyl any of which may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl or C ⁇ alkylaryl, wherein the aryl groups may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 5 , CN, N(R 6 ) 2 and NO 2 ;
- R 4 is C 2-7 alkyl, C 2-7 alkenyl or C 2-7 alkynyl any of which may contain a CH 2 group that may be replaced by O, or C 3 - 7 cycloalkyl, aryl or C1-4 alkylaryl, wherein the aryl groups may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 6 ,
- R 5 are independently hydrogen, C M alkyl or C M fluoroalkyl
- R 6 are independently hydrogen and C M alkyl.
- a preferred group of compounds of the invention are the compounds of formula (Ib), and pharmaceutically acceptable salts thereof:
- Z is C(O)OR 4 , C(O)R 3 , S(O) 2 R 3 , C(O)NHR 4 or a 5- or 6-membered nitrogen containing heteroaryl group;
- R 3 is C 3-8 alkyl, C 3-8 alkenyl or C 3-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, C M alkylC 3-7 cycloalkyl, C M alkylaryl, C M alkylheterocyclyl or C M alkylheteroaryl, any of which may be optionally substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 6 , CN, CO 2 C M alkyl, N(R 6 ) 2 and NO 2 ;
- R 4 is C 2-8 alkyl, C 2-8 alkenyl or C 2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, C M alkylC 3-7 cycloalkyl, C M alkylaryl, C M alkylheterocyclyl or C M alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 6 , CN, CO 2 C M alkyl, N(R 6 ) 2 and NO 2 ;
- R 6 are independently hydrogen, or C M alkyl, C 3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 9 , CN, SO 2 CH 3 , N(R 10 ) 2 and NO 2 ; or a group N(R 10 ) 2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR 10 ;
- R 9 is hydrogen, Ci -2 alkyl or Ci -2 fluoroalkyl
- R 10 is hydrogen or C1-4 alkyl.
- a further preferred group of compounds of the invention are the compounds of formula (Ic), and pharmaceutically acceptable salts thereof:
- a further preferred group of compounds of the invention are the compounds of formula (Id), and pharmaceutically acceptable salts thereof:
- R is hydrogen, halo, C M alkyl, C M fluoroalkyl, C 2-4 alkenyl, C 2-4 alkynyl, C 3-7 cycloalkyl, aryl, OR 6 , CN, NO 2 , S(O) 1n R 6 , CON(R 6 );., N(R 6 J 2 , NR 10 COR 6 , NR 10 SO 2 R 6 ,
- R 4 is C 2-8 alkyl, C 2-8 alkenyl or C 2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and contain a CH 2 group that may be replaced by O, or C 3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, Q -4 alkylC 3-7 cycloalkyl, C M alkylaryl, C M alkylheterocyclyl or Ci -4 alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 6 , CN, CO 2 C M alkyl, N(R ⁇ 2 and NO 2 ;
- R 5 is C M alkyl
- R 6 are independently hydrogen, or C M alkyl, C 3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, C M alkyl, C M fluoroalkyl, OR 9 , CN, SO 2 CH 3 , N(R 10 ) 2 and NO 2 ; or a group N(R 10 ) 2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR 10 ;
- R 9 is hydrogen, Ci -2 alkyl or Ci -2 fluoroalkyl
- R 10 is hydrogen or C M alkyl
- p is 0 or 1.
- R is preferably hydrogen, halo, C ⁇ alkyl, C ⁇ 4 alkoxy or CN.
- preferred compounds of this invention include those in which several or each variable in formula (I) is selected from the preferred, more preferred or particularly listed groups for each variable. Therefore, this invention is intended to include all combinations of preferred, more preferred and particularly listed groups. The preferences listed above also apply, where applicable, to the compounds of formula (Ia) to (Id).
- alkyl as well as other groups having the prefix “alk” such as, for example, alkenyl, alkynyl, and the like, means carbon chains which may be linear or branched or combinations thereof. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, sec- and tert-butyl, pentyl, hexyl, heptyl and the like. "Alkenyl”, “alkynyl” and other like terms include carbon chains having at least one unsaturated carbon- carbon bond.
- fluoroalkyl includes alkyl groups substituted by one or more fluorine atoms, e.g. CH 2 F, CHF 2 and CF 3 .
- cycloalkyl means carbocycles containing no heteroatoms, and includes monocyclic and bicyclic saturated and partially saturated carbocycles.
- examples of cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl.
- Examples of partially saturated cycloalkyl groups include cyclohexene and indane. Cycloalkyl groups will typically contain 3 to 10 ring carbon atoms in total (e.g. 3 to 6, or 8 to 10).
- halo includes fluorine, chlorine, bromine, and iodine atoms.
- aryl includes phenyl and naphthyl, in particular phenyl.
- heterocyclyl and “heterocyclic ring” includes 4- to 10-membered monocyclic and bicyclic saturated rings, e.g. 4- to 7-membered monocyclic saturated rings, containing up to three heteroatoms selected from N, O and S.
- heterocyclic rings examples include oxetane, tetrahydrofuran, tetrahydropyran, oxepane, oxocane, thietane, tetrahydrothiophene, tetrahydrothiopyran, thiepane, thiocane, azetidine, pyrrolidine, piperidine, azepane, azocane, [l,3]dioxane, oxazolidine, piperazine, and the like.
- Other examples of heterocyclic rings include the oxidised forms of the sulfur-containing rings.
- heteroaryl includes mono- and bicyclic 5- to 10- membered, e.g. monocyclic 5- or 6-membered, heteroaryl rings containing up to 4 heteroatoms selected from N, O and S.
- heteroaryl rings are furyl, thienyl, pyrrolyl, pyrazolyl, imidazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl, pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl and triazinyl.
- Bicyclic heteroaryl groups include bicyclic heteroaromatic groups where a 5- or 6-membered heteroaryl ring is fused to a phenyl or another heteroaromatic group.
- bicyclic heteroaromatic rings examples include benzofuran, benzothiophene, indole, benzoxazole, benzothiazole, indazole, benzimidazole, benzotriazole, quinoline, isoquinoline, quinazoline, quinoxaline and purine.
- Compounds described herein may contain one or more asymmetric centers and may thus give rise to diastereomers and optical isomers.
- the present invention includes all such possible diastereomers as well as their racemic mixtures, their substantially pure resolved enantiomers, all possible geometric isomers, and pharmaceutically acceptable salts thereof.
- the above formula (I) is shown without a definitive stereochemistry at certain positions.
- the present invention includes all stereoisomers of formula (I) and pharmaceutically acceptable salts thereof. Further, mixtures of stereoisomers as well as isolated specific stereoisomers are also included. During the course of the synthetic procedures used to prepare such compounds, or in using racemization or epimerization procedures known to those skilled in the art, the products of such procedures can be a mixture of stereoisomers.
- the present invention includes any possible tautomers and pharmaceutically acceptable salts thereof, and mixtures thereof, except where specifically drawn or stated otherwise.
- the present invention includes any possible solvates and polymorphic forms.
- a type of a solvent that forms the solvate is not particularly limited so long as the solvent is pharmacologically acceptable.
- water, ethanol, propanol, acetone or the like can be used.
- salts refers to salts prepared from pharmaceutically acceptable non-toxic bases or acids.
- pharmaceutically acceptable non-toxic bases including inorganic bases and organic bases.
- Salts derived from such inorganic bases include aluminum, ammonium, calcium, copper (ic and ous), ferric, ferrous, lithium, magnesium, potassium, sodium, zinc and the like salts. Particularly preferred are the ammonium, calcium, magnesium, potassium and sodium salts.
- Salts derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary, and tertiary amines, as well as cyclic amines and substituted amines such as naturally occurring and synthesized substituted amines.
- organic non-toxic bases from which salts can be formed include arginine, betaine, caffeine, choline, N'J ⁇ - dibenzylethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylenediamine, N-ethylmorpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, hydrabamine, isopropylamine, lysine, methylglucamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethylamine, trimethylamine, tripropylamine, tromethamine and the like.
- the compound of the present invention When the compound of the present invention is basic, its corresponding salt can be conveniently prepared from pharmaceutically acceptable non-toxic acids, including inorganic and organic acids.
- acids include, for example, acetic, benzenesulfonic, benzoic, camphorsulfonic, citric, ethanesulfonic, fumaric, gluconic, glutamic, hydrobromic, hydrochloric, isethionic, lactic, maleic, malic, mandelic, methanesulfonic, mucic, nitric, pamoic, pantothenic, phosphoric, succinic, sulfuric, tartaric, p-toluenesulfonic acid and the like
- the compounds of formula (I) are intended for pharmaceutical use they are preferably provided in substantially pure form, for example at least 60% pure, more suitably at least 75% pure, especially at least 98% pure (% are on a weight for weight basis).
- the compounds of formula (I) can be prepared as described below, in which R 1 , R 2 , A, B and V are as defined above.
- Compounds of formula (II) may be prepared by oxidation of a compound of formula (IV), using e.g. selenium dioxide in a suitable solvent such as dioxane at elevated temperature:
- Amines of formula (III) are either commercially available or may be prepared by techniques known to those skilled in the art.
- Compounds of formula (I) wherein V represents a nitrogen containing heterocycle having a N atom adjacent to the point of attachment of group -B-R 2 may be prepared by reaction of a compound of formula (VI) wherein X represents halo, e.g. bromo, with an amine of formula (III) in a solvent such as DMF in the presence of a base e.g. DIPEA:
- the compounds of formula (I) may be prepared singly or as compound libraries comprising at least 2, for example 5 to 1,000, compounds and more preferably 10 to 100 compounds of formula (I).
- Compound libraries may be prepared by a combinatorial "split and mix” approach or by multiple parallel synthesis using either solution or solid phase chemistry, using procedures known to those skilled in the art.
- labile functional groups in the intermediate compounds e.g. hydroxy, carboxy and amino groups
- the protecting groups may be removed at any stage in the synthesis of the compounds of formula (I) or may be present on the final compound of formula (I).
- a comprehensive discussion of the ways in which various labile functional groups may be protected and methods for cleaving the resulting protected derivatives is given in, for example, Protective Groups in Organic Chemistry, T. W. Greene and P.G.M. Wuts, (1991) Wiley-Interscience, New York, 2 nd edition.
- the compounds of formula (I) are useful as GPRl 16 agonists, e.g. for the treatment and/or prophylaxis of obesity and diabetes.
- the compounds of formula (I) will generally be administered in the form of a pharmaceutical composition.
- the invention also provides a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, for use as a pharmaceutical.
- the invention also provides a pharmaceutical composition
- a pharmaceutical composition comprising a compound of formula (I), including the compounds of provisos a) and b), in combination with a pharmaceutically acceptable carrier.
- composition is comprised of a pharmaceutically acceptable carrier and a non-toxic therapeutically effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- the invention also provides a pharmaceutical composition for the treatment of disease by modulating GPRl 16, resulting in the prophylactic or therapeutic treatment of obesity, e.g. by regulating satiety, or for the treatment of diabetes, comprising a pharmaceutically acceptable carrier and a non-toxic therapeutically effective amount of compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- the pharmaceutical compositions may optionally comprise other therapeutic ingredients or adjuvants.
- the compositions include compositions suitable for oral, rectal, topical, and parenteral (including subcutaneous, intramuscular, and intravenous) administration, although the most suitable route in any given case will depend on the particular host, and nature and severity of the conditions for which the active ingredient is being administered.
- the pharmaceutical compositions may be conveniently presented in unit dosage form and prepared by any of the methods well known in the art of pharmacy.
- the compounds of formula (I), or pharmaceutically acceptable salts thereof can be combined as the active ingredient in intimate admixture with a pharmaceutical carrier according to conventional pharmaceutical compounding techniques.
- the carrier may take a wide variety of forms depending on the form of preparation desired for administration, e.g. oral or parenteral (including intravenous).
- compositions can be presented as discrete units suitable for oral administration such as capsules, cachets or tablets each containing a predetermined amount of the active ingredient. Further, the compositions can be presented as a powder, as granules, as a solution, as a suspension in an aqueous liquid, as a non-aqueous liquid, as an oil-in-water emulsion, or as a water-in-oil liquid emulsion.
- the compound of formula (I), or a pharmaceutically acceptable salt thereof may also be administered by controlled release means and/or delivery devices.
- the compositions may be prepared by any of the methods of pharmacy.
- such methods include a step of bringing into association the active ingredient with the carrier that constitutes one or more necessary ingredients.
- the compositions are prepared by uniformly and intimately admixing the active ingredient with liquid carriers or finely divided solid carriers or both. The product can then be conveniently shaped into the desired presentation.
- the compounds of formula (I), including the compounds of provisos a) and b), or pharmaceutically acceptable salts thereof, can also be included in pharmaceutical compositions in combination with one or more other therapeutically active compounds.
- the pharmaceutical carrier employed can be, for example, a solid, liquid, or gas.
- solid carriers include lactose, terra alba, sucrose, talc, gelatin, agar, pectin, acacia, magnesium stearate, and stearic acid.
- liquid carriers are sugar syrup, peanut oil, olive oil, and water.
- gaseous carriers include carbon dioxide and nitrogen.
- any convenient pharmaceutical media may be employed.
- water, glycols, oils, alcohols, flavoring agents, preservatives, coloring agents, and the like may be used to form oral liquid preparations such as suspensions, elixirs and solutions; while carriers such as starches, sugars, microcrystalline cellulose, diluents, granulating agents, lubricants, binders, disintegrating agents, and the like may be used to form oral solid preparations such as powders, capsules and tablets. Because of their ease of administration, tablets and capsules are the preferred oral dosage units whereby solid pharmaceutical carriers are employed.
- tablets may be coated by standard aqueous or nonaqueous techniques.
- a tablet containing the composition of this invention may be prepared by compression or molding, optionally with one or more accessory ingredients or adjuvants.
- Compressed tablets may be prepared by compressing, in a suitable machine, the active ingredient in a free-flowing form such as powder or granules, optionally mixed with a binder, lubricant, inert diluent, surface active or dispersing agent. Molded tablets may be made by molding in a suitable machine, a mixture of the powdered compound moistened with an inert liquid diluent.
- Each tablet preferably contains from about 0.05mg to about 5g of the active ingredient and each cachet or capsule preferably containing from about 0.05mg to about 5g of the active ingredient.
- a formulation intended for the oral administration to humans may contain from about 0.5mg to about 5g of active agent, compounded with an appropriate and convenient amount of carrier material which may vary from about 5 to about 95 percent of the total composition.
- Unit dosage forms will generally contain between from about lmg to about 2g of the active ingredient, typically 25mg, 50mg, lOOmg, 200mg, 300mg, 400mg, 500mg, 600mg, 800mg, or lOOOmg.
- Pharmaceutical compositions of the present invention suitable for parenteral administration may be prepared as solutions or suspensions of the active compounds in water.
- a suitable surfactant can be included such as, for example, hydroxypropylcellulose.
- Dispersions can also be prepared in glycerol, liquid polyethylene glycols, and mixtures thereof in oils. Further, a preservative can be included to prevent the detrimental growth of microorganisms.
- Pharmaceutical compositions of the present invention suitable for injectable use include sterile aqueous solutions or dispersions. Furthermore, the compositions can be in the form of sterile powders for the extemporaneous preparation of such sterile injectable solutions or dispersions. In all cases, the final injectable form must be sterile and must be effectively fluid for easy syringability.
- the pharmaceutical compositions must be stable under the conditions of manufacture and storage; thus, preferably should be preserved against the contaminating action of microorganisms such as bacteria and fungi.
- the carrier can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (e.g. glycerol, propylene glycol and liquid polyethylene glycol), vegetable oils, and suitable mixtures thereof.
- Pharmaceutical compositions of the present invention can be in a form suitable for topical use such as, for example, an aerosol, cream, ointment, lotion, dusting powder, or the like. Further, the compositions can be in a form suitable for use in transdermal devices. These formulations may be prepared, using a compound of formula (I), or a pharmaceutically acceptable salt thereof, via conventional processing methods.
- a cream or ointment is prepared by admixing hydrophilic material and water, together with about 5wt% to about 10wt% of the compound, to produce a cream or ointment having a desired consistency.
- compositions of this invention can be in a form suitable for rectal administration wherein the carrier is a solid. It is preferable that the mixture forms unit dose suppositories. Suitable carriers include cocoa butter and other materials commonly used in the art. The suppositories may be conveniently formed by first admixing the composition with the softened or melted carrier(s) followed by chilling and shaping in molds.
- the pharmaceutical formulations described above may include, as appropriate, one or more additional carrier ingredients such as diluents, buffers, flavoring agents, binders, surface-active agents, thickeners, lubricants, preservatives (including anti-oxidants) and the like.
- additional carrier ingredients such as diluents, buffers, flavoring agents, binders, surface-active agents, thickeners, lubricants, preservatives (including anti-oxidants) and the like.
- additional carrier ingredients such as diluents, buffers, flavoring agents, binders, surface-active agents, thickeners, lubricants, preservatives (including anti-oxidants) and the like.
- additional carrier ingredients such as diluents, buffers, flavoring agents, binders, surface-active agents, thickeners, lubricants, preservatives (including anti-oxidants) and the like.
- other adjuvants can be included to render the formulation isotonic with the blood of the intended recipient
- dosage levels on the order of 0.01mg/kg to about 150mg/kg of body weight per day are useful in the treatment of the above-indicated conditions, or alternatively about
- obesity may be effectively treated by the administration of from about 0.01 to 50mg of the compound per kilogram of body weight per day, or alternatively about 0.5mg to about 3.5g per patient per day.
- the compounds of formula (I), including the compounds of provisos a) and b), and pharmaceutically acceptable salts thereof, may be used in the treatment of diseases or conditions in which GPRl 16 plays a role.
- the invention also provides a method for the treatment of a disease or condition in which GPRl 16 plays a role comprising a step of administering to a subject in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- Diseases or conditions in which GPRl 16 plays a role include obesity and diabetes.
- the treatment of obesity is intended to encompass the treatment of diseases or conditions such as obesity and other eating disorders associated with excessive food intake e.g.
- the compounds of the invention may also be used for treating metabolic diseases such as metabolic syndrome (syndrome X), impaired glucose tolerance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low HDL levels and hypertension.
- metabolic syndrome simple X
- impaired glucose tolerance hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low HDL levels and hypertension.
- the invention also provides a method for the regulation of satiety comprising a step of administering to a subject in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- the invention also provides a method for the treatment of obesity comprising a step of administering to a subject in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- the invention also provides a method for the treatment of diabetes, including Type 1 and Type 2 diabetes, particularly type 2 diabetes, comprising a step of administering to a patient in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- a method for the treatment of diabetes including Type 1 and Type 2 diabetes, particularly type 2 diabetes, comprising a step of administering to a patient in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- the invention also provides a method for the treatment of metabolic syndrome (syndrome X), impaired glucose tolerance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low HDL levels or hypertension comprising a step of administering to a patient in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- metabolic syndrome sekunder X
- impaired glucose tolerance hyperlipidemia
- hypertriglyceridemia hypercholesterolemia
- low HDL levels or hypertension comprising a step of administering to a patient in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
- the invention also provides a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, for use in the treatment of a condition as defined above.
- the invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for the treatment of a condition as defined above.
- treatment includes both therapeutic and prophylactic treatment.
- the compounds of formula (I), including the compounds of provisos a) and b), or pharmaceutically acceptable salts thereof, may be administered alone or in combination with one or more other therapeutically active compounds.
- the other therapeutically active compounds may be for the treatment of the same disease or condition as the compounds of formula (I) or a different disease or condition.
- the therapeutically active compounds may be administered simultaneously, sequentially or separately.
- the compounds of formula (I) may be administered with other active compounds for the treatment of obesity and/or diabetes, for example insulin and insulin analogs, gastric lipase inhibitors, pancreatic lipase inhibitors, sulfonyl ureas and analogs, biguanides, ⁇ 2 agonists, glitazones, PPAR- ⁇ agonists, mixed PPAR- ⁇ / ⁇ agonists, RXR agonists, fatty acid oxidation inhibitors, ⁇ -glucosidase inhibitors, ⁇ -agonists, phosphodiesterase inhibitors, lipid lowering agents, glycogen phosphorylase inhibitors, antiobesity agents e.g.
- pancreatic lipase inhibitors MCH-I antagonists and CB-I antagonists (or inverse agonists), amylin antagonists, lipoxygenase inhibitors, somostatin analogs, glucokinase activators, glucagon antagonists, insulin signalling agonists, PTPlB inhibitors, gluconeogenesis inhibitors, antilypolitic agents,
- GSK inhibitors galanin receptor agonists, anorectic agents, CCK receptor agonists, leptin, serotonergic/dopaminergic antiobesity drugs, reuptake inhibitors e.g. sibutramine, CRF antagonists, CRF binding proteins, thyromimetic compounds, aldose reductase inhibitors, glucocorticoid receptor antagonists, NHE-I inhibitors or sorbitol dehydrogenase inhibitors.
- Combination therapy comprising the administration of a compound of formula (I), or a pharmaceutically acceptable salt thereof, and at least one other antiobesity agent represents a further aspect of the invention.
- the present invention also provides a method for the treatment of obesity in a mammal, such as a human, which method comprises administering an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent, to a mammal in need thereof.
- a mammal such as a human
- the invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent for the treatment of obesity.
- the invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in combination with another antiobesity agent, for the treatment of obesity.
- the compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and the other antiobesity agent(s) may be coadministered or administered sequentially or separately.
- Co-administration includes administration of a formulation which includes both the compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and the other antiobesity agent(s), or the simultaneous or separate administration of different formulations of each agent.
- a formulation which includes both the compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and the other antiobesity agent(s), or the simultaneous or separate administration of different formulations of each agent.
- coadministration of the two agents may be preferred.
- the invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent in the manufacture of a medicament for the treatment of obesity.
- the invention also provides a pharmaceutical composition
- a pharmaceutical composition comprising a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent, and a pharmaceutically acceptable carrier.
- the invention also encompasses the use of such compositions in the methods described above.
- GPRl 16 agonists are of particular use in combination with centrally acting antiobesity agents.
- the other antiobesity agent for use in the combination therapies according to this aspect of the invention is preferably a CB-I modulator, e.g. a CB-I antagonist or inverse agonist.
- CB-I modulators include SR141716 (rimonabant) and SLV-319 ((45)-(-)-3-(4- chlorophenyl)-N-methyl-N-[(4-chlorophenyl)sulfonyl]-4-phenyl-4,5-dihydro-lH-pyrazole-l- carboxamide); as well as those compounds disclosed in EP576357, EP656354, WO 03/018060, WO 03/020217, WO 03/020314, WO 03/026647, WO 03/026648, WO 03/027076, WO 03/040105, WO 03/051850, WO 03/051851, WO 03/053431, WO 03/063781, WO 03/
- GPRl 16 has been suggested to play a role
- diseases or conditions in which GPRl 16 has been suggested to play a role include those described in WO 00/50562 and US 6,468,756, for example cardiovascular disorders, hypertension, respiratory disorders, gestational abnormalities, gastrointestinal disorders, immune disorders, musculoskeletal disorders, depression, phobias, anxiety, mood disorders and Alzheimer's disease.
- Example 1 4- ⁇ [Methyl-(2-pyridin-4-ylpyrimidin-4-yl)-amino]methyl ⁇ piperidine-l- carboxylic acid tert-butyl ester
- the biological activity of the compounds of the invention may be tested in the following assay systems:
- yeast cell-based reporter assays have previously been described in the literature (e.g. see Miret J. J. et al, 2002, J. Biol. Chem., 277:6881-6887; Campbell R.M. et al, 1999, Bioorg. Med. Chem. Lett., 9:2413-2418; King K. et al, 1990, Science, 250:121-123); WO 99/14344; WO 00/12704; and US 6,100,042).
- yeast cells have been engineered such that the endogenous yeast G-alpha (GPAl) has been deleted and replaced with G-protein chimeras constructed using multiple techniques.
- yeast alpha-cell GPCR Ste3 has been deleted to allow for a homologous expression of a mammalian GPCR of choice.
- elements of the pheromone signaling transduction pathway which are conserved in eukaryotic cells (for example, the mitogen-activated protein kinase pathway), drive the expression of Fusl .
- ⁇ -galactosidase LacZ
- Fuslp Fusl promoter
- Yeast cells were transformed by an adaptation of the lithium acetate method described by Agatep et al, (Agatep, R. et al, 1998, Transformation of Saccharomyces cerevisiae by the lithium acetate/single-stranded carrier DNA/polyethylene glycol (LiAc/ss-DNA/PEG) protocol.
- yeast cells were grown overnight on yeast tryptone plates (YT).
- Carrier single-stranded DNA (lO ⁇ g), 2 ⁇ g of each of two Fuslp- LacZ reporter plasmids (one with URA selection marker and one with TRP), 2 ⁇ g of GPRl 16 (human or mouse receptor) in yeast expression vector (2 ⁇ g origin of replication) and a lithium acetate/ polyethylene glycol/ TE buffer was pipetted into an Eppendorf tube.
- the yeast expression plasmid containing the receptor/ no receptor control has a LEU marker. Yeast cells were inoculated into this mixture and the reaction proceeds at 30 0 C for 60min.
- the yeast cells were then heat-shocked at 42 0 C for 15min. The cells were then washed and spread on selection plates.
- the selection plates are synthetic defined yeast media minus LEU, URA and TRP (SD- LUT). After incubating at 30 0 C for 2-3 days, colonies that grow on the selection plates were then tested in the LacZ assay.
- yeast cells carrying the human or mouse GPRl 16 receptor were grown overnight in liquid SD-LUT medium to an unsaturated concentration (i.e. the cells were still dividing and had not yet reached stationary phase). They were diluted in fresh medium to an optimal assay concentration and 90 ⁇ l of yeast cells are added to 96-well black polystyrene plates (Costar). Compounds, dissolved in DMSO and diluted in a 10% DMSO solution to 1OX concentration, were added to the plates and the plates placed at 30 0 C for 4h. After 4h, the substrate for the ⁇ -galactosidase was added to each well.
- Fluorescein di ⁇ -D-galactopyranoside
- FDG Fluorescein di
- a substrate for the enzyme that releases fluorescein allowing a fiuorimetric read-out.
- 20 ⁇ l per well of 500 ⁇ M FDG/2.5% Triton XlOO was added (the detergent was necessary to render the cells permeable).
- 20 ⁇ l per well of IM sodium carbonate was added to terminate the reaction and enhance the fluorescent signal.
- the plates were then read in a fiuorimeter at 485/535nm.
- cAMP cyclic AMP
- the cells monolayers were washed with phosphate buffered saline and stimulated at 37 0 C for 30min with various concentrations of compound in stimulation buffer plus 1% DMSO. Cells were then lysed and cAMP content determined using the Perkin Elmer AlphaScreenTM (Amplified Luminescent Proximity Homogeneous Assay) cAMP kit. Buffers and assay conditions were as described in the manufacturer's protocol.
- Test compounds and reference compounds are dosed by appropriate routes of administration (e.g. intraperitoneally or orally) and measurements made over the following 24 h.
- Rats are individually housed in polypropylene cages with metal grid floors at a temperature of 21 ⁇ 4°C and 55 ⁇ 20% humidity. Polypropylene trays with cage pads are placed beneath each cage to detect any food spillage. Animals are maintained on a reverse phase light-dark cycle (lights off for 8 h from 09.30-17.30 h) during which time the room was illuminated by red light.
- Animals have free access to a standard powdered rat diet and tap water during a two week acclimatization period.
- the diet is contained in glass feeding jars with aluminum lids. Each Kd has a 3-4 cm hole in it to allow access to the food.
- Animals, feeding jars and water bottles are weighed (to the nearest 0.1 g) at the onset of the dark period. The feeding jars and water bottles are subsequently measured 1, 2, 4, 6 and 24 h after animals are dosed with a compound of the invention and any significant differences between the treatment groups at baseline compared to vehicle-treated controls.
- Cell Culture HIT-T15 cells may be obtained from ATCC, and cultured in RPMI1640 medium supplemented with 10% fetal calf serum and 3OnM sodium selenite. All experiments should be performed with cells at less than passage 70, in accordance with the literature, which describes altered properties of this cell line at passage numbers above 81 (Zhang HJ, Walseth TF, Robertson RP. Insulin secretion and cAMP metabolism in HIT cells. Reciprocal and serial passage-dependent relationships. Diabetes. 1989 Jan;38(l):44-8).
- HIT-T15 cells are plated in standard culture medium in 96-well plates at 100,000 cells/ 0.1ml/ well and cultured for 24 hr and the medium then discarded. Cells are incubated for 15min at room temperature with lOO ⁇ l stimulation buffer (Hanks buffered salt solution, 5mM HEPES,
- reaction is set up containing 8 ⁇ l sample, 5 ⁇ l acceptor bead mix and 12 ⁇ l detection mix, such that the concentration of the final reaction components is the same as stated in the kit instructions. Reactions are incubated at room temperature for 150min, and the plate read using a Packard
- HIT-T 15 cells are plated in standard culture medium in 12-well plates at 106 cells/ 1 ml/ well and cultured for 3 days and the medium then discarded. Cells are washed x 2 with supplemented Krebs-Ringer buffer (KRB) containing 119 mM NaCl, 4.74 mM KCl, 2.54 mM CaCl 2 , 1.19 mM MgSO 4 , 1.19 mM KH 2 PO 4 , 25 mM NaHCO 3 , 1OmM HEPES at pH 7.4 and 0.1% bovine serum albumin. Cells are incubated with ImI KRB at 37 0 C for 30 min which is then discarded.
- KRB Krebs-Ringer buffer
Abstract
Compounds of formula (I): R1-A-V-B-R2 , wherein V is phenyl or a 6-membered heteroaryl ring containing up to three N-atoms, or pharmaceutically acceptable salts thereof, are agonists of GPR116 and are useful for the treatment of obesity, and for the treatment of diabetes.
Description
PYRIMIDINE DERIVATIVES AS GPCR AGONISTS
BACKGROUND OF THE INVENTION
The present invention is directed to G-protein coupled receptor (GPCR) agonists. In particular, the present invention is directed to agonists of GPRl 16 that are useful for the treatment of obesity, e.g. as regulators of satiety, and for the treatment of diabetes.
Obesity is characterized by an excessive adipose tissue mass relative to body size. Clinically, body fat mass is estimated by the body mass index (BMI; weight(kg)/height(m)2), or waist circumference. Individuals are considered obese when the BMI is greater than 30 and there are established medical consequences of being overweight. It has been an accepted medical view for some time that an increased body weight, especially as a result of abdominal body fat, is associated with an increased risk for diabetes, hypertension, heart disease, and numerous other health complications, such as arthritis, stroke, gallbladder disease, muscular and respiratory problems, back pain and even certain cancers. Pharmacological approaches to the treatment of obesity have been mainly concerned with reducing fat mass by altering the balance between energy intake and expenditure. Many studies have clearly established the link between adiposity and the brain circuitry involved in the regulation of energy homeostasis. Direct and indirect evidence suggest that serotonergic, dopaminergic, adrenergic, cholinergic, endocannabinoid, opioid, and histaminergic pathways in addition to many neuropeptide pathways (e.g. neuropeptide Y and melanocortins) are implicated in the central control of energy intake and expenditure. Hypothalamic centres are also able to sense peripheral hormones involved in the maintenance of body weight and degree of adiposity, such as insulin and leptin, and fat tissue derived peptides.
Drugs aimed at the pathophysiology associated with insulin dependent Type I diabetes and non-insulin dependent Type II diabetes have many potential side effects and do not adequately address the dyslipidaemia and hyperglycaemia in a high proportion of patients. Treatment is often focused at individual patient needs using diet, exercise, hypoglycaemic agents and insulin, but there is a continuing need for novel antidiabetic agents, particularly ones that may be better tolerated with fewer adverse effects. Similarly, metabolic syndrome (syndrome X) which is characterized by hypertension and its associated pathologies including atherosclerosis, lipidemia, hyperlipidemia and hypercholesterolemia have been associated with decreased insulin sensitivity which can lead to abnormal blood sugar levels when challenged. Myocardial ischemia and microvascular disease is an established morbidity associated with untreated or poorly controlled metabolic syndrome. There is a continuing need for novel antiobesity and antidiabetic agents, particularly ones that are well tolerated with few adverse effects.
GPRl 16 is a GPCR identified as SNORF25 in WO00/50562 which discloses both the human and rat receptors, US 6,468,756 also discloses the mouse receptor (accession numbers: AAN95194 (human), AAN95195 (rat) and ANN95196 (mouse)). In humans, GPRl 16 is expressed in the pancreas, small intestine, colon and adipose tissue. The expression profile of the human GPRl 16 receptor indicates its potential utility as a target for the treatment of obesity and diabetes.
International patent application WO2005/061489 (published after the priority date of the present application) discloses heterocyclic derivatives as GPRl 16 receptor agonists.
International patent application WO03/068236 discloses the compounds tert-butyl 4-(3- pyridin-4-ylbenzyl)piperidine-l-carboxylate and 4-(3-pyridin-4-ylbenzyl)piperidine as intermediates for the synthesis of 5HT- 1 receptor modulators, no pharmaceutical utility is suggested for these compounds. The present invention relates to agonists of GPRl 16 which are useful for the treatment of obesity, e.g. as regulators of satiety, and for the treatment of diabetes.
SUMMARY OF THE INVENTION
Compounds of formula (I):
R'-A-V-B-R2
(I)
or pharmaceutically acceptable salts thereof, are agonists of GPRl 16 and are useful for the prophylactic or therapeutic treatment of obesity, and for the treatment of diabetes.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is directed to a compound of formula (I), or a pharmaceutically acceptable salt thereof: R'-A-V-B-R2
(I)
wherein V is phenyl or a 6-membered heteroaryl ring containing up to three N atoms;
A is -CH=CH- or (CH2)n; B is -CH=CH- or (CH2),,, where one of the CH2 groups may be replaced by O, NR5,
S(O)n,, C(O) or C(O)NR12; n is independently 0, 1, 2 or 3; m is independently 0, 1 or 2;
R1 is 3- or 4-pyridyl, 4- or 5-pyrimidinyl or 2-pyrazinyl, any of which may be optionally substituted by one or more substituents selected from halo, C1-4 alkyl, C^ fiuoroalkyl, C2A alkenyl, C^alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)mR6, CON(R6);., N(R6)2, NR10COR6, NR10SO2R6, SO2N(R6)2, a 4- to 7-membered heterocyclyl group or a 5- or 6- membered heteroaryl group;
R2 is 4- to 7-membered cycloalkyl substituted by R3, C(O)OR3, C(O)R3 or S(O)2R3, or 4- to 7-membered heterocyclyl, containing one or two nitrogen atoms which is unsubstituted or substituted by C(O)OR4, C(O)R3, S(O)2R3, C(O)NHR4, P(O)(OR1 % or a 5- or 6-membered nitrogen containing heteroaryl group;
R3 is C3-8 alkyl, C3-8 alkenyl or C3-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, d_4 alkylC3.7 cycloalkyl, C^ alkylaryl, C^ alkylheterocyclyl or C^ alkylheteroaryl, any of which may be optionally substituted with one or more substituents selected from halo, Ci-4 alkyl, Ci-4 fiuoroalkyl, OR6, CN, CO2Ci_4 alkyl, N(R6)2 and NO2;
R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, C^4 alkylC3-7 cycloalkyl, C^ alkylaryl, C^ alkylheterocyclyl or C1-4 alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, Q-4 alkyl, Ci-4 fluoroalkyl, OR6, CN, CO2Ci-4 alkyl, N(R^2 and
NO2;
R5 is hydrogen, C(O)R7, S(O)2R8, C3-7 cycloalkyl or Ci-4 alkyl optionally substituted by OR6, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, Ci-2 alkyl, Ci-2 fluoroalkyl, OR6, CN, N(R6)2 and NO2;
R6 are independently hydrogen, C^4 alkyl, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR9, CN, SO2CH3, N(R10)2 and NO2; or a group N(R10)2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR10;
R7 is hydrogen, Ci-4 alkyl, OR6, N(R6)2, aryl or heteroaryl;
R8 is Ci-4 alkyl, Ci-4 fluoroalkyl, aryl or heteroaryl;
R9 is hydrogen, Ci-2 alkyl or Ci-2 fluoroalkyl;
R10 is hydrogen or Ci-4 alkyl; R11 is phenyl; and
R12 is hydrogen, Ci-4 alkyl or C3-7 cycloalkyl; provided that the compound is not: a) tert-butyl 4-(3-pyridin-4-ylbenzyl)piperidine-l-carboxylate; or b) 4-(3-pyridin-4-ylbenzyl)piperidine.
Examples of the group V include pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl and triazinyl.
In the compounds of formula (I) V may for example represent a 6-membered heteroaryl ring of the formula:
A " γA wherein one or two of W, X and Y are N and the others are CH.
Preferably the n groups of A and B do not both represent 0.
In A, n is preferably 0, 1 or 2, more preferably 0.
In B, n is preferably 2 or 3, more preferably 2. When one of the CH2 groups in B is replaced, it is preferably replaced by O, NR5, S(O)n, or C(O); more preferably it is replaced by O or NR5.
R1 is preferably 4-pyridyl optionally substituted by 1 or 2 halo, Ci-4 alkyl, Ci-4 fluoroalkyl, QM alkenyl, C2-4 alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6)2, N(R6)2, NR10COR6, NR10SO2R6, SO2N(R6), 4- to 7-membered heterocyclyl or 5- or 6-membered heteroaryl groups; more preferably 4-pyridyl optionally substituted by halo, Ci-4 alkyl, CM alkoxy or CN; even more preferably 4-pyridyl, optionally substituted by halo, Ci-4 alkyl or CN; and especially 4-pyridyl, optionally substituted by CN.
When R2 is a 4- to 7-membered heterocyclyl, containing one or two nitrogen atoms it is preferably substituted, the substitution is preferably on the nitrogen atom.
R2 is preferably a 4- to 7-membered cycloalkyl substituted by R3 or C(O)OR3, especially R3, or a 4- to 7-membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR4 or a 6-membered nitrogen containing heteroaryl group, more preferably a 4- to 7- membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR4.
R2 is more preferably a 4- to 7-membered cycloalkyl substituted by R3, or a 4- to 7- membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR4.
A particularly preferred R2 group is piperidinyl, especially 4-piperidinyl, which is substituted on the nitrogen atom by C(O)OR4.
R3 is preferably C3-8 alkyl which may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, more preferably R3 is C3-8 alkyl.
R4 is preferably C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, 5- to 6-membered heteroaryl containing one or two nitrogen atoms, Cμ alkylC3-7 cycloalkyl or Cμ alkylaryl, any of which may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR6 and C02Cμ alkyl.
More preferably R4 is C3-6 alkyl optionally substituted with up to 5 fluoro or chloro atoms, e.g. 3 fluoro or chloro atoms, and which may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl.
R6 is preferably hydrogen, Cμ alkyl or C3-7 cycloalkyl, more preferably Cμ alkyl.
R7 is preferably hydrogen or CM alkyl.
R8 is preferably Cμ alkyl or Cμ fluoroalkyl. A specific group of compounds of the invention which may be mentioned are those of formula (Ia), or a pharmaceutically acceptable salt thereof:
(Ia) wherein one or two of W, X and Y are N and the others are CH;
A is (CH2)n;
B is (CH2)n, where one of the CH2 groups may be replaced by O, NR6, S(O)m or C(O); n is independently 0, 1, 2 or 3; m is 0, 1 or 2; R1 is 3- or 4-pyridyl or 4-pyrimidinyl any of which may be optionally substituted by one or more substituents selected from halo, Cμ alkyl, Cμ fluoroalkyl, C3-7 cycloalkyl, OR5, CN, NO2, N(R6)2, CON(R6)2 or a 5- or 6-membered heteroaryl group;
R2 is 4- to 7-membered cycloalkyl substituted by R3, C(O)OR3, C(O)R3 or S(O)2R3, or 4- to 7-membered heterocyclyl, containing one or two nitrogen atoms, which is unsubstituted or substituted by C(O)OR4, C(O)R3 or S(O)2R3;
R3 is C3-7 alkyl, C3-7 alkenyl or C3-7 alkynyl any of which may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl or Cμ alkylaryl, wherein the aryl groups may be
substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR5, CN, N(R6)2 and NO2;
R4 is C2-7 alkyl, C2-7 alkenyl or C2-7 alkynyl any of which may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl or C1-4 alkylaryl, wherein the aryl groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR6,
CN, N(R6)2 and NO2;
R5 are independently hydrogen, CM alkyl or CM fluoroalkyl; and
R6 are independently hydrogen and CM alkyl.
A preferred group of compounds of the invention are the compounds of formula (Ib), and pharmaceutically acceptable salts thereof:
(Ib) wherein one or two of W, X and Y are N and the others are CH; A is -CH=CH- or (CH2)n;
B is -CH=CH- or (CH2)n, where one of the CH2 groups may be replaced by O, NR5, S(O)m or C(O); n is independently 0, 1, 2 or 3, provided that not both n are 0; m is independently 0, 1 or 2; Rx and Ry are independently selected from hydrogen, halo, CM alkyl, CM fluoroalkyl,
QM alkenyl, QM alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6)2, N(R6)2, NR10COR6, NR10SO2R6, SO2N(R6)2, a 4- to 7-membered heterocyclyl group and a 5- or 6- membered heteroaryl group;
Z is C(O)OR4, C(O)R3, S(O)2R3, C(O)NHR4 or a 5- or 6-membered nitrogen containing heteroaryl group;
R3 is C3-8 alkyl, C3-8 alkenyl or C3-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, CM alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or CM alkylheteroaryl, any of which may be optionally substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR6, CN, CO2CM alkyl, N(R6)2 and NO2;
R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, CM alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or CM alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR6, CN, CO2CM alkyl, N(R6)2 and NO2;
R6 are independently hydrogen, or CM alkyl, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR9, CN, SO2CH3, N(R10)2 and NO2; or a group N(R10)2
may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR10;
R9 is hydrogen, Ci-2 alkyl or Ci-2 fluoroalkyl; and
R10 is hydrogen or C1-4 alkyl.
A further preferred group of compounds of the invention are the compounds of formula (Ic), and pharmaceutically acceptable salts thereof:
(Ic) wherein W, X, Y, Z, A, B, Rx and Ry are as defined for formula (Ib).
A further preferred group of compounds of the invention are the compounds of formula (Id), and pharmaceutically acceptable salts thereof:
(Id) wherein one or two of W, X and Y are N and the others are CH; Q is O, NR5 or CH2;
R is hydrogen, halo, CM alkyl, CM fluoroalkyl, C2-4 alkenyl, C2-4 alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6);., N(R6J2, NR10COR6, NR10SO2R6,
SO2N(R6)2, a 4- to 7-membered heterocyclyl group or a 5- or 6-membered heteroaryl group;
R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, Q-4 alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or Ci-4 alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR6, CN, CO2CM alkyl, N(R^2 and NO2;
R5 is CM alkyl;
R6 are independently hydrogen, or CM alkyl, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR9, CN, SO2CH3, N(R10)2 and NO2; or a group N(R10)2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR10;
R9 is hydrogen, Ci-2 alkyl or Ci-2 fluoroalkyl; R10 is hydrogen or CM alkyl; and p is 0 or 1.
In the compounds of formula (Id) R is preferably hydrogen, halo, C^ alkyl, C^4 alkoxy or CN.
While the preferred groups for each variable have generally been listed above separately for each variable, preferred compounds of this invention include those in which several or each variable in formula (I) is selected from the preferred, more preferred or particularly listed groups for each variable. Therefore, this invention is intended to include all combinations of preferred, more preferred and particularly listed groups. The preferences listed above also apply, where applicable, to the compounds of formula (Ia) to (Id).
Specific compounds of the invention which may be mentioned are those included in the Examples and pharmaceutically acceptable salts thereof.
As used herein, unless stated otherwise, "alkyl" as well as other groups having the prefix "alk" such as, for example, alkenyl, alkynyl, and the like, means carbon chains which may be linear or branched or combinations thereof. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, sec- and tert-butyl, pentyl, hexyl, heptyl and the like. "Alkenyl", "alkynyl" and other like terms include carbon chains having at least one unsaturated carbon- carbon bond.
The term "fluoroalkyl" includes alkyl groups substituted by one or more fluorine atoms, e.g. CH2F, CHF2 and CF3.
The term "cycloalkyl" means carbocycles containing no heteroatoms, and includes monocyclic and bicyclic saturated and partially saturated carbocycles. Examples of cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl. Examples of partially saturated cycloalkyl groups include cyclohexene and indane. Cycloalkyl groups will typically contain 3 to 10 ring carbon atoms in total (e.g. 3 to 6, or 8 to 10).
The term "halo" includes fluorine, chlorine, bromine, and iodine atoms. The term "aryl" includes phenyl and naphthyl, in particular phenyl.
Unless otherwise indicated the term "heterocyclyl" and "heterocyclic ring" includes 4- to 10-membered monocyclic and bicyclic saturated rings, e.g. 4- to 7-membered monocyclic saturated rings, containing up to three heteroatoms selected from N, O and S. Examples of heterocyclic rings include oxetane, tetrahydrofuran, tetrahydropyran, oxepane, oxocane, thietane, tetrahydrothiophene, tetrahydrothiopyran, thiepane, thiocane, azetidine, pyrrolidine, piperidine, azepane, azocane, [l,3]dioxane, oxazolidine, piperazine, and the like. Other examples of heterocyclic rings include the oxidised forms of the sulfur-containing rings. Thus, tetrahydrothiophene 1 -oxide, tetrahydrothiophene 1,1 -dioxide, tetrahydrothiopyran 1 -oxide, and tetrahydrothiopyran 1,1 -dioxide are also considered to be heterocyclic rings. Unless otherwise stated, the term "heteroaryl" includes mono- and bicyclic 5- to 10- membered, e.g. monocyclic 5- or 6-membered, heteroaryl rings containing up to 4 heteroatoms selected from N, O and S. Examples of such heteroaryl rings are furyl, thienyl, pyrrolyl, pyrazolyl, imidazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl, pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl and triazinyl. Bicyclic heteroaryl groups include bicyclic heteroaromatic groups where a 5- or 6-membered heteroaryl ring is fused to a phenyl or another heteroaromatic group. Examples of such bicyclic heteroaromatic rings are benzofuran, benzothiophene, indole, benzoxazole, benzothiazole, indazole, benzimidazole, benzotriazole, quinoline, isoquinoline, quinazoline, quinoxaline and purine.
Compounds described herein may contain one or more asymmetric centers and may thus give rise to diastereomers and optical isomers. The present invention includes all such possible diastereomers as well as their racemic mixtures, their substantially pure resolved enantiomers, all possible geometric isomers, and pharmaceutically acceptable salts thereof. The above formula (I) is shown without a definitive stereochemistry at certain positions. The present invention includes all stereoisomers of formula (I) and pharmaceutically acceptable salts thereof. Further, mixtures of stereoisomers as well as isolated specific stereoisomers are also included. During the course of the synthetic procedures used to prepare such compounds, or in using racemization or epimerization procedures known to those skilled in the art, the products of such procedures can be a mixture of stereoisomers.
When a tautomer of the compound of formula (I) exists, the present invention includes any possible tautomers and pharmaceutically acceptable salts thereof, and mixtures thereof, except where specifically drawn or stated otherwise.
When the compound of formula (I) and pharmaceutically acceptable salts thereof exist in the form of solvates or polymorphic forms, the present invention includes any possible solvates and polymorphic forms. A type of a solvent that forms the solvate is not particularly limited so long as the solvent is pharmacologically acceptable. For example, water, ethanol, propanol, acetone or the like can be used.
The term "pharmaceutically acceptable salts" refers to salts prepared from pharmaceutically acceptable non-toxic bases or acids. When the compound of the present invention is acidic, its corresponding salt can be conveniently prepared from pharmaceutically acceptable non-toxic bases, including inorganic bases and organic bases. Salts derived from such inorganic bases include aluminum, ammonium, calcium, copper (ic and ous), ferric, ferrous, lithium, magnesium, potassium, sodium, zinc and the like salts. Particularly preferred are the ammonium, calcium, magnesium, potassium and sodium salts. Salts derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary, and tertiary amines, as well as cyclic amines and substituted amines such as naturally occurring and synthesized substituted amines. Other pharmaceutically acceptable organic non-toxic bases from which salts can be formed include arginine, betaine, caffeine, choline, N'JΨ- dibenzylethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylenediamine, N-ethylmorpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, hydrabamine, isopropylamine, lysine, methylglucamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethylamine, trimethylamine, tripropylamine, tromethamine and the like. When the compound of the present invention is basic, its corresponding salt can be conveniently prepared from pharmaceutically acceptable non-toxic acids, including inorganic and organic acids. Such acids include, for example, acetic, benzenesulfonic, benzoic, camphorsulfonic, citric, ethanesulfonic, fumaric, gluconic, glutamic, hydrobromic, hydrochloric, isethionic, lactic, maleic, malic, mandelic, methanesulfonic, mucic, nitric, pamoic, pantothenic, phosphoric, succinic, sulfuric, tartaric, p-toluenesulfonic acid and the like
Since the compounds of formula (I) are intended for pharmaceutical use they are preferably provided in substantially pure form, for example at least 60% pure, more suitably at least 75% pure, especially at least 98% pure (% are on a weight for weight basis).
The compounds of formula (I) can be prepared as described below, in which R1, R2, A, B and V are as defined above.
Compounds of formula (I) wherein B represents -CH2-NR5-B'- can be prepared as shown in Scheme 1 by reaction of a compound of formula (II) with an amine of formula (III) under reductive amination conditions known to those skilled in the art, e.g. using dichloromethane as solvent and sodium triacetoxyborohydride as reducing agent.
Scheme 1
.,CHO HR .R2
R + * R ^R2
(H) (III) (I)
Compounds of formula (II) may be prepared by oxidation of a compound of formula (IV), using e.g. selenium dioxide in a suitable solvent such as dioxane at elevated temperature:
R1/A \V/CH3
(IV)
Amines of formula (III) are either commercially available or may be prepared by techniques known to those skilled in the art.
Compounds of formula (IV) where V is pyrimidine may be prepared as shown in Scheme 2 by reaction of a compound of formula (V) with e.g. acetylacetaldehyde dimethylacetate and a base such as DBU in a solvent such as DMF at elevated temperature:
Scheme 2
Compounds of formula (I) wherein V represents a nitrogen containing heterocycle having a N atom adjacent to the point of attachment of group -B-R2 may be prepared by reaction of a compound of formula (VI) wherein X represents halo, e.g. bromo, with an amine of formula (III) in a solvent such as DMF in the presence of a base e.g. DIPEA:
(Vl)
Compounds of formula (I) may also be prepared as shown in Scheme 3 by reaction of a boronic acid ester of formula (VII) and a compound of formula (VIII) wherein X is halo e.g.
bromo using an appropriate catalysts such as palladium (tetrakis)triphenylphosphine in a suitable solvent such as toluene in the presence of a base e.g. sodium carbonate:
Scheme 3
(VM) (VIII) (I)
Compounds of formula (I) in which R2 contains either a carbamate or a sulfonamide group may be synthesised as described in Scheme 4. Compounds of formula (IX), in which P represents a suitable protecting group, for example tert-butoxycarbonyl (Boc), may be synthesised as outlined above. The protecting group is firstly removed under suitable conditions to afford compounds of formula (X). In the case of the Boc group this can be achieved by treatment of compounds of formula (IX) with a suitable acid, such as trifluoroacetic acid, in an appropriate solvent, such as CH2Cl2. Treatment of compounds of formula (X) with chloroformates of formula (XI), which are generally commercially available or can be readily synthesised, in a suitable solvent, such as CH2Cl2, in the presence of a suitable base, such as triethylamine, affords compounds of formula (I). Similarly, compounds of formula (X) may be reacted with sulfonyl chlorides of formula (XII), which are generally commercially available or can readily be synthesised, in a suitable solvent, such as CH2Cl2, in the presence of a suitable base, such as triethylamine, to afford compounds of formula (I). Compounds of formula (I) in which R2 contains a urea moiety may be prepared by reacting a compound of formula (X) with an isocyanate of formula O=C=N-R4. Furthermore, compounds of formula (I) in which R2 is 4- 7-membered heterocyclyl substituted with a heteroaryl group may be prepared by reacting the amine (X) with the appropriate heteroaryl chloride or bromide under Pd(O) catalysis in the presence of a suitable ligand and base (Urgaonkar, S.; Hu, J.-H.; Verkade, J. G. J. Org. Chem. 2003, 68, 8416-8423).
Scheme 4
Compounds of formula (I) in which R2 contains an amide group may be synthesised from compounds of formula (X) and a suitable acid (R3COOH), or activated derivative thereof, in an amide bond forming reaction.
Compounds of formula (I) where R2 contains an ester moiety may be synthesised as illustrated in Scheme 5. Compounds of formula (XIII) in which R is an alkyl group, for example a methyl group, may be synthesised using procedures described above. The alkyl group is firstly removed under appropriate conditions to afford compounds of formula (XIV). For example, when R = Me compounds of formula (XIII) may be generated in the presence of a suitable base,
for example LiOH, in a suitable solvent, such as water-methanol. The acids of formula (XIV) are then condensed with alcohols of formula (XV), which are commercially available or can be synthesised using known techniques. The condensation may be achieved by, for example, heating compounds of formula (XIV) with alcohols of formula (XV) in the presence of thionyl chloride, giving rise to compounds of formula (I).
Scheme 5
Compounds of formula (I) where R3 contains an ether group may also be synthesised from compounds of formula (XIII) as illustrated in Scheme 6. Compounds of formula (XIII) may be converted to the corresponding alcohol (XVI) by the action of a suitable reducing agent, for example diisobutylaluminium hydride, in a suitable solvent, such as CH2Cl2 and can then be treated firstly with a suitable base, such as sodium hydride, in a suitable solvent, such as THF, followed by an appropriate alkylating agent, such as an alkyl halide of formula (XVII) to afford compounds of formula (I).
Scheme 6
Compounds of formula (I) where B contains a NR5 group where R5 is hydrogen can be further transformed into compounds of formula (I) where R5 is C(O)R7, S(O)2R8, or an optionally substituted
alkyl group using standard techniques known to those with skill in the art for acylation, sulfonylation and reductive amination respectively. Compounds of the formula (I) where R1 is pyridyl optionally substituted with CN can be prepared from the corresponding unsubstituted pyridine by the Reissert reaction (Fife, W. K. J.
Org. Chem. 1983, 48, 1375-1377). Similar reactions can be used to prepare the compounds where R1 is pyridyl optionally substituted with halogen (Walters, M. A.; Shay, J. J. Tetrahedron
Lett. 1995, 36, 7575-7578). The compounds where R1 is pyridyl optionally substituted with halogen can be transformed into the corresponding compounds where R1 is pyridyl optionally substituted with C1-4 alkyl by transition metal-catalysed cross-coupling reactions (Fύrstner, A., et al. J. Am. Chem. Soc. 2002, 124, 13856-13863).
Other compounds of formula (I) may be prepared by methods analogous to those described above or by methods known per se. Further details for the preparation of the compounds of formula (I) are found in the examples.
The compounds of formula (I) may be prepared singly or as compound libraries comprising at least 2, for example 5 to 1,000, compounds and more preferably 10 to 100
compounds of formula (I). Compound libraries may be prepared by a combinatorial "split and mix" approach or by multiple parallel synthesis using either solution or solid phase chemistry, using procedures known to those skilled in the art.
During the synthesis of the compounds of formula (I), labile functional groups in the intermediate compounds, e.g. hydroxy, carboxy and amino groups, may be protected. The protecting groups may be removed at any stage in the synthesis of the compounds of formula (I) or may be present on the final compound of formula (I). A comprehensive discussion of the ways in which various labile functional groups may be protected and methods for cleaving the resulting protected derivatives is given in, for example, Protective Groups in Organic Chemistry, T. W. Greene and P.G.M. Wuts, (1991) Wiley-Interscience, New York, 2nd edition.
Any novel intermediates as defined above are also included within the scope of the invention.
As indicated above the compounds of formula (I) are useful as GPRl 16 agonists, e.g. for the treatment and/or prophylaxis of obesity and diabetes. For such use the compounds of formula (I) will generally be administered in the form of a pharmaceutical composition.
The invention also provides a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, for use as a pharmaceutical.
The invention also provides a pharmaceutical composition comprising a compound of formula (I), including the compounds of provisos a) and b), in combination with a pharmaceutically acceptable carrier.
Preferably the composition is comprised of a pharmaceutically acceptable carrier and a non-toxic therapeutically effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
Moreover, the invention also provides a pharmaceutical composition for the treatment of disease by modulating GPRl 16, resulting in the prophylactic or therapeutic treatment of obesity, e.g. by regulating satiety, or for the treatment of diabetes, comprising a pharmaceutically acceptable carrier and a non-toxic therapeutically effective amount of compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof. The pharmaceutical compositions may optionally comprise other therapeutic ingredients or adjuvants. The compositions include compositions suitable for oral, rectal, topical, and parenteral (including subcutaneous, intramuscular, and intravenous) administration, although the most suitable route in any given case will depend on the particular host, and nature and severity of the conditions for which the active ingredient is being administered. The pharmaceutical compositions may be conveniently presented in unit dosage form and prepared by any of the methods well known in the art of pharmacy.
In practice, the compounds of formula (I), or pharmaceutically acceptable salts thereof, can be combined as the active ingredient in intimate admixture with a pharmaceutical carrier according to conventional pharmaceutical compounding techniques. The carrier may take a wide variety of forms depending on the form of preparation desired for administration, e.g. oral or parenteral (including intravenous).
Thus, the pharmaceutical compositions can be presented as discrete units suitable for oral administration such as capsules, cachets or tablets each containing a predetermined amount of the active ingredient. Further, the compositions can be presented as a powder, as granules, as
a solution, as a suspension in an aqueous liquid, as a non-aqueous liquid, as an oil-in-water emulsion, or as a water-in-oil liquid emulsion. In addition to the common dosage forms set out above, the compound of formula (I), or a pharmaceutically acceptable salt thereof, may also be administered by controlled release means and/or delivery devices. The compositions may be prepared by any of the methods of pharmacy. In general, such methods include a step of bringing into association the active ingredient with the carrier that constitutes one or more necessary ingredients. In general, the compositions are prepared by uniformly and intimately admixing the active ingredient with liquid carriers or finely divided solid carriers or both. The product can then be conveniently shaped into the desired presentation. The compounds of formula (I), including the compounds of provisos a) and b), or pharmaceutically acceptable salts thereof, can also be included in pharmaceutical compositions in combination with one or more other therapeutically active compounds.
The pharmaceutical carrier employed can be, for example, a solid, liquid, or gas. Examples of solid carriers include lactose, terra alba, sucrose, talc, gelatin, agar, pectin, acacia, magnesium stearate, and stearic acid. Examples of liquid carriers are sugar syrup, peanut oil, olive oil, and water. Examples of gaseous carriers include carbon dioxide and nitrogen.
In preparing the compositions for oral dosage form, any convenient pharmaceutical media may be employed. For example, water, glycols, oils, alcohols, flavoring agents, preservatives, coloring agents, and the like may be used to form oral liquid preparations such as suspensions, elixirs and solutions; while carriers such as starches, sugars, microcrystalline cellulose, diluents, granulating agents, lubricants, binders, disintegrating agents, and the like may be used to form oral solid preparations such as powders, capsules and tablets. Because of their ease of administration, tablets and capsules are the preferred oral dosage units whereby solid pharmaceutical carriers are employed. Optionally, tablets may be coated by standard aqueous or nonaqueous techniques.
A tablet containing the composition of this invention may be prepared by compression or molding, optionally with one or more accessory ingredients or adjuvants. Compressed tablets may be prepared by compressing, in a suitable machine, the active ingredient in a free-flowing form such as powder or granules, optionally mixed with a binder, lubricant, inert diluent, surface active or dispersing agent. Molded tablets may be made by molding in a suitable machine, a mixture of the powdered compound moistened with an inert liquid diluent. Each tablet preferably contains from about 0.05mg to about 5g of the active ingredient and each cachet or capsule preferably containing from about 0.05mg to about 5g of the active ingredient.
For example, a formulation intended for the oral administration to humans may contain from about 0.5mg to about 5g of active agent, compounded with an appropriate and convenient amount of carrier material which may vary from about 5 to about 95 percent of the total composition. Unit dosage forms will generally contain between from about lmg to about 2g of the active ingredient, typically 25mg, 50mg, lOOmg, 200mg, 300mg, 400mg, 500mg, 600mg, 800mg, or lOOOmg. Pharmaceutical compositions of the present invention suitable for parenteral administration may be prepared as solutions or suspensions of the active compounds in water. A suitable surfactant can be included such as, for example, hydroxypropylcellulose. Dispersions can also be prepared in glycerol, liquid polyethylene glycols, and mixtures thereof in oils. Further, a preservative can be included to prevent the detrimental growth of microorganisms.
Pharmaceutical compositions of the present invention suitable for injectable use include sterile aqueous solutions or dispersions. Furthermore, the compositions can be in the form of sterile powders for the extemporaneous preparation of such sterile injectable solutions or dispersions. In all cases, the final injectable form must be sterile and must be effectively fluid for easy syringability. The pharmaceutical compositions must be stable under the conditions of manufacture and storage; thus, preferably should be preserved against the contaminating action of microorganisms such as bacteria and fungi. The carrier can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (e.g. glycerol, propylene glycol and liquid polyethylene glycol), vegetable oils, and suitable mixtures thereof. Pharmaceutical compositions of the present invention can be in a form suitable for topical use such as, for example, an aerosol, cream, ointment, lotion, dusting powder, or the like. Further, the compositions can be in a form suitable for use in transdermal devices. These formulations may be prepared, using a compound of formula (I), or a pharmaceutically acceptable salt thereof, via conventional processing methods. As an example, a cream or ointment is prepared by admixing hydrophilic material and water, together with about 5wt% to about 10wt% of the compound, to produce a cream or ointment having a desired consistency.
Pharmaceutical compositions of this invention can be in a form suitable for rectal administration wherein the carrier is a solid. It is preferable that the mixture forms unit dose suppositories. Suitable carriers include cocoa butter and other materials commonly used in the art. The suppositories may be conveniently formed by first admixing the composition with the softened or melted carrier(s) followed by chilling and shaping in molds.
In addition to the aforementioned carrier ingredients, the pharmaceutical formulations described above may include, as appropriate, one or more additional carrier ingredients such as diluents, buffers, flavoring agents, binders, surface-active agents, thickeners, lubricants, preservatives (including anti-oxidants) and the like. Furthermore, other adjuvants can be included to render the formulation isotonic with the blood of the intended recipient. Compositions containing a compound of formula (I), or pharmaceutically acceptable salts thereof, may also be prepared in powder or liquid concentrate form.
Generally, dosage levels on the order of 0.01mg/kg to about 150mg/kg of body weight per day are useful in the treatment of the above-indicated conditions, or alternatively about
0.5mg to about 7g per patient per day. For example, obesity may be effectively treated by the administration of from about 0.01 to 50mg of the compound per kilogram of body weight per day, or alternatively about 0.5mg to about 3.5g per patient per day.
It is understood, however, that the specific dose level for any particular patient will depend upon a variety of factors including the age, body weight, general health, sex, diet, time of administration, route of administration, rate of excretion, drug combination and the severity of the particular disease undergoing therapy.
The compounds of formula (I), including the compounds of provisos a) and b), and pharmaceutically acceptable salts thereof, may be used in the treatment of diseases or conditions in which GPRl 16 plays a role.
Thus the invention also provides a method for the treatment of a disease or condition in which GPRl 16 plays a role comprising a step of administering to a subject in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
Diseases or conditions in which GPRl 16 plays a role include obesity and diabetes. In the context of the present application the treatment of obesity is intended to encompass the treatment of diseases or conditions such as obesity and other eating disorders associated with excessive food intake e.g. by reduction of appetite and body weight, maintenance of weight reduction and prevention of rebound and diabetes (including Type 1 and Type 2 diabetes, impaired glucose tolerance, insulin resistance and diabetic complications such as neuropathy, nephropathy, retinopathy, cataracts, cardiovascular complications and dyslipidaemia). And the treatment of patients who have an abnormal sensitivity to ingested fats leading to functional dyspepsia. The compounds of the invention may also be used for treating metabolic diseases such as metabolic syndrome (syndrome X), impaired glucose tolerance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low HDL levels and hypertension.
The invention also provides a method for the regulation of satiety comprising a step of administering to a subject in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof. The invention also provides a method for the treatment of obesity comprising a step of administering to a subject in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof. The invention also provides a method for the treatment of diabetes, including Type 1 and Type 2 diabetes, particularly type 2 diabetes, comprising a step of administering to a patient in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
The invention also provides a method for the treatment of metabolic syndrome (syndrome X), impaired glucose tolerance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low HDL levels or hypertension comprising a step of administering to a patient in need thereof an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
The invention also provides a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, for use in the treatment of a condition as defined above. The invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for the treatment of a condition as defined above.
In the methods of the invention the term "treatment" includes both therapeutic and prophylactic treatment. The compounds of formula (I), including the compounds of provisos a) and b), or pharmaceutically acceptable salts thereof, may be administered alone or in combination with one or more other therapeutically active compounds. The other therapeutically active compounds may be for the treatment of the same disease or condition as the compounds of formula (I) or a different disease or condition. The therapeutically active compounds may be administered simultaneously, sequentially or separately.
The compounds of formula (I) may be administered with other active compounds for the treatment of obesity and/or diabetes, for example insulin and insulin analogs, gastric lipase inhibitors, pancreatic lipase inhibitors, sulfonyl ureas and analogs, biguanides, α2 agonists, glitazones, PPAR-γ agonists, mixed PPAR-α/γ agonists, RXR agonists, fatty acid oxidation
inhibitors, α-glucosidase inhibitors, β-agonists, phosphodiesterase inhibitors, lipid lowering agents, glycogen phosphorylase inhibitors, antiobesity agents e.g. pancreatic lipase inhibitors, MCH-I antagonists and CB-I antagonists (or inverse agonists), amylin antagonists, lipoxygenase inhibitors, somostatin analogs, glucokinase activators, glucagon antagonists, insulin signalling agonists, PTPlB inhibitors, gluconeogenesis inhibitors, antilypolitic agents,
GSK inhibitors, galanin receptor agonists, anorectic agents, CCK receptor agonists, leptin, serotonergic/dopaminergic antiobesity drugs, reuptake inhibitors e.g. sibutramine, CRF antagonists, CRF binding proteins, thyromimetic compounds, aldose reductase inhibitors, glucocorticoid receptor antagonists, NHE-I inhibitors or sorbitol dehydrogenase inhibitors. Combination therapy comprising the administration of a compound of formula (I), or a pharmaceutically acceptable salt thereof, and at least one other antiobesity agent represents a further aspect of the invention.
The present invention also provides a method for the treatment of obesity in a mammal, such as a human, which method comprises administering an effective amount of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent, to a mammal in need thereof.
The invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent for the treatment of obesity. The invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in combination with another antiobesity agent, for the treatment of obesity.
The compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and the other antiobesity agent(s) may be coadministered or administered sequentially or separately.
Co-administration includes administration of a formulation which includes both the compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and the other antiobesity agent(s), or the simultaneous or separate administration of different formulations of each agent. Where the pharmacological profiles of the compound of formula (I), or a pharmaceutically acceptable salt thereof, and the other antiobesity agent(s) allow it, coadministration of the two agents may be preferred.
The invention also provides the use of a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent in the manufacture of a medicament for the treatment of obesity.
The invention also provides a pharmaceutical composition comprising a compound of formula (I), including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof, and another antiobesity agent, and a pharmaceutically acceptable carrier. The invention also encompasses the use of such compositions in the methods described above. GPRl 16 agonists are of particular use in combination with centrally acting antiobesity agents.
The other antiobesity agent for use in the combination therapies according to this aspect of the invention is preferably a CB-I modulator, e.g. a CB-I antagonist or inverse agonist. Examples of CB-I modulators include SR141716 (rimonabant) and SLV-319 ((45)-(-)-3-(4-
chlorophenyl)-N-methyl-N-[(4-chlorophenyl)sulfonyl]-4-phenyl-4,5-dihydro-lH-pyrazole-l- carboxamide); as well as those compounds disclosed in EP576357, EP656354, WO 03/018060, WO 03/020217, WO 03/020314, WO 03/026647, WO 03/026648, WO 03/027076, WO 03/040105, WO 03/051850, WO 03/051851, WO 03/053431, WO 03/063781, WO 03/075660, WO 03/077847, WO 03/078413, WO 03/082190, WO 03/082191, WO 03/082833, WO
03/084930, WO 03/084943, WO 03/086288, WO 03/087037, WO 03/088968, WO 04/012671, WO 04/013120, WO 04/026301, WO 04/029204, WO 04/034968, WO 04/035566, WO 04/037823 WO 04/052864, WO 04/058145, WO 04/058255, WO 04/060870, WO 04/060888, WO 04/069837, WO 04/069837, WO 04/072076, WO 04/072077, WO 04/078261 and WO 04/108728, and the references disclosed therein.
Other diseases or conditions in which GPRl 16 has been suggested to play a role include those described in WO 00/50562 and US 6,468,756, for example cardiovascular disorders, hypertension, respiratory disorders, gestational abnormalities, gastrointestinal disorders, immune disorders, musculoskeletal disorders, depression, phobias, anxiety, mood disorders and Alzheimer's disease.
All publications, including, but not limited to, patents and patent application cited in this specification, are herein incorporated by reference as if each individual publication were specifically and individually indicated to be incorporated by reference herein as fully set forth. The invention will now be described by reference to the following examples which are for illustrative purposes and are not to be construed as a limitation of the scope of the present invention.
EXAMPLES Materials and Methods Column chromatography was carried out on Siθ2 (40-63 mesh) unless specified otherwise. LCMS data were obtained as follows: Atlantis 2>μ Ci8 column (3.0 x 20.0mm, flow rate = 0.85mL/min) eluting with a H2O-CH3CΝ solution containing 0.1% HCO2H over 6min with UV detection at 220nm. Gradient information: 0.0-0.3min 100% H2O; 0.3^.25 min: Ramp up to 10% H2O-90% CH3CN; 4.25^.4min: Ramp up to 100% CH3CN; 4.4-^.9min: Hold at 100% CH3CN; 4.9-6.0min: Return to 100% H2O. The mass spectra were obtained using an electrospray ionisation source in either the positive (ES4) or negative (ES") ion modes. 1H NMR spectra were recorded on a Varian Mercury 400 spectrometer at 400 MHz. Abbreviations and acronyms: Ac: Acetyl; DBU: l,8-Diazabicyclo[5.4.0]undec-7-ene; DCE: 1,2-Dichloroethane; DIPEA: N^/V-Diisopropylethylamine; DMF: N,N- Dimethylformamide; Et: Ethyl; Me: Methyl; RT: Retention time; rt: Room temperature; THF:
Tetrahydrofuran.
The syntheses of the following compounds have been reported previously: 4- methylaminomethyl-piperidine-1-carboxylic acid tert-butyl ester: Hiscock, S. D., et al. WO 03/049737; 2-pyridin-4-yl-pyrimidin-4-ol: Medwid, J. B., et al. J. Med. Chem. 1990, 33, 1230- 1241.
Preparation 1: 4-Bromo-2-pyridin-4-yl-pyrimidine
2-Pyridin-4-yl-pyrimidin-4-ol (200mg, l.lόmmol) was suspended in DCE (1OmL) then POBr3 (497mg, 1.73mmol) was added in one portion. The reaction mixture was heated to 95°C (bath) for 18h then cooled to 200C. H2O (3OmL) and CH2Cl2 (3OmL) were added, then the biphasic mixture was stirred vigorously for 30min. The layers were separated and the aqueous phase was extracted with CH2Cl2 (3x30mL). The combined organics were evaporated to dryness to afford the title compound: mlz (ES+) = 236, 238 (1:1) [M+ H]+.
Preparation 2: 2-Pyridin-4-yl-pyrimidine-4-carbaldehyde
Isonicotinamidine hydrochloride (5.0Og, 31.7mmol) and acetaldehyde dimethylacetal (8.44mL, 63.5mmol) were combined and heated to 1100C in anhydrous DMF (35mL) in the presence of DBU (14.2OmL, 95.2mmol) for 3h. The reaction mixture was cooled to 200C, then stirred for 16h, before being concentrated in vacuo. The residue was partitioned between H2O
(10OmL) and EtOAc (10OmL). The aqueous layer was extracted with EtOAc (2x50mL), then the combined organics were washed with brine (5OmL), dried (MgSO4), filtered and concentrated under reduced pressure. Flash column chromatography (EtOAc) of the residue gave 4-methyl-2-pyridin-4-yl-pyrimidine: δH ((CDj)2SO): 2.57 (3H, s), 7.45 (IH, d), 8.21-8.26 (2H, m), 8.72-8.77 (2H, m), 8.82 (IH, d). To a solution of this compound (1.06g, 6.17mmol) in anhydrous dioxane (2OmL) was added SeO2 (2.05g, 18.51mol), then the mixture was heated to reflux for 9Oh. The reaction mixture was cooled to 200C then filtered, washing with EtOAc. The filtrate was evaporated to dryness, then the residue was suspended in CH2Cl2. The suspension was filtered, washing with CH2Cl2, then the filtrate was evaporated to dryness to furnish the title compound: δH (CDCl3): 7.80 (IH, d), 8.38 (2H, d), 8.83 (2H, d), 9.13 (IH, d),
10.15 (IH, s).
Preparation 3: (6-Bromopyridin-2-ylmethyl)methylamine
To a solution of 6-bromopyridine-2-carbaldehyde (1.0Og, 5.38mmol) in CH2Cl2 (2OmL) was added methylamine (4.04mL, 2M/THF, 8.08mmol) then to the stirred solution was added sodium triacetoxyborohydride (1.37g, 6.46mmol). After stirring at rt for 18h, the mixture was partitioned between saturated aqueous NaHCO3 (5OmL) and CH2Cl2 (10OmL). The layers were separated then the aqueous extracted with CH2Cl2 (2x30mL). The combined organics were washed with brine (5OmL), dried (MgSO4), filtered and concentrated in vacuo. Purification via flash column chromatography (5%MeOH / CH2Cl2) afforded the desired compound: δH (CDCl3): 2.49 (3H, s), 3.86 (2H, s), 7.31 (IH, d), 7.38 (IH, d), 7.53 (IH, t).
Preparation 4 : [(6-Bromopyridin-2-ylmethyl)methylamino] methyljpiperidine-l-carboxylic acid tert-butyl ester
To a solution of (6-bromo- -2-ylmethyl)methylamine (Preparation 3, lOOmg, 0.50mmol) in CH2Cl2 (5mL) was added 4-formylpiperidine-l-carboxylic acid tert-butyl ester
(117mg, 0.55mmol) then sodium triacetoxyborohydride (116mg, 0.55mmol). The reaction mixture was stirred for 16h at rt then partitioned between saturated aqueous NaHCO3 (3OmL) and CH2Cl2 (3OmL). The layers were separated and the aqueous extracted with CH2Cl2 (2x20mL). The combined organics were washed with brine (3OmL), dried (MgSO4), filtered and concentrated in vacuo. Purification via flash column chromatography (CH2Cl2 to
2%MeOH/CH2Cl2) furnished the desired compound: δH (CDCl3): 0.95-1.08 (2H, m), 1.44 (9H, s), 1.54-1.69 (IH, m), 1.75 (2H, d), 2.21-2.26 (5H, m), 2.67 (2H, t), 3.61 (2H, s), 3.98-4.15 (2H, m), 7.33 (IH, d), 7.44 (IH, d), 7.51 (IH, t).
Example 1: 4-{[Methyl-(2-pyridin-4-ylpyrimidin-4-yl)-amino]methyl}piperidine-l- carboxylic acid tert-butyl ester
To a solution of 4-methylaminomethylpiperidine-l-carboxylic acid tert-butyl ester (41mg, 0.18mmol) in anhydrous DMF (3mL) was added 4-bromo-2-pyridin-4-yl-pyrimidine
(Preparation 1, 42mg, 0.18mmol) and DIPEA (63μL, 0.36mmol), then the resulting solution was heated to 86°C (bath) for 6h. The reaction mixture was cooled to 200C, then H2O (2OmL) and EtOAc (1OmL) were added. The layers were separated then the aqueous phase was extracted with EtOAc (2x30mL). The combined organics were washed with brine (3OmL), dried (MgSO4), filtered and concentrated in vacuo. Flash column chromatography (EtOAc) gave the title compound: RT = 2.87min; mlz (ES+) = 384 [M+ H]+.
Example 2: 4-{[Methyl-(2-pyridin-4-ylpyrimidin-4-ylmethyl)amino]methyl}piperidine-l- carboxylic acid tert-butyl ester
To a solution of 4-methylaminomethylpiperidine-l-carboxylic acid tert-butyl ester (37mg, O.lόmmol) in anhydrous CH2Cl2 (3mL) was added 2-pyridin-4-yl-pyrimidine-4- carbaldehyde (Preparation 2, 30mg, O.lόmmol) followed by NaBH(OAc)3 (38mg, 0.18mmol). The mixture was stirred vigorously at rt for 24h, before being partitioned between CH2Cl2 (3OmL) and H2O (2OmL). The aqueous phase was extracted with CH2Cl2 (2OmL), then the
combined organics were washed with brine (2OmL), dried (MgSO4), filtered and concentrated in vacuo. Flash column chromatography (EtOAc) gave the title compound. RT = 2.36min; mlz (ES+) = 398 [M+ H]+.
Example 3: 4-[([2,4t]Bipyridinyl-6-ylmethylmethylamino)methyl]piperidine-l-carboxylic acid tert-butyl ester
To a solution of 4-{[(6-bromopyridin-2-yhnethyl)methylamino]methyl}piperidine-l- carboxylic acid tert-butyl ester (Preparation 4, 88mg, 0.28mmol) in toluene (5mL, anhydrous) was added palladium te/rafas(triphenylphosphine) ( 13mg, 0.01 mmol) and sodium carbonate
(53mg in 1.5mL water, deoxygenated). To the vigorously stirred biphasic mixture was added 4- (4,4,5,5-tetramethyl-[l,3,2]dioxaborolan-2-yl)pyridine 57mg, 0.28mmol) and the reaction mixture heated to 86°C (bath) for 3 days. The reaction mixture was allowed to cool to rt then aqueous ammonia (2M, 15mL) was added with vigorous stirring. After lOmin, ethyl acetate (3OmL) was added and the layers separated. The aqueous was extracted with ethyl acetate
(2x20mL) and the combined organics washed with brine (2OmL), dried (MgSO4), filtered and concentrated in vacuo. Purification via flash chromatography (5%MeOH/CH2Cl2) afforded the title compound: δH (CDCl3): 0.96-1.12 (2H, m), 1.43 (9H, s), 1.63-1.73 (IH, m), 1.78 (2H, d), 2.26 - 2.32 (5H, m), 2.69 (2H, t), 3.72 (2H, s), 4.00 - 4.14 (2H, m), 7.51 (IH, d), 7.65 (IH, d), 7.77 (IH, t), 7.88 (2H, d), 8.69 (2H, d). RT = 2.38min; mlz (ES+) = 397 [M+ H]+.
The biological activity of the compounds of the invention may be tested in the following assay systems:
Yeast Reporter Assay
The yeast cell-based reporter assays have previously been described in the literature (e.g. see Miret J. J. et al, 2002, J. Biol. Chem., 277:6881-6887; Campbell R.M. et al, 1999, Bioorg. Med. Chem. Lett., 9:2413-2418; King K. et al, 1990, Science, 250:121-123); WO 99/14344; WO 00/12704; and US 6,100,042). Briefly, yeast cells have been engineered such that the endogenous yeast G-alpha (GPAl) has been deleted and replaced with G-protein chimeras constructed using multiple techniques. Additionally, the endogenous yeast alpha-cell GPCR, Ste3 has been deleted to allow for a homologous expression of a mammalian GPCR of choice. In the yeast, elements of the pheromone signaling transduction pathway, which are conserved in eukaryotic cells (for example, the mitogen-activated protein kinase pathway), drive the expression of Fusl . By placing β-galactosidase (LacZ) under the control of the Fusl promoter (Fuslp), a system has been developed whereby receptor activation leads to an enzymatic read-out.
Yeast cells were transformed by an adaptation of the lithium acetate method described by Agatep et al, (Agatep, R. et al, 1998, Transformation of Saccharomyces cerevisiae by the lithium acetate/single-stranded carrier DNA/polyethylene glycol (LiAc/ss-DNA/PEG) protocol.
Technical Tips Online, Trends Journals, Elsevier). Briefly, yeast cells were grown overnight on
yeast tryptone plates (YT). Carrier single-stranded DNA (lOμg), 2μg of each of two Fuslp- LacZ reporter plasmids (one with URA selection marker and one with TRP), 2μg of GPRl 16 (human or mouse receptor) in yeast expression vector (2μg origin of replication) and a lithium acetate/ polyethylene glycol/ TE buffer was pipetted into an Eppendorf tube. The yeast expression plasmid containing the receptor/ no receptor control has a LEU marker. Yeast cells were inoculated into this mixture and the reaction proceeds at 300C for 60min. The yeast cells were then heat-shocked at 420C for 15min. The cells were then washed and spread on selection plates. The selection plates are synthetic defined yeast media minus LEU, URA and TRP (SD- LUT). After incubating at 300C for 2-3 days, colonies that grow on the selection plates were then tested in the LacZ assay.
In order to perform fiuorimetric enzyme assays for β-galactosidase, yeast cells carrying the human or mouse GPRl 16 receptor were grown overnight in liquid SD-LUT medium to an unsaturated concentration (i.e. the cells were still dividing and had not yet reached stationary phase). They were diluted in fresh medium to an optimal assay concentration and 90μl of yeast cells are added to 96-well black polystyrene plates (Costar). Compounds, dissolved in DMSO and diluted in a 10% DMSO solution to 1OX concentration, were added to the plates and the plates placed at 300C for 4h. After 4h, the substrate for the β-galactosidase was added to each well. In these experiments, Fluorescein di (β-D-galactopyranoside) was used (FDG), a substrate for the enzyme that releases fluorescein, allowing a fiuorimetric read-out. 20μl per well of 500μM FDG/2.5% Triton XlOO was added (the detergent was necessary to render the cells permeable). After incubation of the cells with the substrate for 60min, 20μl per well of IM sodium carbonate was added to terminate the reaction and enhance the fluorescent signal. The plates were then read in a fiuorimeter at 485/535nm.
Compounds of the invention gave an increase in fluorescent signal of at least ~ 1.5-fold that of the background signal (i.e. the signal obtained in the presence of 1% DMSO without compound).
cAMP Assay
A stable cell line expressing recombinant human GPRl 16 was established and this cell line was used to investigate the effect of compounds of the invention on intracellular levels of cyclic AMP (cAMP). The cells monolayers were washed with phosphate buffered saline and stimulated at 370C for 30min with various concentrations of compound in stimulation buffer plus 1% DMSO. Cells were then lysed and cAMP content determined using the Perkin Elmer AlphaScreen™ (Amplified Luminescent Proximity Homogeneous Assay) cAMP kit. Buffers and assay conditions were as described in the manufacturer's protocol.
Compounds of the invention showed a concentration-dependant increase in intracellular cAMP level.
In vivo feeding study The effect of compounds of the invention on body weight and food and water intake may be examined in freely-feeding male Sprague-Dawley rats maintained on reverse-phase lighting. Test compounds and reference compounds are dosed by appropriate routes of administration (e.g. intraperitoneally or orally) and measurements made over the following 24 h. Rats are individually housed in polypropylene cages with metal grid floors at a temperature of 21±4°C and 55±20%
humidity. Polypropylene trays with cage pads are placed beneath each cage to detect any food spillage. Animals are maintained on a reverse phase light-dark cycle (lights off for 8 h from 09.30-17.30 h) during which time the room was illuminated by red light. Animals have free access to a standard powdered rat diet and tap water during a two week acclimatization period. The diet is contained in glass feeding jars with aluminum lids. Each Kd has a 3-4 cm hole in it to allow access to the food. Animals, feeding jars and water bottles are weighed (to the nearest 0.1 g) at the onset of the dark period. The feeding jars and water bottles are subsequently measured 1, 2, 4, 6 and 24 h after animals are dosed with a compound of the invention and any significant differences between the treatment groups at baseline compared to vehicle-treated controls.
Anti-diabetic effects of compounds of the invention in an in-vitro model of pancreatic beta cells (HIT-T15)
Cell Culture HIT-T15 cells (passage 60) may be obtained from ATCC, and cultured in RPMI1640 medium supplemented with 10% fetal calf serum and 3OnM sodium selenite. All experiments should be performed with cells at less than passage 70, in accordance with the literature, which describes altered properties of this cell line at passage numbers above 81 (Zhang HJ, Walseth TF, Robertson RP. Insulin secretion and cAMP metabolism in HIT cells. Reciprocal and serial passage-dependent relationships. Diabetes. 1989 Jan;38(l):44-8).
cAMP assay
HIT-T15 cells are plated in standard culture medium in 96-well plates at 100,000 cells/ 0.1ml/ well and cultured for 24 hr and the medium then discarded. Cells are incubated for 15min at room temperature with lOOμl stimulation buffer (Hanks buffered salt solution, 5mM HEPES,
0.5mM IBMX, 0.1% BSA, pH 7.4). This is discarded and replaced with compound dilutions over the range 0.001, 0.003, 0.01, 0.03, 0.1, 0.3, 1, 3, 10, 30 μM in stimulation buffer in the presence of 0.5% DMSO. Cells are incubated at room temperature for 30min. Then 75ul lysis buffer (5mM HEPES, 0.3% Tween-20, 0.1% BSA, pH 7.4) added per well and the plate shaken at 900 rpm for 20 min. Particulate matter is removed by centrifugation at 3000rpm for 5min, then the samples are transferred in duplicate to 384-well plates, and processed following the Perkin Elmer AlphaScreen cAMP assay kit instructions. Briefly 25μl reactions are set up containing 8μl sample, 5μl acceptor bead mix and 12μl detection mix, such that the concentration of the final reaction components is the same as stated in the kit instructions. Reactions are incubated at room temperature for 150min, and the plate read using a Packard
Fusion instrument. Measurements for cAMP are compared to a standard curve of known cAMP amounts (0.01, 0.03, 0.1, 0.3, 1, 3, 10, 30, 100, 300, 1000 nM) to convert the readings to absolute cAMP amounts. Data was analysed using XLfit 3 software.
Insulin secretion assay
HIT-T 15 cells are plated in standard culture medium in 12-well plates at 106 cells/ 1 ml/ well and cultured for 3 days and the medium then discarded. Cells are washed x 2 with supplemented Krebs-Ringer buffer (KRB) containing 119 mM NaCl, 4.74 mM KCl, 2.54 mM CaCl2, 1.19 mM MgSO4, 1.19 mM KH2PO4, 25 mM NaHCO3, 1OmM HEPES at pH 7.4 and
0.1% bovine serum albumin. Cells are incubated with ImI KRB at 370C for 30 min which is then discarded. This is followed by a second incubation with KRB for 30 min, which is collected and used to measure basal insulin secretion levels for each well. Compound dilutions (0, 0.1, 0.3, 1, 3, 10 uM) are then added to duplicate wells in ImI KRB, supplemented with 5.6 mM glucose. After 30 min incubation at 370C samples are removed for determination of insulin levels. Measurement of insulin is done using the Mercodia Rat insulin ELISA kit, following the manufacturers instructions, with a standard curve of known insulin concentrations. For each well insulin levels are subtracted by the basal secretion level from the pre-incubation in the absence of glucose. Data is analysed using XLfit 3 software.
Claims
1. A compound of formula (I), or a pharmaceutically acceptable salt thereof:
R'-A-V-B-R2
(I) wherein V is phenyl or a 6-membered heteroaryl ring containing up to three N atoms;
A is -CH=CH- or (CH2)n; B is -CH=CH- or (CH2),,, where one of the CH2 groups may be replaced by O, NR5,
S(O)n,, C(O) or C(O)NR12; n is independently 0, 1, 2 or 3; m is independently 0, 1 or 2;
R1 is 3- or 4-pyridyl, 4- or 5-pyrimidinyl or 2-pyrazinyl, any of which may be optionally substituted by one or more substituents selected from halo, CM alkyl, CM fiuoroalkyl, C2A alkenyl, C2-4 alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6)2, N(R6)2, NR10COR6, NR10SO2R6, SO2N(R6)2, a 4- to 7-membered heterocyclyl group or a 5- or 6- membered heteroaryl group;
R2 is 4- to 7-membered cycloalkyl substituted by R3, C(O)OR3, C(O)R3 or S(O)2R3, or 4- to 7-membered heterocyclyl, containing one or two nitrogen atoms which is unsubstituted or substituted by C(O)OR4, C(O)R3, S(O)2R3, C(O)NHR4, P(O)(OR11^ or a 5- or 6-membered nitrogen containing heteroaryl group;
R3 is C3-8 alkyl, C3-8 alkenyl or C3-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, CM alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or CM alkylheteroaryl, any of which may be optionally substituted with one or more substituents selected from halo, CM alkyl, CM fiuoroalkyl, OR6, CN, CO2C1-4 alkyl, N(R6)2 and NO2;
R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or
C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, CM alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or CM alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, CM alkyl, CM fiuoroalkyl, OR6, CN, CO2CM alkyl, N(R^2 and NO2; R5 is hydrogen, C(O)R7, S(O)2R8, C3-7 cycloalkyl or CM alkyl optionally substituted by
OR6, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, Ci-2 alkyl, Ci-2 fiuoroalkyl, OR6, CN, N(R6)2 and NO2;
R6 are independently hydrogen, CM alkyl, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fiuoroalkyl, OR9, CN, SO2CH3, N(R10)2 and NO2; or a group N(R10)2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR10;
R7 is hydrogen, CM alkyl, OR6, N(R6)2, aryl or heteroaryl; R8 is Ci_4 alkyl, C^ fluoroalkyl, aryl or heteroaryl; R9 is hydrogen, Ci-2 alkyl or Ci-2 fluoroalkyl; R10 is hydrogen or C^ alkyl; R11 is phenyl; and R12 is hydrogen, C^ alkyl or C3-7 cycloalkyl; provided that the compound is not: a) tert-butyl 4-(3-pyridin-4-ylbenzyl)piperidine-l-carboxylate; or b) 4-(3-pyridin-4-ylbenzyl)piperidine.
2. A compound according to claim 1 , or a pharmaceutically acceptable salt thereof, wherein V represents a 6-membered heteroaryl ring of the formula:
3. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein the n groups of A and B do not both represent 0.
4. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein in A, n is 0, 1 or 2.
5. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein in B, n is 2 or 3.
6. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein R1 is 4-pyridyl optionally substituted by 1 or 2 halo, C^ alkyl,
CM fluoroalkyl, Q-^ alkenyl, C2^, alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6);., N(R6)2, NR10COR6, NR10SO2R6, SO2N(R6)2, 4- to 7-membered heterocyclyl or 5- or 6-membered heteroaryl groups.
7. A compound according to claim 6, or a pharmaceutically acceptable salt thereof, wherein R1 is 4-pyridyl optionally substituted by halo, Cμ alkyl, Cw alkoxy or CN.
8. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein R2 is a 4- to 7-membered cycloalkyl substituted by R3, or a 4- to 7-membered heterocyclyl containing one nitrogen atom which is substituted by C(O)OR4.
9. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein R3 is C3-8 alkyl which may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl.
10. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, 5- to 6-membered heteroaryl containing one or two nitrogen atoms, CM alkylC3-7 cycloalkyl or CM alkylaryl, any of which may be substituted with one or more substituents selected from halo, C1-4 alkyl, C1-4 fluoroalkyl, OR6 and CO2CM alkyl.
11. A compound according to claim 10, or a pharmaceutically acceptable salt thereof, wherein R4 is C3-6 alkyl optionally substituted with up to 5 fluoro or chloro atoms, and which may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl.
12. A compound according to any one of the preceding claims, or a pharmaceutically acceptable salt thereof, wherein R5 is CM alkyl.
13. A compound of formula (I) as defined in any one of Examples 1 to 3, or a pharmaceutically acceptable salt thereof.
14. A compound according to claim 1 having the formula (Ib), or a pharmaceutically acceptable salt thereof:
B is -CH=CH- or (CH2)n, where one of the CH2 groups may be replaced by O, NR5, S(O)m or C(O); n is independently 0, 1, 2 or 3, provided that not both n are 0; m is independently 0, 1 or 2;
Rx and Ry are independently selected from hydrogen, halo, CM alkyl, CM fluoroalkyl, QM alkenyl, QM alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6)2, N(R6)2, NR10COR6, NR10SO2R6, SO2N(R6)2, a 4- to 7-membered heterocyclyl group and a 5- or 6- membered heteroaryl group;
Z is C(O)OR4, C(O)R3, S(O)2R3, C(O)NHR4 or a 5- or 6-membered nitrogen containing heteroaryl group;
R3 is C3-8 alkyl, C3-8 alkenyl or C3-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, CM alkylC3-7 cycloalkyl, Cw alkylaryl, Cw alkylheterocyclyl or Cw alkylheteroaryl, any of which may be optionally substituted with one or more substituents selected from halo, Ci-4 alkyl, Ci-4 fluoroalkyl, OR6, CN, CO2CM alkyl, N(R6)2 and NO2;
R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and may contain a CH2 group that may be replaced by O, or
C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, CM alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or C^ alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, Q-4 alkyl, Ci-4 fluoroalkyl, OR6, CN, CO2Ci-4 alkyl, N(R6)2 and NO2;
R6 are independently hydrogen, or C1-4 alkyl, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR9, CN, SO2CH3, N(R10)2 and NO2; or a group N(R10)2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR10;
R9 is hydrogen, Ci-2 alkyl or Ci-2 fluoroalkyl; and R10 is hydrogen or Ci-4 alkyl.
15. A compound according to claim 1 having the formula (Id), or a pharmaceutically acceptable salt thereof:
R is hydrogen, halo, Ci-4 alkyl, Ci-4 fluoroalkyl, C2-A alkenyl, C2-A alkynyl, C3-7 cycloalkyl, aryl, OR6, CN, NO2, S(O)1nR6, CON(R6);., N(R6J2, NR10COR6, NR10SO2R6, SO2N(R6)2, a 4- to 7-membered heterocyclyl group or a 5- or 6-membered heteroaryl group;
R4 is C2-8 alkyl, C2-8 alkenyl or C2-8 alkynyl, any of which may be optionally substituted with up to 5 fluoro or chloro atoms, and contain a CH2 group that may be replaced by O, or C3-7 cycloalkyl, aryl, heterocyclyl, heteroaryl, Ci-4 alkylC3-7 cycloalkyl, CM alkylaryl, CM alkylheterocyclyl or Cw alkylheteroaryl, any of which may be substituted with one or more substituents selected from halo, Ci-4 alkyl, Ci-4 fluoroalkyl, OR6, CN, CO2Ci-4 alkyl, N(R^2 and
NO2;
R5 is Ci-4 alkyl;
R6 are independently hydrogen, or Ci-4 alkyl, C3-7 cycloalkyl, aryl, heterocyclyl or heteroaryl, wherein the cyclic groups may be substituted with one or more substituents selected from halo, CM alkyl, CM fluoroalkyl, OR9, CN, SO2CH3, N(R10)2 and NO2; or a group N(R10)2 may form a 4- to 7-membered heterocyclic ring optionally containing a further heteroatom selected from O and NR10;
R9 is hydrogen, Ci-2 alkyl or Ci-2 fluoroalkyl; R10 is hydrogen or Ci-4 alkyl; and p is 0 or 1.
16. A pharmaceutical composition comprising a compound according to any one of claims 1 to 15, including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier.
17. A method for the treatment of a disease or condition in which GPRl 16 plays a role comprising a step of administering to a subject in need thereof an effective amount of a compound according to any one of claims 1 to 15, including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
18. A method for the regulation of satiety comprising a step of administering to a subject in need thereof an effective amount of a compound according to any one of claims 1 to 15, including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
19. A method for the treatment of obesity comprising a step of administering to a subject in need thereof an effective amount of a compound according to any one of claims 1 to 15, including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
20. A method for the treatment of diabetes comprising a step of administering to a subject in need thereof an effective amount of a compound according to any one of claims 1 to 15 , including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
21. A method for the treatment of metabolic syndrome (syndrome X), impaired glucose tolerance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low HDL levels or hypertension comprising a step of administering to a patient in need thereof an effective amount of a compound according to any one of claims 1 to 15, including the compounds of provisos a) and b), or a pharmaceutically acceptable salt thereof.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200531147T SI1838698T1 (en) | 2004-12-31 | 2005-12-30 | Pyrimidine derivatives as gpcr agonists |
DE602005023343T DE602005023343D1 (en) | 2004-12-31 | 2005-12-30 | Pyrimidine derivatives as GPCR-agonists |
EP05821785A EP1838698B1 (en) | 2004-12-31 | 2005-12-30 | Pyrimidine derivatives as gpcr agonists |
JP2007548904A JP4916452B2 (en) | 2004-12-31 | 2005-12-30 | Derivatives of pyridine, pyrimidine, and pyrazine as GPCR agonists |
US11/794,641 US8173807B2 (en) | 2004-12-31 | 2005-12-30 | Pyridine, pyrimidine and pyrazine derivatives as GPCR agonists |
AT05821785T ATE479677T1 (en) | 2004-12-31 | 2005-12-30 | PYRIMIDINE DERIVATIVES AS GPCR AGONISTS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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GB0428514.4 | 2004-12-31 | ||
GBGB0428514.4A GB0428514D0 (en) | 2004-12-31 | 2004-12-31 | Compounds |
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WO2006070208A1 true WO2006070208A1 (en) | 2006-07-06 |
WO2006070208A8 WO2006070208A8 (en) | 2006-08-10 |
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PCT/GB2005/050266 WO2006070208A1 (en) | 2004-12-31 | 2005-12-30 | Pyridine, pyrimidine and pyrazine derivatives as gpcr agonists |
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US (1) | US8173807B2 (en) |
EP (1) | EP1838698B1 (en) |
JP (1) | JP4916452B2 (en) |
AT (1) | ATE479677T1 (en) |
DE (1) | DE602005023343D1 (en) |
ES (1) | ES2350729T3 (en) |
GB (1) | GB0428514D0 (en) |
SI (1) | SI1838698T1 (en) |
WO (1) | WO2006070208A1 (en) |
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-
2004
- 2004-12-31 GB GBGB0428514.4A patent/GB0428514D0/en not_active Ceased
-
2005
- 2005-12-30 US US11/794,641 patent/US8173807B2/en not_active Expired - Fee Related
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- 2005-12-30 JP JP2007548904A patent/JP4916452B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
WO2006070208A8 (en) | 2006-08-10 |
US8173807B2 (en) | 2012-05-08 |
EP1838698B1 (en) | 2010-09-01 |
DE602005023343D1 (en) | 2010-10-14 |
GB0428514D0 (en) | 2005-02-09 |
ATE479677T1 (en) | 2010-09-15 |
JP2008526724A (en) | 2008-07-24 |
US20100035897A1 (en) | 2010-02-11 |
EP1838698A1 (en) | 2007-10-03 |
JP4916452B2 (en) | 2012-04-11 |
ES2350729T3 (en) | 2011-01-26 |
SI1838698T1 (en) | 2010-12-31 |
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