Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
  • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
  • C07D487/04—Ortho-condensed systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
  • A61P35/04—Antineoplastic agents specific for metastasis
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Definitions

• the compounds of formula I are potent inhibitors of the tyrosine kinase activity of the Insulin-like growth factor I receptor (IGF-IR) and inhibit IGF-IR-dependent cell proliferation.
• IGF-IR Insulin-like growth factor I receptor
• the pesence of the substituents, preferably benzyloxy substituents, at position 3 of the phenyl group of the 4-amino-5-phenyl- 7-cyclobutyl-pyrrolo[2,3-d]pyrimidine scaffold together with the presence of the substitutent R 2 as defined herein below is crucial for the efficacy and/or the specificity of the compounds of the present invention as IGF-IR tyrosine kinase inhibitors and their potential and/or selectivity to inhibit IGF-IR-dependent cell proliferation.
• the compounds of formula I permit, for example, an unexpected new therapeutic approach, especially for diseases in the treatment of which, and also for the prevention of which, an inhibition of the IGF-IR tyrosine kinase and/or of the IGF-IR-dependent cell proliferation shows beneficial effects.
• diseases include proliferative diseases, such as tumours, like for example breast, renal, prostate, colorectal, thyroid, ovarian, pancreas, neuronal, lung, uterine and gastro-intestinal tumours as well as osteosarcomas and melanomas.
• n is from 0 to 4,
• Ri is hydrogen, unsubstituted or substituted lower alkyl or halogen
• R 2 is lower alkyl substituted by hydroxy, unsubstituted, mono- or disubstituted amino or by a heterocyclic radical
• Y is oxygen, sulfur or imino
• Z is either not present, lower alkyl or amino-lower alkyl
• R 6 a radical R 6 -sulfonylamino-lower alkyl, wherein R 6 is unsubstituted or substituted lower alkyl, unsubstituted, mono- or disubstituted amino or phenyl optionally substituted by lower alkyl, lower alkoxy or nitro, with the proviso that R
• R* is a radical R 7 -CR 8 (R 9 )-, wherein R 7 is cyclobutyl, cyclopentyl, cyclohexyl, phenyl, furyl, pyrrolyl, thienyl or pyridyl, said R 7 substitutents being optionally substituted by one or more radicals selected from lower alkyl and halogen, and Re and R 9 are independently of each other hydrogen, lower alkyl or halogen, and X is selected from -O-, -NH- and -S-, or a salt thereof.
• the compounds may thus be present as mixtures of isomers or as pure isomers, preferably as enantiomer- pure diastereomers.
• the prefix "lower” denotes a radical having up to and including a maximum of 7, especially up to and including a maximum of 4 carbon atoms, the radicals in question being either un- branched or branched with single or multiple branching.
• Lower alkyl is, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert- butyl, n-pentyl, isopentyl, neopentyl, n-hexyl or n-heptyl.
• Lower alkylene is, for example, methylene (-CH 2 -), ethylene (-CH 2 -CH 2 -), propylene (-CH 2 - CH 2 -CH 2 -) or tetramethylene (-CH 2 -CH 2 -CH 2 -CH 2 -).
• C C ⁇ alkyl or CrC 5 alkyl are either unbranched or branched (with single or multiple branching) alkyl radicals having from 1 to 6 or from 1 to 5 carbon atoms, respectively, and include methyl, ethyl, n-propyl, 2-propyl, n-butyl, sec-butyl, t-butyl, and the like.
• R 2 being lower alkyl substituted by unsubstituted, mono- or disubstituted amino or by a heterocyclic radical
• lower alkyl is preferably methyl.
• Lower alkyl R 5 is preferably methyl, isopropyl or tert-butyl.
• Amino-lower alkyl Z is preferably aminomethyl.
• lower alkyl is preferably methyl.
• Lower alkyl R 6 is preferably methyl, ethyl or isopropyl.
• Substituted lower alkyl is lower alkyl as defined above where one or more, preferably one, substituents may be present, such as amino, N-lower alkylamino, N,N-di-lower alkylamino, N-lower alkanoylamino, N,N-di-lower alkanoylamino, hydroxy, lower alkoxy, lower alkoxy- lower alkoxy, lower alkanoyl, lower alkanoyloxy, cyano, nitro, carboxy, lower alkoxycarbonyl, carbamoyl, amidino, guanidino, ureido, mercapto, lower alkylthio, halogen or a heterocyclic radical.
• substituents such as amino, N-lower alkylamino, N,N-di-lower alkylamino, N-lower alkanoylamino, N,N-di-lower alkanoylamino, hydroxy, lower
• Substituted lower alkyl R 5 is preferably lower alkyl substituted by lower alkoxy, lower alkoxy- lower alkoxy or most preferably by a heterocyclic radical.
• Halogen is primarily fluorine, chlorine, bromine, or iodine, especially fluorine, chlorine, or bromine.
• Mono- or disubstituted amino is amino substituted by one or two radicals selected independently of one another from e.g. unsubstituted or substituted lower alkyl; phenyl or phenyl- lower alkyl wherein the phenyl radical is optionally substituted by e.g.
• R 2 being lower alkyl substituted by mono- or disubstituted amino
• mono- or disubstituted amino preferably represents N-lower alkylamino or N,N-di-lower alkylamino, respectively.
• Mono- or disubstituted amino R 5 is preferably N-lower alkylamino or N,N-di-lower alkylamino, respectively, wherein the lower alkyl moiety is optionally substituted by phenyl, lower alkyl- phenyl, lower alkoxy-phenyl, morpholinyl or N,N-di-lower alkylamino.
• Mono- or disubstituted amino Re is preferably N,N-di-lower alkylamino.
• a heterocyclic radical contains especially up to 20 carbon atoms and is preferably a saturated or unsaturated monocyclic radical having from 4 or 8 ring members and from 1 to 3 heteroatoms which are preferably selected from nitrogen, oxygen and sulfur, or a bi- or tricyclic radical wherein, for example, one or two benzene radicals are annellated (fused) to the mentioned monocyclic radical.
• the heterocyclic radical contains at least one nitrogen ring atom whereby the binding of the heterocyclic radical to the radical of the molecule of formula I occurs via a nitrogen ring atom.
• the heterocyclic radical is optionally substituted by one or more, preferably by one or two, radicals such as e.g. unsubstituted or substituted lower alkyl, amino, N-lower alkylamino, N,N-di-lower alkylamino, N-lower alkanoylamino, N,N-di-lower alkanoylamino, hydroxy, lower alkoxy, lower alkoxy-lower alkoxy, lower alkanoyl, lower alkanoyloxy, cyano, nitro, carboxy, lower alkoxycarbonyl, carbamoyl, amidino, guanidino, ureido, mercapto, lower alkylthio, halogen, phenyl or pyridyl.
• radicals such as e.g. unsubstituted or substituted lower alkyl, amino, N-lower alkylamino, N,N-di-lower alkylamino
• a heterocyclic radical is azetidinyl, pyrrolidinyl, piperidyl, azepanyl, piperaz- inyl, tetrahydropyranyl, morpholinyl or thiomorpholinyl, wherein said radicals are optionally substituted by one or more, preferably one or two, radicals selected independently of one another from the group consisting of lower alkyl, hydroxy-lower alkyl, free or etherified hydroxy, lower alkoxycarbonyl, carbamoyl, phenyl and pyridyl and the binding of the heterocyclic radical to the radical of the molecule of formula I occurs via a nitrogen ring atom.
• the heterocyclic radical preferably represents azetidinyl, pyrrolidinyl, di-lower alkyl-pyrrolidinyl, aminocarbonyl-pyrrolidinyl, piperidyl, hydroxy-piperidyl, aminocarbonyl-piperidyl, azepanyl, lower alkyl-piperazinyl, lower alkoxycarbonyl-piperazinyl, phenyl-piperazinyl, pyridyl-piperazinyl, morpholinyl, di-lower alkyl- morpholinyl or thiomorpholinyl.
• the heterocyclic radical preferably represents piperidyl, lower alkyl-piperazinyl or morpholinyl.
• a heterocyclic radical Rs is preferably pyrrolidinyl, piperidyl, lower alkyl-piperazinyl or morpholinyl.
• Etherified hydroxy is, for example, alkoxy, especially lower alkoxy.
• the lower alkyl moiety of lower alkoxy is optionally substituted by one or more, preferably one, radicals such as e.g. amino, N-lower alkylamino, N,N-di-lower alkylamino, N-lower alkanoylamino, N,N-di-lower al- kanoylamino, hydroxy, lower alkoxy, lower alkoxy-lower alkoxy, lower alkanoyl, lower alkanoyloxy, cyano, nitro, carboxy, lower alkoxycarbonyl, carbamoyl, amidino, guanidino, ureido, mercapto, lower alkylthio, halogen or a heterocyclic radical.
• Etherified hydroxy R 5 is preferably lower alkoxy wherein the lower alkyl moiety is optionally substituted by lower alkoxy, N,N-di-lower alkylamino, lower alkyl-piperazinyl or morpholinyl.
• n is preferably 0.
• R 4 is preferably benzyl.
• Y is preferably oxygen.
• Salts are especially the pharmaceutically acceptable salts of compounds of formula I (or an N-oxide thereof).
• salts may also be formed with bases, e.g. metal or ammonium salts, such as alkali metal or alkaline earth metal salts, or ammonium salts with ammonia or suitable organic amines, such as tertiary monoamines.
• bases e.g. metal or ammonium salts, such as alkali metal or alkaline earth metal salts, or ammonium salts with ammonia or suitable organic amines, such as tertiary monoamines.
• PBS/O Phosphate-Buffered Saline without CaCI 2
• IC 50 values for the compounds of formula I are calculated via linear regression analysis using the GraphPad In- stat program (GraphPad Software, USA). IC 50 values in the range of 5 nM to 1 ⁇ M, especially in the range of 5 nM to 300 nM are found.
• tumour cells human epithelial cell line A-431; American Type Culture Collection (ATCC), Rockville, MD, USA, Catalogue Number ATCC CRL 1555; cell line from an 85-year-old woman; epidermoid carcinoma cell line
• Tumour fragments (about 25 mg) are implanted subcutaneously in the left flank of the animals using a 13-gauge trocar needle under Forene ® anaesthesia (Abbott, Switzerland). Treatment with the test compound is started as soon as the tumour has reached a mean volume of 100 mm 3 . Tumour growth is meas- ured two to three times a week and 24 hours after the last treatment by determining the length of two perpendicular axes. The tumour volumes are calculated in accordance with published methods (see Evans et al., Brit. J. Cancer 45, 466-8, 1982).
• cell line A-431 As an alternative to cell line A-431 , other cell lines may also be used in the same manner, for example:
• the compounds of formula I In addition to the inhibition of the IGF-IR tyrosine kinase, the compounds of formula I also inhibit the tyrosine kinase activity of the receptor tyrosine kinase Flt-3.
• the compounds of formula I are therefore also useful for the treatment of proliferative diseases, especially tumour diseases, responsive to an inhibition of the Flt-3 tyrosine kinase receptor.
• tumour diseases include e.g. leukemias and myelodysplastic syndrome.
• the compounds of formula I are therefore suitable for the treatment of these diseases, especially for the treatment of AML since activating mutations of the Flt-3 receptor have been found in about 35% of patients with AML, and are associated with a poor prognosis.
• the Flt-3 inhibitory activity of a compound of formula I can be shown in a tyrosine kinase inhibition assay using the cytoplasmic kinase domain of Flt-3.
• the assay is performed as follows:
• the baculovirus donor vector pFbacGOI (GIBCO) is used to generate a recombinant baculovirus that expresses the amino acid region amino acids 563-993 of the intra- cytoplasmic kinase domain of human Flt-3.
• the coding sequence for the cytoplasmic domain of Flt-3 is amplified by PCR from human c-DNA libraries (Clontech).
• the amplified DNA fragments and the pFbacGOI vector are made compatible for ligation by digestion with BamHI and Hindlll. Ligation of these DNA fragments results in the baculovirus donor plasmid Flt-3(1.1).
• the production of the viruses, the expression of proteins in Sf9 cells and the purification of the GST-fused proteins are performed as follows:
• Virus containing media is collected from the transfected cell culture and used for infection to increase its titer. Virus containing media obtained after two rounds of infection is used for large-scale protein expression. For large-scale protein expression 100 cm 2 round tissue culture plates are seeded with 5 x 10 7 cells/plate and infected with 1 mL of virus-containing media (approx. 5 MOIs). After 3 days the cells are scraped off the plate and centrifuged at 500 rpm for 5 min.
• the centrifuged cell lysate is loaded onto a 2 mL glu- tathione-sepharose column (Pharmacia) and washed three times with 10 mL of 25 mM Tris- HCI, pH 7.5, 2 mM EDTA, 1 mM DTT, 200 mM NaCI.
• the GST-tagged protein is then eluted by 10 applications (1 mL each) of 25 mM Tris-HCI, pH 7.5, 10 mM reduced-glutathione, 100 mM NaCI, 1 mM DTT, 10 % Glycerol and stored at -70°C.
• the activity is assayed in the presence or absence of inhibitors, by measuring the incorporation of 33 P from [ ⁇ 33 P] ATP into the poly(Glu,Tyr) substrate.
• the assay (30 ⁇ L) is carried out in 96-well plates at ambient temperature for 20 min under conditions described below and terminated by the addition of 20 ⁇ L of 125 mM EDTA. Subsequently, 40 ⁇ L of the reaction mixture is transferred onto Immobilon-PVDF membrane (Millipore, Bedford, MA, USA) previously soaked for 5 min with methanol, rinsed with water, then soaked for 5 min with 0.5 % H 3 PO 4 and mounted on vacuum manifold with disconnected vacuum source.
• IC 50 values are calculated by linear regression analysis of the percentage inhibition of each compound in duplicate, at four concentrations (usually 0.01 , 0.1 , 1 and 10 ⁇ M).
• One unit of protein kinase activity is defined as 1 nmole of 33 P ATP transferred from [ ⁇ 33 P] ATP to the substrate protein per minute per mg of protein at 37 °C.
• the compounds of formula I can further be used in the treatment of obesity and are also suitable for the treatment of ischemic retinopa- thies, such as e.g. diabetic retinopathy and retinopathy of prematurity (ROP).
• ischemic retinopa- thies such as e.g. diabetic retinopathy and retinopathy of prematurity (ROP).
• ROP retinopathy of prematurity
• Compounds of formula I are also useful for preventing or combating graft vessel diseases, e.g. allo- or xenotransplant vasculopathies, e.g. graft vessel atherosclerosis or chronic graft rejection, e.g. in a transplant of organ, tissue or cells, e.g. heart, lung, combined heart-lung, liver, kidney or pancreatic transplants (e.g. pancreatic islet cells), or for preventing or treating vein graft stenosis, restenosis and/or vascular occlusion following vascular injury, e.g. caused by catherization procedures or vascular scraping procedures such as percutaneous transluminal angioplasty, laser treatment or other invasive procedures which disrupt the integrity of the vascular intima or endothelium.
• graft vessel diseases e.g. allo- or xenotransplant vasculopathies, e.g. graft vessel atherosclerosis or chronic graft rejection, e.g. in
• Ri is hydrogen, unsubstituted or substituted lower alkyl or halogen
• R 2 is lower alkyl substituted by hydroxy, unsubstituted, mono- or disubstituted amino or by a heterocyclic radical
• Y is oxygen, sulfur or imino
• Z is either not present, lower alkyl or amino-lower alkyl
• R 6 a radical R 6 -sulfonylamino-lower alkyl, wherein R 6 is unsubstituted or substituted lower alkyl, unsubstituted, mono- or disubstituted amino or phenyl optionally substituted by lower alkyl, lower alkoxy or nitro, with the proviso that R 2
• R 4 is a radical R 7 -CR 8 (R 9 )-, wherein R 7 is cyclobutyl, cyclopentyl, cyclohexyl, phenyl, furyl, pyrrolyl, thienyl, pyridyl or phenyl substituted by one or more substitutents selected from lower alkyl and halogen, and R 8 and R 9 are independently of each other hydrogen, lower alkyl or halogen, and X is selected from -O-, -NH- and -S-, or a salt thereof.
• R 1 is hydrogen, unsubstituted or substituted lower alkyl or halogen
• R 2 is lower alkyl substituted by unsubstituted, mono- or disubstituted amino or by a heterocyclic radical
• Y is oxygen, sulfur or imino, and Z is either not present, lower alkyl or amino-lower alkyl
• R 6 a radical R 6 -sulfonylamino-lower alkyl, wherein R 6 is unsubstituted or substituted lower alkyl, unsubstituted, mono- or disubstituted amino or phenyl optionally substituted by lower alkyl, lower alkoxy or nitro
• Ri is hydrogen, unsubstituted or substituted lower alkyl or halogen
• X is selected from -O-, -NH- and -S-, or a salt thereof.
• Ri is hydrogen, unsubstituted or substituted lower alkyl or halogen
• Ri is hydrogen, unsubstituted or substituted lower alkyl or halogen
• R 2 is lower alkyl substituted by unsubstituted, mono- or disubstituted amino or by a heterocyclic radical having from 4 to 8 ring members and from 1 to 3 heteroatoms whereby at least one heteroatom is nitrogen and the binding of the heterocyclic radical to lower alkyl occurs via a nitrogen ring atom
• R 2 is amino-lower alkyl, N-lower alkylamino-lower alkyl, N,N-di-lower alkylamino-lower alkyl, morpholinyl-lower alkyl, piperidyl-lower alkyl, pyrrolidinyl-lower alkyl, lower alkyl-piperazinyl- lower alkyl, adamantanyl-amino-lower alkyl, hydroxy-piperidyl-lower alkyl, azepanyl-lower alkyl, di-lower alkyl-pyrrolidinyl-lower alkyl, azetidinyl-lower alkyl, aminocarbonyl-piperidyl-lower alkyl, pyridyl-piperazinyl-lower alkyl, thiomorpholinyl-lower alkyl, di-lower alkyl-morpholinyl- lower alkyl, aminocarbonyl-pyr
• Ri is hydrogen, lower alkyl or halogen
• R 2 is a radical selected from the group consisting of amino-lower alkyl, N-lower alkylamino- lower alkyl, N,N-di-lower alkylamino-lower alkyl, N-lower alkylaminocarbonyl, N,N-di-lower alkylaminocarbonyl, guanidino-lower alkyl, lower alkyl-sulfonylamino-lower alkyl, lower alkoxy-phenyl-sulfonylamino-lower alkyl, lower alkyl-phenyl-sulfonylamino-lower alkyl, nitro- phenyl-sulfonylamino-lower alkyl, N,N-di-lower alkylamino-sulfonylamino-lower alkyl, lower alkoxycarbonylamino-lower alkyl, lower alkoxy-lower alkoxycarbonylamino-low
• n, R ⁇ , R 3 , R 4 and X have the meanings as defined for a compound of formula I, is reacted with hydrazine;
• n, R ⁇ R 3 , R and X have the meanings as defined for a compound of formula I, is reacted with a compound of the formula R 5 -H wherein R 5 is unsubstituted, mono- or disubstituted amino;
• R ⁇ R 3 , R* and X have the meanings as defined for a compound of formula I, is reacted with a compound of the formula R ⁇ 3 -H, in which R 13 is unsubstituted, mono- or disubstituted amino or a heterocyclic radical containing at least one nitrogen ring atom wherein the heterocyclic radical is attached to the hydrogen atom of R 13 -H via a nitrogen ring atom;
• n, Ri, Rs, R t and X have the meanings as defined for a compound of formula I, is reacted with a compound of formula X
• R 2 has the meanings as defined for a compound of formula I;
• a compound of formula I thus obtained is converted into another compound of formula I, a free compound of formula I is converted into a salt, an obtained salt of a compound of formula I is converted into the free compound or another salt, and/or a mixture of isomeric compounds of formula I is separated into the individual isomers.
• hydrazine in the form of e.g. hydrazine monohydrate, preferably takes place in a suitable inert solvent, especially alcohols, e.g. lower alcohols, such as ethanol and in an inert, for example an argon, atmosphere, prefera- bly at room temperature (RT).
• a suitable inert solvent especially alcohols, e.g. lower alcohols, such as ethanol and in an inert, for example an argon, atmosphere, prefera- bly at room temperature (RT).
• RT room temperature
• Hydrazine is used in excess, preferably about 15 equivalents, compared to the compound of formula II.
• a suitable inert solvent such as for example anhydrous tetrahydrofuran (THF)
• reaction between a compound of formula I, in which R 2 is amino-lower alkyl, and R 6 - sulfonyl halide, in which Re is as defined above under formula I preferably takes place in the presence of triethylamine, in a suitable inert solvent, such as for example dichloromethane, and in an inert, for example an argon, atmosphere, preferably at about 0 °C.
• a suitable inert solvent such as for example dichloromethane
• an inert for example an argon
• reaction between a compound of formula VI and a compound of the formula R 13 -H preferably takes place in a suitable inert solvent, especially alcohols, e.g. lower alcohols, such as ethanol, preferably at the reflux temperature of the solvent employed.
• a suitable inert solvent especially alcohols, e.g. lower alcohols, such as ethanol, preferably at the reflux temperature of the solvent employed.
• Halogen is preferably chlorine or bromine.
• reaction between a compound of formula VII and a compound of the formula R 14 -H preferably takes place in a suitable inert solvent, such as for example acetonitrile, preferably at the reflux temperature of the solvent employed.
• a suitable inert solvent such as for example acetonitrile
• Halogen is preferably bromine.
• N-halosuccinimide is preferably N-bromosuccinimide.
• reaction between a compound of formula I, in which R-i is lower alkyl, and tetra(lower alkyl) tin preferably takes place in the presence of tetrakistriphenylphosphin palladium, in a suitable inert solvent, such as for example N,N-dimethylformamide, and in an inert, for example an argon, atmosphere, preferably at elevated temperature such as around 100 °C.
• reaction between a compound of formula IX and a compound of formula X preferably takes place in the presence of a suitable base, such as potassium carbonate, and in the presence of 18-crown-6 ether, in a suitable inert solvent, such as for example N,N- dimethylformamide, preferably at elevated temperature such as around 80 °C.
• a suitable base such as potassium carbonate
• 18-crown-6 ether in the presence of 18-crown-6 ether
• a suitable inert solvent such as for example N,N- dimethylformamide
• protecting groups of the starting compounds which should not take part in the reaction may be present in unprotected form or may be protected for example by one or more protecting groups.
• the protecting groups are then wholly or partly removed according to one of the known methods. Protecting groups, and the manner in which they are introduced and removed are described, for example, in "Protective Groups in Organic Chemistry", Plenum Press, London, New York 1973, and in “Methoden der organischen Chemie", Houben-Weyl, 4th edition, Vol. 15/1, Georg-Thieme-Verlag, Stuttgart 1974 and in Theodora W. Greene, "Protective Groups in Organic Synthesis", John Wiley & Sons, New York 1981.
• a characteristic of protecting groups is that they can be removed readily, i.e. without the occurrence of undesired secondary reactions, for example by solvolysis, reduction, photolysis or alternatively under physiological conditions.
• end products of formula I may however also contain substituents that can also be used as protecting groups in starting materials for the preparation of other end products of formula I.
• substituents that can also be used as protecting groups in starting materials for the preparation of other end products of formula I.
• a readily removable group that is not a constituent of the particular desired end product of formula I is designated a "protecting group", unless the context indicates otherwise.
• a compound of formula I can be converted to a corresponding N-oxide.
• the reaction is carried out with a suitable oxidizing agent, preferably a peroxide, for example m- chloroperbenzoic acid, in a suitable solvent, e.g. halogenated hydrocarbon, typically chloroform or dichloromethane, or in a lower alkanecarboxylic acid, typically acetic acid, preferably at a temperature between 0 °C and the boiling temperature of the reaction mixture, especially at about RT.
• a suitable oxidizing agent preferably a peroxide, for example m- chloroperbenzoic acid
• a suitable solvent e.g. halogenated hydrocarbon, typically chloroform or dichloromethane
• a lower alkanecarboxylic acid typically acetic acid
• All process steps described here can be carried out under known reaction conditions, preferably under those specifically mentioned, in the absence of or usually in the presence of solvents or diluents, preferably those that are inert to the reagents used and able to dissolve them, in the absence or presence of catalysts, condensing agents or neutralising agents, for example ion exchangers, typically cation exchangers, for example in the H + form, depending on the type of reaction and/or reactants at reduced, normal, or elevated temperature, for example in the range from -100 °C to about 190 °C, preferably from about -80 °C to about 150 °C, for example at -80 to -60 °C, at RT, at - 20 to 40 °C or at the boiling point of the solvent used, under atmospheric pressure or in a closed vessel, if need be under pressure, and/or in an inert, for example an argon or nitrogen, atmosphere.
• solvents or diluents preferably those that are in
• the invention relates also to those embodiments of the process in which one starts from a compound obtainable at any stage as an intermediate and carries out the missing steps, or breaks off the process at any stage, or forms a starting material under the reaction conditions, or uses said starting material in the form of a reactive derivative or salt, or produces a compound obtainable by means of the process according to the invention under those process conditions, and further processes the said compound in situ.
• a compound of formula I (or an N-oxide thereof) is prepared according to the processes and process steps defined in the Examples.
• the compounds of formula I (or N-oxides thereof), including their salts, are also obtainable in the form of hydrates, or their crystals can include for example the solvent used for crystallisation (present as solvates).
• New starting materials and/or intermediates, as well as processes for the preparation thereof, are likewise the subject of this invention.
• such starting materials are used and reaction conditions so selected as to enable the preferred compounds to be obtained.
• the starting materials used in the above described processes a) to q) are known, capable of being prepared according to known processes (see also WO 97/28161), or commercially obtainable; in particular, they can be prepared using processes as described in the Examples.
• a compound of formula II can be prepared for example by reacting a compound of formula VIII
• n, R ⁇ R 3 , R 4 and X have the meanings as defined for a compound of formula I, with phthalimide, in the presence of triphenylphosphine and diethyl azodicarboxylate, in an inert solvent, for example dry tetrahydrofuran, and in an inert, for example an argon, atmosphere, preferably at RT.
• a compound of formula VIII can be obtained according to process p) or q).
• a compound of formula IV can be prepared for example by reacting a compound of formula VIII with p-toluenesulfonyl halide, preferably p-toluenesulfonyl chloride, in an inert solvent, for example pyridine, preferably at -20 °C.
• p-toluenesulfonyl halide preferably p-toluenesulfonyl chloride
• an inert solvent for example pyridine
• a compound of formula V can be prepared for example by reacting a compound of formula I, in which R 2 is amino-lower alkyl, with halogen-lower alkylcarbonyl halide, preferably chloro- lower alkylcarbonyl chloride, in the presence of triethylamine, in an inert solvent, for example acetonitrile, preferably at RT.
• halogen-lower alkylcarbonyl halide preferably chloro- lower alkylcarbonyl chloride
• a compound of formula VII can be prepared for example by reacting a compound of formula I, in which R 2 is amino-lower alkyl, with halogen-lower alkyl halogen formate, preferably bromo-lower alkyl chloroformate, in the presence of triethylamine, in an inert solvent, for example dichloromethane, preferably at RT.
• the remaining starting materials are known, capable of being prepared according to known processes, or commercially available; or in particular, they can be prepared using processes as described in the Examples.
• compositions, methods, uses and combinations relate also to pharmaceutical compositions that comprise a compound of formula I, or a pharmaceutically acceptable salt thereof, as active ingredient and that can be used especially in the treatment of the diseases mentioned at the beginning.
• the present invention also relates to pro-drugs of a compound of formula I that convert in vivo to the compound of formula I as such. Any reference to a compound of formula I is therefore to be understood as referring also to the corresponding pro-drugs of the compound of formula I, as appropriate and expedient.
• compositions for enteral administration such as nasal, buccal, rectal or, especially, oral administration
• parenteral administration such as intravenous, intramuscular or subcutaneous administration, to warm-blooded animals, especially humans
• the compositions contain the active ingredient alone or, preferably, together with a pharmaceutically acceptable carrier.
• the dosage of the active ingredient depends upon the disease to be treated and upon the species, its age, weight, and individual condition, the individual pharmacokinetic data, and the mode of administration.
• the invention relates also to compounds of formula I, or a pharmaceutically acceptable salt thereof, as such or in the form of a pharmaceutical composition, for use in a method for the prophylactic or especially therapeutic treatment of the human or animal body, to a process for the preparation thereof (especially in the form of compositions for the treatment of tumours) and to a method of treating the above-mentioned diseases, primarily tumour diseases, especially those mentioned above.
• the invention relates also to processes and to the use of compounds of formula I, or a pharmaceutically acceptable salt thereof, for the preparation of pharmaceutical compositions which comprise compounds of formula I, or a pharmaceutically acceptable salt thereof, as active component (active ingredient).
• the said pharmaceutical compositions may also contain further active components, such as other chemotherapy drugs, and/or may be used in combination with known therapeutic processes, for example the administration of hormonal medicines or radiation.
• a pharmaceutical composition for the prophylactic or especially therapeutic management of neoplastic and other proliferative diseases of a warm-blooded animal, especially a human or a commercially useful mammal requiring such treatment, especially suffering from such a disease, comprising as active ingredient in a quantity that is prophylactically or especially therapeutically active against said diseases a new compound of formula I, or a pharmaceutically acceptable salt thereof, is likewise preferred.
• the pharmaceutical compositions comprise from approximately 1% to approximately 95% active ingredient, single-dose administration forms comprising in the preferred embodiment from approximately 20% to approximately 90% active ingredient and forms that are not of single-dose type comprising in the preferred embodiment from approximately 5% to approximately 20% active ingredient.
• Unit dose forms are, for example, coated and uncoated tablets, ampoules, vials, suppositories or capsules. Examples are capsules containing from about 0.05 g to about 1.0 g of active substance.
• compositions of the present invention are prepared in a manner known perse, for example by means of conventional mixing, granulating, coating, dissolving or ly- ophilising processes.
• the invention relates likewise to a process or a method for the treatment of one of the pathological conditions mentioned hereinabove, especially a disease which responds to an inhibition of the IGF-IR tyrosine kinase or of the IGF-IR-dependent cell proliferation, especially a corresponding neoplastic disease.
• the compounds of formula I, or a pharmaceutically acceptable salt thereof can be administered as such or in the form of pharmaceutical compositions, prophylactically or therapeutically, preferably in an amount effective against the said diseases, to a warm-blooded animal, for example a human, requiring such treatment, the compounds especially being used in the form of pharmaceutical compositions.
• the daily dose administered is from approximately 0.1 g to approximately 5 g, preferably from approximately 0.5 g to approximately 2 g, of a compound of the present invention.
• the present invention relates especially also to the use of a compound of formula I, or a pharmaceutically acceptable salt thereof, especially a compound of formula I which is said to be preferred, or a pharmaceutically acceptable salt thereof, as such or in the form of a pharmaceutical composition with at least one pharmaceutically acceptable carrier, for the therapeutic and also prophylactic management of one or more of the diseases mentioned hereinabove, preferably a disease which responds to an inhibition of the IGF-IR tyrosine kinase or of the IGF-IR-dependent cell proliferation, especially a neoplastic disease, in particular if the said disease responds to an inhibition of the IGF-IR tyrosine kinase or of the IGF-IR-dependent cell proliferation.
• the present invention relates especially also to the use of a compound of formula I, or a pharmaceutically acceptable salt thereof, especially a compound of formula I which is said to be preferred, or a pharmaceutically acceptable salt thereof, for the preparation of a pharmaceutical composition for the therapeutic and also prophylactic management of one or more of the diseases mentioned hereinabove, especially a neoplastic disease, in particular if the disease responds to an inhibition of the IGF-IR tyrosine kinase or of the IGF-IR-dependent cell proliferation.
• a compound of formula I may also be used to advantage in combination with other antiprolif- erative agents.
• antiproliferative agents include, but are not limited to aromatase inhibitors, antiestrogens, topoisomerase I inhibitors, topoisomerase II inhibitors, microtubule active agents, alkylating agents, histone deacetylase inhibitors, farnesyl transferase inhibitors, COX-2 inhibitors, MMP inhibitors, mTOR inhibitors, antineoplastic antimetabolites, platin compounds, compounds decreasing the protein kinase activity and further anti-angiogenic compounds, gonadorelin agonists, anti-androgens, bengamides, bisphosphonates and tras- tuzumab.
• aromatase inhibitors as used herein relates to compounds which inhibit the estrogen production, i.e. the conversion of the substrates androstenedione and testosterone to estrone and estradiol, respectively.
• the term includes, but is not limited to steroids, especially exemestane and formestane and, in particular, non-steroids, especially aminoglu- tethimide, vorozole, fadrozole, anastrozole and, very especially, letrozole.
• Exemestane can be administered, e.g., in the form as it is marketed, e.g. under the trademark AROMASINTM.
• Formestane can be administered, e.g., in the form as it is marketed, e.g.
• Fadrozole can be administered, e.g., in the form as it is marketed, e.g. under the trademark AFEMATM.
• Anastrozole can be administered, e.g., in the form as it is marketed, e.g. under the trademark ARIMIDEXTM.
• Letrozole can be administered, e.g., in the form as it is marketed, e.g. under the trademark FEMARATM or FEMARTM.
• Aminoglutethim- ide can be administered, e.g., in the form as it is marketed, e.g. under the trademark ORIMETENTM.
• a combination of the invention comprising an antineoplastic agent which is an aromatase inhibitor is particularly useful for the treatment of hormone receptor positive breast tumors.
• antiestrogens as used herein relates to compounds which antagonize the effect of estrogens at the estrogen receptor level.
• the term includes, but is not limited to ta- moxifen, fulvestrant, raloxifene and raloxifene hydrochloride.
• Tamoxifen can be administered, e.g., in the form as it is marketed, e.g. under the trademark NOLVADEXTM.
• Raloxifene hydrochloride can be administered, e.g., in the form as it is marketed, e.g. under the trademark EVISTATM.
• Fulvestrant can be formulated as disclosed in US 4,659,516 or it can be administered, e.g., in the form as it is marketed, e.g. under the trademark FASLODEXTM.
• topoisomerase I inhibitors includes, but is not limited to topotecan, irinotecan, 9-nitrocamptothecin and the macromolecular camptothecin conjugate PNU- 166148 (compound A1 in WO99/17804).
• Irinotecan can be administered, e.g., in the form as it is marketed, e.g. under the trademark CAMPTOSARTM.
• Topotecan can be administered, e.g., in the form as it is marketed, e.g. under the trademark HYCAMTINTM.
• topoisomerase II inhibitors includes, but is not limited to the antra- cyclines doxorubicin (including liposomal formulation, e.g. CAELYXTM), epirubicin, idarubicin and nemorubicin, the anthraquinones mitoxantrone and losoxantrone, and the podophillotox- ines etoposide and teniposide.
• Etoposide can be administered, e.g., in the form as it is marketed, e.g. under the trademark ETOPOPHOSTM.
• Teniposide can be administered, e.g., in the form as it is marketed, e.g.
• Doxorubicin can be administered, e.g., in the form as it is marketed, e.g. under the trademark ADRIBLASTINTM.
• Epirubicin can be administered, e.g., in the form as it is marketed, e.g. under the trademark FARMORUBICINTM.
• Idarubicin can be administered, e.g., in the form as it is marketed, e.g. under the trademark ZAVEDOSTM.
• Mitoxantrone can be administered, e.g., in the form as it is marketed, e.g. under the trademark NOVANTRONTM.
• microtubule active agents relates to microtubule stabilizing and microtubule destabilizing agents including, but not limited to the taxanes paclitaxel and docetaxel, the vinca alkaloids, e.g., vinblastine, especially vinblastine sulfate, vincristine especially vincristine sulfate, and vinorelbine, discodermolide and epothilones, such as epothilone B and D.
• Docetaxel can be administered, e.g., in the form as it is marketed, e.g. under the trademark TAXOTERETM.
• Vinblastine sulfate can be administered, e.g., in the form as it is marketed, e.g. under the trademark VINBLASTIN R.P.TM.
• Vincristine sulfate can be administered, e.g., in the form as it is marketed, e.g. under the trademark FARMISTINTM.
• Discodermolide can be obtained, e.g., as disclosed in US 5,010,099.
• alkylating agents includes, but is not limited to cyclophosphamide, ifosfamide and melphalan.
• Cyclophosphamide can be administered, e.g., in the form as it is marketed, e.g. under the trademark CYCLOSTINTM.
• Ifosfamide can be administered, e.g., in the form as it is marketed, e.g. under the trademark HOLOXANTM.
• histone deacetylase inhibitors relates to compounds which inhibit the histone deacetylase and which possess antiproliferative activity.
• farnesyl transferase inhibitors relates to compounds which inhibit the farnesyl transferase and which possess antiproliferative activity.
• COX-2 inhibitors relates to compounds which inhibit the cyclooxygenase type 2 enyzme (COX-2) and which possess antiproliferative activity such as celecoxib (Celebrex®) and rofecoxib (Vioxx®).
• MMP inhibitors relates to compounds which inhibit the matrix metalloproteinase (MMP) and which possess antiproliferative activity.
• mTOR inhibitors relates to compounds which inhibit the mammalian target of ra- pamycin (mTOR) and which possess antiproliferative activity such as sirolimus (Rapa- mune®), everolimus (CerticanTM), CCI-779 and ABT578.
• antimetabolites includes, but is not limited to 5-fluorouracil, 5- fluorouracil, tegafur, capecitabine, cladribine, cytarabine, fludarabine phosphate, fluorouridine, gemcitabine, 6-mercaptopurine, hydroxyurea, methotrexate, edatrexate and salts of such compounds, and furthermore ZD 1694 (RALTITREXEDTM), LY231514 (ALIMTATM), LY264618 (LOMOTREXOLTM) and OGT719.
• platinum compounds as used herein includes, but is not limited to carboplatin, cis- platin and oxaliplatin.
• Carboplatin can be administered, e.g., in the form as it is marketed, e.g. under the trademark CARBOPLATTM.
• Oxaliplatin can be administered, e.g., in the form as it is marketed, e.g. under the trademark ELOXATINTM.
• VEGF Vascular Endothelial Growth Factor
• EGF Epidermal Growth Factor
• c-Src c-Src and anti-angiogenic compounds having another mechanism of action than decreasing the protein kinase activity.
• Compounds which decrease the activity of VEGF are especially compounds which inhibit the VEGF receptor, especially the tyrosine kinase activity of the VEGF receptor, and compounds binding to VEGF, and are in particular those compounds, proteins and monoclonal antibodies generically and specifically disclosed in WO 98/35958 (describing compounds of formula I), WO 00/09495, WO 00/27820, WO 00/59509, WO 98/11223, WO 00/27819, WO 01/55114, WO 01/58899 and EP 0769 947; those as described by M. Prewett et al in Cancer Research 59 (1999) 5209-5218, by F. Yuan et al in Proc. Natl. Acad. Sci.
• compounds which decrease the activity of EGF are especially compounds which inhibit the EGF receptor, especially the tyrosine kinase activity of the EGF receptor, and compounds binding to EGF, and are in particular those compounds generically and specifically disclosed in WO 97/02266 (describing compounds of formula IV), EP 0564409, WO 99/03854, EP 0520722, EP 0566226, EP 0787722, EP 0837063, WO 98/10767, WO 97/30034, WO 97/49688, WO 97/38983 and, especially, WO 96/33980; compounds which decrease the activity of c-Src include, but are not limited to, compounds inhibiting the c-Src protein tyrosine kinase activity as defined below and to SH2 interaction inhibitors such as those disclosed in WO97/07131 and WO97/08193; compounds inhibiting the c-Src protein ty
• the term relates to those compounds disclosed in WO 96/10028, WO 97/28161, WO97/32879 and WO97/49706; anti-angiogenic compounds having another mechanism of action than decreasing the protein kinase activity include, but are not limited to e.g. thalidomide (THALOMID), SU5416, and celecoxib (Celebrex).
• anti-angiogenic compounds having another mechanism of action than decreasing the protein kinase activity include, but are not limited to e.g. thalidomide (THALOMID), SU5416, and celecoxib (Celebrex).
• gonadorelin agonist includes, but is not limited to abarelix, goserelin and goserelin acetate.
• Goserelin is disclosed in US 4,100,274 and can be administered, e.g., in the form as it is marketed, e.g. under the trademark ZOLADEXTM.
• Abarelix can be formulated, eg. as disclosed in US 5,843,901.
• anti-androgens as used herein includes, but is not limited to bicalutamide (CASODEXTM), which can be formulated, e.g. as disclosed in US 4,636,505.
• bengamides relates to bengamides and derivatives thereof having aniproliferative properties and includes, but is not limited to the compounds generically and specifically disclosed in WO00/29382, preferably, to the compound disclosed in Example 1 of WO00/29382.
• bisphosphonates as used herein includes, but is not limited to etridonic acid, clo- dronic acid, tiludronic acid, pamidronic acid, alendronic acid, ibandronic acid, risedronic acid and zoledronic acid.
• etridonic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark DIDRONELTM.
• Clodronic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark BONEFOSTM.
• Tidronic acid can be administered, e.g., in the form as it is marketed, e.g.
• SKELIDTM adenosylcholine
• Pamidronic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark AREDIATM.
• Alendronic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark FOSAMAXTM.
• Ibandronic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark BONDRANATTM.
• Risedronic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark ACTONELTM.
• Zoledronic acid can be administered, e.g., in the form as it is marketed, e.g. under the trademark ZOMETATM.
• trastuzumab can be administered, e.g., in the form as it is marketed, e.g. under the trademark HERCEPTINTM.
• compounds of formula I can be used in combination with standard leukemia therapies, especially in combination with therapies used for the treatment of AML.
• compounds of formula I can be administered in combination with e.g. farnesyl- transferase inhibitors and/or other drugs used for the treatment of AML, such as Daunorubi- cin, Adriamycin, Ara-C, VP-16, Teniposide, Mitoxantrone, Idarubicin and Carboplatinum.
• Example 1 To a solution of 3.84 g (7.25 mmol) of cis-2- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)- pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -isoindole-1,3-dione in 100 ml of dry ethanol are added dropwise at RT and under argon 3.75 g (3.64 ml; 74.96 mmol) of hydrazine monohydrate. After 2 h most of the starting material is not yet dissolved, and additional 1.6 ml of hydrazine monohydrate are added thereto (total amount: 14.8 equivalents). The reaction is complete after 20 h.
• Step 1.1 To a solution of 3.5 g (8.74 mmol) of cis- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)- pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutyl ⁇ -methanol, which is prepared as described in Example 47(b) of WO 97/28161 , in 70 ml of dry THF are added under argon 2.75 g (10.5 mmol) of triphenylphosphine and 1.54 g (10.5 mmol) of phthalimide; 1.9 g (1.71 ml; 10.5 mmol) of diethyl azodicarboxylate (96%) are added dropwise thereto.
• Example 2 To a solution of 4.15 g (7.83 mmol) of trans-2- ⁇ 3-[4-amino-5-(3-benzyloxy- phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -isoindole-1 ,3-dione in 100 ml of dry ethanol are added dropwise at RT and under argon 5.87 g (5.7 ml; 117.5 mmol) of hydrazine monohydrate. After 20 min all the starting material is dissolved, and the reaction is complete after 20 h stirring at RT. The colorless precipitate is filtered off, and washed with ethanol.
• Step 2.1 To a solution of 5 g (12.48 mmol) of trans- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)- pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutyl ⁇ -methanol, which is prepared as described in Example 47(b) of WO 97/28161, in 100 ml of dry THF are added under argon 4.91 g (18.72 mmol) of triphenylphosphine and 2.75 g (18.7 mmol) of phthalimide; 3.36 g (3.02 ml; 18.7 mmol) of diethyl azodicarboxylate (96%) are added dropwise thereto.
• reaction mixture is stirred at RT for 27 h.
• the reaction mixture is concentrated to dryness and the crude compound is pu- rified by flash-chromatography (ethylacetate) to obtain trans-2- ⁇ 3-[4-amino-5-(3-benzyloxy- phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -isoindole-1 ,3-dione.
• Example 3 To a solution of 45 mg (0.11 mmol) of cis-3-[4-amino-5-(3-benzyloxy-phenyl)- pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutanecarboxylic acid in 2 ml of N,N-dimethylformamide is added 36 mg (0.12 mmol) of O-(1,2-dihydro-2-oxo-1-pyridyl)-1,1,3,3-tetramethyluronium tetrafluoroborate and 39 ⁇ l (0.23 mmol) of diisopropylethylamine. 40 ⁇ l of a 5.6 M solution of dimethylamine are added thereto.
• Example 5 cis-3-[4-Amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]- cyclobutanecarboxylic acid methylamide is obtained as described in Example 3 using a 8.03 M solution of methylamine in ethanol.
• Example 9 cis-5-(3-Benzvloxv-phenv ⁇ -7-(3-methvlaminomethvl-cvclobutvl)-7H-pvrrolo[2.3- d]pyrimidin-4-ylamine is prepared as described in Example 7 starting with cis-3-[4-amino-5- (3-benzyloxy-phenyI)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutanecarboxylic acid methylamide.
• Example 10 trans-5-(3-Benzvloxv-phenyl)-7-(3-methvlaminomethyl-cyclobutvl)-7H- pyrrolo[2,3-d]pyrimidin-4-ylamine is prepared as described in Example 7 starting with trans- 3-[4-amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutanecarboxylic acid methylamide.
• Example 13 To a solution of 50 mg (0.125 mmol) of trans-7-(3-aminomethyl-cyclobutyl)-5- (3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine in 2 ml of dry dichloromethane are added at 0°C and under argon 10 ⁇ l (0.131 mmol) of methanesulfochloride and 44 ⁇ l (0.313 mmol) of triethylamine. After 20 h, working-up is effected by partitioning between water and dichloromethane.
• ExarnoJe 24 trans- ⁇ 3-[4-Amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]- cyclobutylmethylj-carbamic acid 2-methoxy-ethyl ester is prepared as described in Example
• Example 40 To a solution of 41 mg (0.075 mmol) of trans- ⁇ 3-[4-amino-5-(3-benzyloxy- phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -3-(2-bromo-ethyl)-urea, which is prepared as described in Example 26 using 2-bromoethyl isocyanate (Aldrich, Buchs, Switzerland), in 5 ml of ethanol is added 33 ⁇ l (0.375 mmol) of morpholine.
• Example 45 cis-1- ⁇ 3-[4-Amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]- cyclobutylmethyl ⁇ -3-(3-morpholin-4-yl-propyl)-urea is prepared as described in Example 40 using cis-7-(3-aminomethyl-cyclobutyl)-5-(3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4- ylamine and 3-chloropropyl isocyanate.
• Example 47 cis-1- ⁇ 3-[4-Amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]- cyclobutylmethyl ⁇ -3-(3-dimethylamino-propyl)-urea is prepared as described in Example 40 using cis-7-(3-aminomethyl-cyclobutyl)-5-(3-ben__yloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4- ylamine, 3-chloropropyl isocyanate and dimethylamine.
• Example 48 To a solution of 50 mg (0.125 mmol) of trans-7-(3-aminomethyl-cyclobutyl)-5- (3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine in 5 ml of methanol is added 45 mg (0.561 mmol) of potassium cyanate (Aldrich, Buchs, Switzerland). The mixture is refluxed for one week.
• Example 50 To a solution of 50 mg (0.125 mmol) of trans-7-(3-aminomethyl-cyclobutyl)-5- (3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine in 2 ml of anhydrous N,N- dimethylformamide is added 13 ⁇ l (0.138 mmol) of acetic anhydride (Fluka, Buchs, Switzerland). After stirring 1 h at RT, working-up is effected by partitioning between water and ethyl acetate.
• Example 56 48 mg (0.1 mmol) of trans-N- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3- d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -2-chloro-acetamide and 25 ⁇ l (0.3 mmol) of piperidine in 5 ml of ethanol are refluxed for 2 h.
• trans-N- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3- d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -2-piperidin-1-yl-acetamide is obtained after purification of the crude mixture by medium-pressure liquid chromatography.
• Step 56.1 To a suspension of 210 mg (0.53 mmol) of trans-7-(3-aminomethyl-cyclobutyl)-5- (3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine in 10 ml of acetonitrile is added 49 ⁇ l (0.61 mmol) of chloro-acetyl chloride (Fluka, Buchs, Switzerland) and 85 ⁇ l (0.61 mmol) of triethylamine. The solution is stirred for 5 h at RT.
• chloro-acetyl chloride Fruka, Buchs, Switzerland
• Example 58 trans-N- ⁇ 3-r4-Amino-5-(3-ben__vloxy-phenvl)-pvrrolof2,3-d1pyrimidin-7-vn- cyclobutylmethyl ⁇ -2-morpholin-4-yl-acetamide is obtained as described in Example 56 using morpholine.
• Example 59 cis-N- ⁇ 3-[4-Amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]- cyclobutylmethyl ⁇ -2-morpholin-4-yl-acetamide is obtained as described in Example 56 starting with cis-7-(3-aminomethyl-cyclobutyl)-5-(3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin- 4-ylamine and using morpholine.
• Example 61 cis-N-(3-r4-Amino-5-(3-benzvloxv-phenv ⁇ -pvrrolof2,3-d1pvrimidin-7-v ⁇ - cyclobutylmethyl ⁇ -2-(4-methyl-piperazin-1-yl)-acetamide is obtained as described in Example 56 starting with cis-7-(3-aminomethyl-cyclobutyl)-5-(3-benzyloxy-phenyl)-7H-pyrrolo[2,3- d]pyrimidin-4-ylamine and using 1-methyl-piperazine.
• Example 62 A solution of 50 mg (0.09 mmol) of trans-toluene-4-sulfonic acid 3-[4-amino-5- (3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ester in 1 ml of morpholine (Fluka, Buchs, Switzerland) is stirred at RT for 72 h. The solvent is evaporated to dryness and the residue is purified by flash-chromatography (ethylace- tate:methanol:NH 4 OH a qu.
• Step 62.1 200 mg (0.49 mmol) of trans- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3- d]pyrimidin-7-yl]-cyclobutyl ⁇ -methanol, which is prepared as described in Example 47(b) of WO 97/28161 , are dissolved in 2 ml of pyridine and the solution is cooled to -20 °C. 153 mg (0.8 mmol) of p-toluenesulfonyl chloride are added to this solution and the reaction mixture is left overnight in the freezer at -20 °C. Then, 10 ml of ice-cold water are added and the mixture is extracted with cold dichloromethane.
• Example 66 50 mg (0.09 mmol) of trans-toluene-4-sulfonic acid 3-[4-amino-5-(3-benzyloxy- phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ester and 34 mg (0.225 mmol) of ada- mantan-1-ylamine (Fluka, Buchs, Switzerland) in 1 ml N,N-dimethylformamide are stirred for 18 h at RT and for 24 h at 60° C. Additional adamantan-1-ylamine is added (34 mg) and stirring is continued for 24 h at 120° C.
• ada- mantan-1-ylamine Fruka, Buchs, Switzerland
• Example 89 To a suspension of 0.2 g (0.5 mmol) of trans-7-(3-aminomethyl-cyclobutyl)-5- (3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine in 5 ml of acetonitrile are added under argon 108 mg (0.65 mmol) of 1,1-carbonyldiimidazole (Fluka, Buchs, Switzerland) and 628 ⁇ l (4.5 mmol) of triethylamine. The reaction mixture is stirred for 15 min at RT and 414 ⁇ l (5.0 mmol) of pyrrolidine (Fluka, Buchs, Switzerland) are added thereto.
• Example 95 To a solution of 0.2 g (0.5 mmol) of trans-7-(3-aminomethyI-cyclobutyl)-5-(3- benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine in 5 ml of dichloromethane are added 55.4 ⁇ l (0.5 mmol) of 2-bromoethyl chloroformate (Fluka, Buchs, Switzerland) and 70 ⁇ l (0.5 mmol) of triethylamine. After stirring for 2 h at RT, the solution is concentrated to dryness.
• 2-bromoethyl chloroformate Fluka, Buchs, Switzerland
• the crude compound is dissolved in 5 ml of acetonitrile and 260 ⁇ l (2.5 mmol) of di- ethylamine (Fluka, Buchs, Switzerland) are added thereto.
• the reaction mixture is refluxed for 16 h and, after concentration, the crude compound is purified by medium-pressure liquid chromatography to provide trans- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin- 7-yl]-cyclobutylmethyl ⁇ -carbamic acid 2-diethylamino-ethyl ester.
• Example 104 trans-3-[4-Amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin-7- yl]-cyclobutanecarboxylic acid methyl ester
• the reaction mixture is filtered on hyflo (Hyflo Super Cel®; Fluka, Buchs, Switzerland), and the residue washed thouroughly with N,N- dimethylformamide.
• the dark filtrate is evaporated at 60°C to dryness, the residual mass dissolved in hot ethyl acetate and chromatographed on silicagel (hexane-ethyl acetate 25:75). The title compound is obtained as yellow crystals.
• Example 105 trans- ⁇ 3-[4-Amino-5-(3-benzyIoxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin-7- yl]-cyclobutyl ⁇ -methanol 2.94 g (6.64 mmol) trans-3-[4-amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3- d]pyrimidin-7-yl]-cyclobutanecarboxylic acid methyl ester of Example 104 in 35 ml dry THF are added during 45 min to an ice-cold solution of 0.281 g (7.17 mmol) lithium aluminiumhy- dride in 30 ml dry THF.
• the reaction mixture is stirred at 0°C for additional 20 h. Water is added slowly to the mixture (0.914 ml in 20 min; T_3.°C), followed by 0.11 ml 4N NaOH. The precipitate is filtered off, the residue on the filter washed with ethyl acetate and water. The filtrate is extracted with ethyl acetate. After drying the organic phase with sodium sulfate, the solvent is evaporated and the residue purified by chromatography (solvent: ethyl acetate- MeOH 95:5). The title compound is obtained as a foam.
• Example 106 trans-Toluene-4-sulfonic acid 3-[4-amino-5-(3-benzyloxy-phenyl)-6-methyl- pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutylmethyl ester
• Example 107 trans-5-(3-Benzvloxv-phenvl .-6-methvl-7-(3-pvrrolidin-1 -vlmethvl-cvclobutvl .- 7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• Example 108 trans-5-(3-Benzyloxv-phenvl .-6-methyl-7-[3-.4-methyl-piperazin-1 -ylmethyl)- cyclobutyl]-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• Example 109 trans-1 -(3-f4-Amino-5-(3-benzvloxv-phenvl)-6-methvl-pvrrolo[2.3-dlpvrimidin- 7-yl]-cyclobutylmethyl ⁇ -piperidin-4-ol
• Example 110 trans-7-(3-Azetidin-1-vlmethvl-cvclobutvl)-5-(3-benzvloxv-phenv ⁇ -6-methvl-7H- pyrroIo[2,3-d]pyrimidin-4-ylamine
• Example 111 trans-5-(3-Benzyloxv-phenvl .-6-methvl-7-(3-. (tetrahydro-pyran-4-vlamino.- methyl]-cyclobutyl ⁇ -7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• Example 112 trans-((R)-1-(3-[4-Amino-5-(3-benzvloxv-phenvl)-6-methvl-pyrrolor2.3- d]pyrimidin-7-yl]-cyclobutylmethyl ⁇ -pyrrolidin-2-yl)-methanol
• the title compound is prepared in analogy to Example 103 starting from 12.9 g (30.11 mmol) cis-3-[4-amino-5-(3-benzyloxy-phenyl)-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutanecarboxylic acid methyl ester (see Step 3.1 above) and 6.07 g (33.12 mmol) N-bromosuccinimide in 250 ml dry N,N-dimethylformamide. After work-up, the raw material is purified by chromatography on silicagel (solvent: hexane-ethyl acetate 1:1).
• Example 114 cis-3-[4-Amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin-7-yl]- cyclobutanecarboxylic acid methyl ester
• Example 105 The title compound is obtained in analogy to Example 105 starting from 2.06 g cis-3-[4- amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutanecarboxylic acid methyl ester of Example 114 and 0.216 mmol lithium aluminiumhydride in 20 ml dry
• Example 116 cis-5-(3-Benzyloxy-phenyl)-6-methyl-7-(3-pyrrolidin-1-ylmethyl-cyclobutyl)-7H- pyrrolo[2,3-d]pyrimidin-4-ylamine
• the title compound is prepared in a one pot reaction in analogy to Example 116 starting from 0.35 g (0.84 mmol) cis- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin- 7-yl]-cyclobutyl ⁇ -methanol and 0.328 g (1.69 mmol) p-toluenesulfonyl chloride in 3.5 ml dry pyridine, followed by 3.5 ml (31.2 mmol) 1 -methyl piperazine.
• Example 118 cis-7-(3-Azetidin-1-ylmethyl-cyclobutyl)-5-(3-benzyloxy-phenyl)-6-methyl-7H- pyrrolo[2,3-d]pyrimidin-4-ylamine
• the title compound is prepared in analogy to Example 116 starting from 0.35 g (0.84 mmol) cis- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutyl ⁇ - methanol and 0.328 g (1.69 mmol) p-toluenesulfonyl chloride in 3.5 ml dry pyridine, followed by 0.442 ml (6.33 mmol) trimethylenimine (Fluka, Buchs, Switzerland).
• the title compound is prepared in analogy to Example 116 starting from 0.35 g (0.84 mmol) cis- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-6-methyl-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutyl ⁇ - methanol and 0.328 g (1.69 mmol) p-toluenesulfonyl chloride in 3.5 ml dry pyridine, followed by 0.87 g (8.44 mmol) 4-hydroxypiperidine (Fluka, Buchs, Switzerland).
• Example 121 5-(3-Benzyloxy-phenyl)-6-bromo-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• 20 g 63.2 mmol
• 5-(3-benzyloxy-phenyl)-7H-pyrrolo[2,3-d]pyrimidin-4- ylamine 1 I dry N,N-dimethylformamide
• 12.4 g (69.5 mmol) N- bromosuccinimide are added at ca. 10°C.
• Stirring was continued at ca. 10°C for 30 min and overnight at RT.
• the precipitate formed is filtered off and washed thoroughly with N,N- dimethylformamide and hexane.
• Additinonal material can be obtained from the mother liquor through chromatography on silicagel.
• Example 122 5-(3-Benzyloxy-phenyl)-6-ethyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• a sealed tube 12.53 g (31.7 mmol) 5-(3-ben__yloxy-phenyl)-6-bromo-7H-pyrrolo[2,3- d]pyrimidin-4-ylamine, 32 ml (158.5 mmol) tin tetraethyl (Aldrich), and 7.32 g (6.34 mmol) tetrakis triphenylphosphin palladium are heated under Argon at 90°C for 66 h (reaction control by HPLC and MS).
• reaction suspension is filtered on hyflo and the solvent evaporated on a rotavap under high vacuum at 50-60°C.
• the residue is partitioned between ethyl acetate and water.
• the organic phase is dried over sodium sulfate and is evaporated.
• the residue is purified by chromatography on silicagel (ethyl acetate-methanol 95:5). Crystallization is done from acetone.
• Example 126 cis-5-(3-Ben__yloxy-phenyl)-6-ethyl-7-(3-pyrrolidin-1-ylmethyl-cyclobutyl)-7H- pyrrolo[2,3-d]pyrimidin-4-ylamine
• the title compound is prepared in a one pot reaction in analogy to Example 116 starting from 0.2 g (0.46 mmol) cis- ⁇ 3-[4-amino-5-(3-benzyloxy-phenyl)-6-ethyl-pyrrolo[2,3-d]pyrimidin-7- yl]-cyclobutyl ⁇ -methanol of Example 124 and 0.18 g (0.92 mmol) p-toluenesulfonyl chloride in 2 ml dry pyridine followed by 2 ml pyrrolidine. The reaction is controlled by tic.
• Example 127 cis-5-(3-Benzyloxy-phenyl)-6-ethyl-7-[3-(4-methyl-piperazin-1-ylmethyl)- cyclobutyl]-7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• Example 128 cis-7-.3-Azetidin-1 -vlmethvl-cvclobutvl .-6-ethvl-5-(3-[.Z .-2-eth-. E ,-vlidene- hexa-3,5-dienyloxy]-phenyl ⁇ -7H-pyrrolo[2,3-d]pyrimidin-4-ylamine
• the title compound is prepared in analogy to Example 116 from cis- ⁇ 3-[4-amino-5-(3- benzyloxy-phenyl)-6-ethyl-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutyl ⁇ -methanol of Example 124, p-toluenesulfonyl chloride and trimethylenimin (Fluka, Buchs, Switzerland).
• Example 130 cis-((R)-1- ⁇ 3-[4-Amino-5-(3-benzyloxy-phenyl)-6-ethyl-pyrrolo[2,3-d]pyrimidin-
• Example 116 The title compound is prepared in analogy to Example 116 from cis- ⁇ 3-[4-amino-5-(3- benzyloxy-phenyl)-6-ethyl-pyrrolo[2,3-d]pyrimidin-7-yl]-cyclobutyl ⁇ -methanol of Example 124, p-toluenesulfonyl chloride and teztrahydropyran-4-ylamin (see Example 111). Analytical
• Example 132 Test for activity against IGF-I induced IGF-IR autophosphorylation using the cellular "Capture ELISA” test
• Tablets comprising 50 mg of active ingredient, for example one of the compounds of formula I described in Examples 1 to 131, and having the following composition are prepared in customary manner:
• composition active ingredient 50 mg wheat starch 150 mg lactose 125 mg colloidal silicic acid 12.5 mg talc 22.5 mg magnesium stearate 2.5 mg
• Preparation The active ingredient is mixed with a portion of the wheat starch, with the lactose and the colloidal silicic acid and the mixture is forced through a sieve. A further portion of the wheat starch is made into a paste, on a water bath, with five times the amount of water and the powder mixture is kneaded with the paste until a slightly plastic mass is obtained.
• the plastic mass is pressed through a sieve of about 3 mm mesh size and dried, and the resulting dry granules are again forced through a sieve. Then the remainder of the wheat starch, the talc and the magnesium stearate are mixed in and the mixture is compressed to form tablets weighing 145 mg and having a breaking notch.
• composition active ingredient 250 g
• the pulverized active ingredient is suspended in Lauroglykol® (propylene glycol laurate, Gattefosse S.A., Saint Priest, France) and ground in a wet pulverizer to a particle size of approx. 1 to 3 ⁇ m. 0.419 g portions of the mixture are then dispensed into soft gelatin capsules using a capsule-filling machine.
• Lauroglykol® propylene glycol laurate, Gattefosse S.A., Saint Priest, France

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