WO2005105804A1

WO2005105804A1 - 7H-PYRROLO[2,3-d]PYRIMIDINE DERIVATIVES, AS WELL AS THEIR THERAPEUTICALLY ACCEPTABLE SALTS, PHARMACEUTICAL PREPARATIONS CONTAINING THEM AND PROCESS FOR PRODUCTION THE ACTIVE AGENT

Info

Publication number: WO2005105804A1
Application number: PCT/HU2005/000040
Authority: WO
Inventors: János SZOLCSÁNYI; László Orfi; György Kéri; Frigyes Wáczek; Erika Pintér; Zsuzsanna Helyes; Tamás Szüts; József NÉMETH
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-29
Filing date: 2005-04-25
Publication date: 2005-11-10
Anticipated expiration: 2006-10-29
Also published as: US20080214583A1; RU2006141393A; ATE462706T1; CA2564277A1; KR20070047737A; IL178906A0; CN1972946A; RU2391344C2; HUP0400891A2; EP1756110A1; DE602005020281D1; HU0400891D0; EP1756110B1; JP2007534737A; AU2005238287A1

Abstract

The invention relates to new 7H-pyrrolo[2,3-d]pyrimidine derivatives, as well as their therapeutically acceptable salts, pharmaceutical preparations containing them and process for producing the active agent. The pharmaceutical preparation is adventageously antiphlogistic and analgetic one, a preparation reducing neuropathic hyperalgesia and rheumatic arthritis, a preparation for hindering destruction of bones chondrus, being applicable for treatment of other diseases, which may be connected with other inflammatory processes e.g. asthma, eczema or psoriasis.

Description

A 7H-pyrroIo[2,3-d]pyrimidine derivatives, as well as their therapeutically acceptable salts, pharmaceutical preparations containing them and process for producing the active agent.

The invention relates to new 7H-pyrrolo[2,3-d]pyτimidine derivatives, as well as their therapeutically acceptable salts, pharmaceutical preparations containing them and process for producing the active agent.

The compounds of general formula (I) are basic substances of pharmaceutical preparations of neurogenic and not neurogenic antiphlogistic, as well as paregoric effect, neuropathic hyperalgesia reducing ones, those for hindering rheumatic arthritis or treatment of destruction of bone or chondrus in joints, as well as for other diseases, which may be connected with other inflammatory processes e. g. asthma, eczema, psoriasis.

The compounds according to the general formula (I) are new. Their characteristic types may be described by general formulae (la), (ϊb) and (lc).

The compounds of 7H-pyτrolo[2,3-d]pyτimidine derivatives other than the above mentioned ones are known in the special literature as quinase inhibitors and anti- tumor agents acting in this way.

An important structural characteristic of the known active quinase inhibiting 7H- pyrrolo[2,3-d]pyrimidme derivatives is that only one from among the nitrogen atoms the one of pyrrhol in the position 7 and the other of the amine function connected to the fourth position may carry substituent (J. Med. Chem. 39 (1996) 2285-2292,Bioorg. Med. Chem. Letters 11 (2001) 849-852). In the case of compounds according to invention both of the above indicated places carry substituents.

Thus, the invention relates to 7H-pyrrolo[2,3-d]pyrimidine derivatives of the general formula (I), and to their therapeutically acceptable salts.

In the general formula (I):

RI is alkyl, aryl, heteroaryl or aryl-alkyl with 1-4 carbon atoms group, heteroaryl- alkyl with 1-4 carbon atoms group, morpholino-alkyl with 1-4 carbon atoms group or dialkylamino-alkyl with 1-4 carbon atoms group.

R2, R3 independently of each other are hydrogen, methyl, ethyl, propyl, isopropyl or cyclopropyl groups or R2 and R3 together are tetramethylene group.

R4 is

-R5 // — N

or 1

group, wherein: R5 is substituted or unsubstituted aromatic or heteroaromatic ring where

R6, R7, R8 and R9 are independently hydrogen, halogen, nitro, amino, alkylamino, dialkylamino, hydroxy, methoxy, ethoxy, isopropoxy or sulfonyl group,

RIO is hydrogen or nitrile group,

Rl l is hydrogen, methyl, ethyl, propyl, isopropyl, tert.- butyl group or tetramethylene ring connected to X

R12 is alkyl, aryl, heteroaryl, aryl-alkyl with 1-4 carbon atoms, heteroaryl-alkyl with 1-4 carbon atoms, morpholino-alkyl with 1-4 carbon atoms or dia-U lamino-alkil with 1-4 carbon atoms group,

X is carbon if RI 1 is a tetramethylene ring connected to X, otherwise nitrogen, methine, methyl-methine emyl-methine, propyl-methine, isopropyl-methine, cyclopropyil-methine, tert.- butyl-methine or phenyl-methine group.

The therapeutically acceptable salts are advantageously acid-additive ones.

The most characteristic compounds of the general formula (I) may be defined by general formula (la), (lb) and (Ic) where RI, R2, R3, R5, R6, R7, R8, R9, RIO, RI 1, R12 and X are the same as mentioned above.

The invention relates also to a pharmaceutical preparation containing the compound of general formula (I) as active substance and therapeutically acceptable additives.

The pharmaceutical preparation is advantageously antiphlogistic and analgetic one, a preparation reducing neuropathic hyperalgesia and rheumatic arthritis, a preparation for hindering destruction of bones or chondrus, being applicable for treatment of other diseases, which may be connected with other inflaimnatory processes e. g. asthma, eczema or psoriasis.

The invention relates furthermore to a process for producing 7H-pyrrolo[2,3- d]pyrimidine derivatives of the general formula (I).

The process may be characterized in that a compound of general formula (II) is produced from acetoine with amine and malononitrile of molar equivalent quantities where RI, R2 and R3 are the same as mentioned above.

Formic acid of mass excess of 5 to 10 times is added, the mixture is mixed at reflux temperature for 1 hour to 2 days then the mixture is poured into icy water. The precipitated product is separated, dried then brought into reaction with phosphorus oxychloride of 5 to 10 times as much as the product at reflux temperature for 0.5 to 4 hours then the mixture is poured onto ice and the precipitated imidoyl chloride of general formula (III) where RI, R2 and R3 are the same as mentioned above is separated, dried and evaporated then A) The imidoyl chloride of general formula (III) produced in the above mentioned way is solved in an aprotic solvent and brought into reaction with amine of general formula (II) or (IV) of equivalent quantity where RI and R3 are the same as above in the formulas and NaH of 2 to 10 times of molar eqivalent excess is added. The reaction continues for 0.5 to 6 hours. The mixture is then poured onto ice and the precipitated product is separated and purified. or B) the imidoyl chloride of general formula (III) produced in the above mentioned way is brought into reaction with hydrazine hydrate of 2 to 10 times of molar equivalent excess in a medium of polar organic solvent then the reaction product in the organic phase is separated, the organic phase is dried, evaporated then bruised with an apolar solvent. The hydrazine derivative produced in this way is mixed with a polar solvent and brought into reaction with aldehyde of equivalent quantity at 20 to 120 C° for 1 to 12 hours then the reaction product is separated. or C) The hydrazine derivative produced according to the process described in

B) is mixed with a polar organic solvent, brought into reaction with isatin of equivalent quantity then the reaction product is separated.

The compound of general formula (II) is produced in such a way that acetoine is brought into reaction with amine and malonic acid dinitrile of molar equivalent quantities. The compounds of general formula (II) are produced in this way. The reaction can be carried out in two stages in the same reaction mixture using either acidic or alkaline catalyst.

In the first stage the acetoine is brought into reaction with the suitable amine always with acidic catalyst (concentrated HC1 or toluene sulphonic acid) in aprotic solvent (advantageously in toluene or benzene) at reflux temperature using water separating additive until the whole water produced in the reaction is removed then malononitrile is added and the mixture is kept at reflux temperature until removal of water of equivalent quantity.

If amines of aniline type are used the solvent is changed to a protic one advantageously methanol, ethanol or isopropanol and they are brought into reaction with malonic acid dinitrile using alkaline medium (aqueous solution of KOH or NaOH) in inert atmosphere. The intermediate compound of general formula (II) is filtered having cooled the mixture then mixed with formic acid of 5 to 10 mass excess (of 85 to 98 mass %) at reflux temperature for 1 hour to 2 days. The mixture is then poured onto icy water and the precipitated product is isolated either by filtering or extraction with ethyl acetate at neutral pH.

The product is thoroughly dried in both cases then brought into reaction with phosphorus oxychloride of 5 to 10 times of mass excess at reflux temperature for 0.5 to 4 hours. The mixture containing phosphorus oxychloride is poured onto ice and having set pH to neutral the precipitated imidoyl chloride of general formula (III) is either filtered or extracted with ethyl acetate, then the combined organic phase is dried and evaporated. The imidoyl chloride of general formula (III) obtained after filtering or extracting and evaporation is solved in an aprotic solvent (THF, dioxane, DMSO or DMF) or in the mixture of them.

In the version A) of the process the imidoyl chloride of the general formula (III) is brought into reaction with amine of general structure (II) or (IV) of equivalent quantity adding NaH of molar equivalent excess of 2 to 10 times for 0.5 to 6 hours. The reaction mixture is poured onto ice-water and processed, the precipitated product is filtered and the compounds of general formula (la) are produced by crystallizing from dioxane ethylacetate hexane mixture.

In the version B) of the process the imidoyl chloride of the general formula (III) produced in the above described way is brought into reaction with hydrazine hydrate of molar equivalent excess of 2 to 10 in a polar organic solvent (advantageously in methanol, ethanol, isopropanol, DMF, DMSO or in a mixture of any proportion of these solvents) then the solvent is removed under reduced pressure and thereafter the product received in this way is separated between ethyl acetate and water.

The organic phase is evaporated after drying and the hydrazine derivative is received by treating the residue with an apolar solvent (advantageously with hexane or ether), which is brought into reaction with aldehydes in a polar organic solvent (advantageously in methanol, ethanol, isopropanol, DMF, DMSO solvent or in glacial acetic acid) at a temperature of 20 to 100 C° for 1 to 12 hours. If the solvent is adequately chosen the product precipitates and may be separated by filtering after cooling of the mixture.

The compounds of the general formula (lb) are obtained after a washing with an apolar solvent (advantageously with ether or hexane).

The version C) of the process is performed similarly but the hydrazine derivative is brought into reaction with isatin.

The compounds of general formula (Ic) are produced in this way.

The intermediate compounds used in the process according to the invention are partly known as intermediate products of the above mentioned kinase inhibitor compounds, such as im2_l to im3_3, im3_5 and im4_l to 4, they are partly new such as the compounds given in the examples 3, 5, 6, and 8 to 11 (see Table 1).

The essence of the invention is based also on the recognition that new structures may be created by linking together the reactive intermediate products of known biologically active compounds using the process described in the Example 4 and compounds of new structures are obtained having astoundingly different effects from those of the known compounds.

The essence of the process given in the Example 4 is that amines of general formulas (II) and (IV) solved in anhydrous dimethyl sulfoxide can be transformed into sodium salts by adding sodium hydride and the salts can be combined with imidoyl chlorides characterized by the general formula (III) at room temperature, and compounds of general structure (la) may be obtained in this way.

Connection of imidoyl chlorides and heterocyclic amines in presence of sodium hydride, as well as the received pyrazolyl amino and pyrrolyl amino derivatives are unknown in the literature.

Compounds having the same biological effect may be obtained also in the way that imidoyl chlorides characterized by the general formula (III) are brought into reaction first with hydrazine hydrate in a medium containing ethanol and the 4- hydrazmo-7H-pyτrolo-[2,3-d]pyrimidine derivatives obtained in this way are brought into reaction with aldehydes or isatins as described in the Examples 7 and 12 to 15 and compounds of general formulas (lb) or (Ic) are obtained in this way.

Condensation reactions of benzaldehydes and isatins in ethanol containing medium are well-known in the literature but from among the hydrazones obtainable from 4- hydrazino-7H-pyrrolo[2,3-d]pyτimidine derivatives only those having phenyl substituent in the position 5 are described up to now (J. Chem. Res. Miniprint 12 (1997) 2771-2789). These known 5 -phenyl derivatives proved to be completely ineffective in the models of inflammations described in the invention.

Table 1.

The compounds according to the invention are analgesic and antiphlogistic ones, which may be potentially orally administered.

An opportunity emerged to hinder neurogenic inflammation wherein the sensory neuronopeptides such as substance P (SP) or calcitonine gene related peptide (CGRP) released from primary afferents have important role, as well as to discover an analgesic of new type on the base of efficiency examination of heptapeptide somatostatine analogue TT-232.

We found out on the base of our previous examinations that that the TT-232 is a potent analgesic hindering both the neurogenic and non-neurogenic inflammation, which is effective also in the neuropathic nociceptive model. As the TT-232 is a peptide structure and cannot be orally absorbed, we began simultaneously with the clinical trials examinations of the compound to examine its peptidomimetic analogues to create a compound, which may be orally absorbed and has a wide spectrum of analgetic and anti-i-nflammatory effects similarly to the TT-232.

The in vitro tests were performed with electric excitation of senspric neuron elements of an isolated rat trachea. The mediator of neurogenic inflammation the P-substance is released under influence of excitation from the capsaicine sensitive neuron elements and the concentration of P-substance in the water bath may be measured by radio immunoassay. Somatostatine antagonists, as well as the TT-232 hinder the excitation of tej-minal nerves so the quantity of released neuropeptide becomes less in the water bath.

The antiphlogistic efficiency of TT-232 against neurogenic and non-neurogenic inflammations was formerly tested primarily on rats (such as plasm extravasation provoked by mustard-oil, dextrane oedema, chronic arthritic oedema provoked by Freund adjuvant, plasm extravasation in articulations provoked by bradyquinine, carrageenine oedema, accumulation of leucocytes under influence of carrageenine). The oedema was provoked by alcoholic solution of capsaicine onto the mouse ear in the biological tests mentioned in the patent specification, and it was quantitatively evaluated by measurement of the mass of the ear and that of Evans's blue accumulation. The antiphlogistic effect of the TT-232 against chronic inflammation provoked by

Freund's adjuvant was demonstrated formerly on Wistar's female rat. This is the experimental model of rheumatoid arthritis. The phase II clinical trials of TT-232 on patients suffering from rheumatoid arthritis was performed in 2004. Wee took into consideration that the Freund's adjuvant aggravates symptoms implying considerable deformation of articulations on rats of Lewis strain, so the effect of

TT-232 was examined in addition to the swelling of articulation provoked by

Freund's adjuvant also to the destruction of bone to the infiltration of synovium lymphocytes and leucocytes and to the development of mechanical hyperalgesia, as well.

The following apparatuses were used in the experiments described in the patent specification.

The NMR photos were taken by apparatus Bruker AC300.

The apparatus used for measurement of HPLC was:

Waters HPLC with a detector ZMD MS and an UV one Waters 996 DAD provided with a column Supelco Discovery RP-Amide C16 wherein the gradient of acetonitrile is 10 to 100 % (of formic acid content of 0.05 %) per 6 minutes, the flowing rate is 3 ml per minute.

The melting points were measured by the apparatus Bϋchi Melting Point B-540.

The compounds according to the invention, the process for producing them and experiments to deteimine their effects are presented in the examples below. Example 1

Process for producing 2-amino-4,5-dimethyl-l-(3-chlorophenyl)-lH-pyrrolo-3- carbo itrile

18 g (0.2 moles) of acetoine and 21 ml (0.2 moles) of 3-chloroaniline were solved in 300 ml of toluene then 0.2 ml of concentrated HC1 was added. The reaction mixture was refluxed for two and half hours then evaporated to the half of volume at atmospheric pressure finally the whole solvent quantity was distilled in vacuum. The received material was solved in 350 ml of ethanol first 13.2 ml (0.2 moles) of malonic acid dinitrile was added then 11.2 g of KOH solved in 50 ml of water was dropped into it and cooled with ice. The mixture was refluxed for two hours then let to cool. The received crystalline product was filtered and washed with hexane (45.2 g; 92 %).

Example 2

Process for producing 5, 6-dimethyl-7-(3-chlorophenyl)-7H-pyrrolo[2,3- d]pyrimidine-4-ole

40 g of 2-amino-4,5-dimemyl-l-(3-cUorophenyl)--mino-3-cyano-pyrrole (Example 1) was refluxed in 200 g of formic acid for 10 hours. The mixture was then poured onto ice and stirred for 1 hour. The precipitated material was filtered out and washed with water. The product was dried at room temperature and used in the following reaction without further purification. (27 g; 60 %).

Example 3

Process for producing 5,6-dimethyl-4-chloro-7-(3-chlorophenyl)-7H-pyrrolo[2,3- -djpyrimidine

26.9 g of 4-hydroxy-5,6-dimemyl-7-((3-cUoroρhenyl)amino) ρyrrolo[2,3-

-d]pyτimidine (Example 2) was solved in 125 ml of POCI3 and the mixture was

refluxed for 1 hour, then poured onto ice-water of great excess of at least ten times greater volume, then the precipitated product was filtered off after complete decomposition of POCI3 then washed with water and dried. (26.28 g; 92 %).

Example 4

Process for producing [5-tert.-butyl-2-(3-nitro-phenyl)-2H-pyrazole-3-yl]-[7-(3- chlorophenyl)-5, 6-dimethyl- 7H-pyrrolo[2, 3-d]pyrimidine-4-yl]-amine.

0.292 g (1 millimole) of 5,6-dimethyl-4-chloro-7-((3-chlorophenyl)amino) pyτrolo[2,3-d]pyτimidine (Example 3) and 0.26 g (1 millimole) of 5-tert.~butyl-2- (3-nitro-phenyl)-2H-pyrazole-3-yl-amine (im4_3) were solved in 4 ml of dimethyl sulfoxide and 200 mg of sodium hydride was added in several portions under strong mixing then the mixture was mixed at room temperature for 1 hour. The reaction mixture was processed by pouring onto ice then the precipitated deposit was filtered off and recrystallized in the mixture of ethyl acetate and hexane (0.31 g; 60 %).

Example 5

Process for producing [7-(3-chlorophenyl)-5,6-dimethyl-7H-pyrrolo[2,3- d]pyrimidine-4-yl]-hydrazine

2.92 g (10 millimoles) of 4-chloro-7-(3-chlorophenyl)-5,6-dimethyl-7H- pyιτolo[2,3-d]pyrimidine (Example 3) was boiled together with 3 ml of hydrazine hydrate in 30 ml of ethanol for 3 hours then the solvent and the excess of hydrazine hydrate was distilled at a reduced pressure. The residue of the evaporation was separated between water and ethyl acetate. The organic phase was evaporated after drying. The residue of evaporation was bruised with ether and [7- (3-chlorophenyl)-5, 6-dimethyl- 7H-pyrrolo[2, 3-d]pyrimidine-4-yl]-hydrazine was obtained in this way (1.9 g; 66 %).

Example 6

Process for producing [7-benzyl-5,6-dimethyl-7H-pyrrolo[2,3-d]pyrimidine-4-yl]- hydrazine.

The compound was produced as described in the Example 5 with the difference that the primary substance was the known intermediate product marked as im3_l (2.71 g of the substance).

(1.92 g; 74 %)

Example 7

Process for producing 4-{[5, 6-Dimethyl-7-(3-chlorophenyl)-7H-pyrrolo[2,3-

-d]pyrimidine-4-yl]-hydrazono-methyl}-benzene-l,2-diole.

0.287 g (1 millimole) of [7-(3-chlorophenyl)-5,6-dimethyl-7H-pyrrolo[2,3-

-d]pyτimidine-4-yl]-hydrazine (Example 5) and 0.138 g (1 millimole) of 3,4- dihydroxy-benzaldehyde were boiled in 4 ml of ethanol for 6 hours and the precipitated product i. e. 4-{[7-(3-chlorophenyl)-5,6-dimethyl-7H-pyrrolo[2,3- d]pyrirmdme-4-yl]-hydrazonomethyl}-benzene-l,2-diole was filtered and washed with ether. (0.29g; 68 %).

Example 8

Process for producing 2-amino-4,5-dimethyl-l-((3-morpholine-4-yl-propyl)-lH- pyrrol-3-carbonitrile.

8.8 g (0.1 moles) of acetoine, 2-hydroxy-3-butanone and 14.4 ml (0.1 moles) of 4- (3---minopropyl) morpholine were solved in 170 ml of toluene in an apparatus containing water separator attachment then 0.1 ml of concentrated hydrochloric acid was added, the mixture was then refluxed, until it boiled at 110 C° then let to cool for a short time then 6.6 ml of malonitrile was added. The mixture was then refluxed until it boiled at 110 C° then filtered through Cellit then cooled. The precipitated crystals were filtered (17.31 g; 66 %).

Example 9

Process for producing 5, 6-Dimethyl-7-(3-morpholine-4-yl-propyl)-7H-pyrrolo[2,3-

-dJpyrimidine-4-ol.

3.761 g (14.33 millimoles) of 2-amino-4, 5 -dimethyl- 1 -(3 -morpholine-4-yl-propyl)- lH-pyrrolo-3-carbonitrile) (Example 8) was refluxed in 38 ml of formic acid for 1 night. The mixture was diluted with water during the process and neutralized with NaHC03 shaken out with ethyl acetate, then the organic phase was evaporated, the precipitated crystals were processed with hexane then filtered (3.265 g; 78.5 %). Example 10

Process for producing 5,6-dimethyl-4-chloro-7-(3-morpholirιe-4-yl-propyl)-7H- pyrrolo[2, 3-dJpyrimidine.

3 g (10.33 millimoles) of 5,6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyτrolo[2,3-d]pyτimidine-4-ole (Example 9) was refluxed in 15 ml of POC13 for an hour. The mixture was then poured onto ice, neutralized with NaHC03, shaken out

with ethyl acetate and evaporated. A brown oil was obtained (2.71 g; 85 %).

Example 11

Process for producing [5,6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyrrolo[2,3-

-d]pyrimidine-4-yl]-hydrazine .

1.785 g (5.78 millimoles) of 5,6-dimethyl-4-chloro-7-(3-morpholine-4-yl-propyl)- 7H-pyrrolo[2,3-d]pyτimidine (Example 10)was solved in so much of ethanol just enough for solution (120 ml) then 17.8 ml of hydrazine hydrate was added. The mixture was refluxed for about 15 mmutes then evaporated and separated between water and ethyl acetate. The organic phase was dried and evaporated. The crystals precipitated during evaporation were bruised with hexane then filtered (1.07 g; 61 %).

Example 12

Process for producing 4-{[5, 6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyrrolo[2,3-d]pyrimidine-4-yl]-hydrazonomethyl}-katechole.

304.4 mg (1 millimole) of [5,6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyττolo-[2,3-d]pyτimidine-4-yl]-hydrazine (Example 11) and 138.1 mg (1 millimole) of 3,4-dihydroxy-benzaldehyde were solved in 6 ml of ethanol then refluxed for half an hour. The precipitated crystals were filtered out then washed with ethanol and hexane (45 %).

Example 13

Process for producing 4-{[5, 6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyrrolo[2,3-d]pyrimidine-4-yl]hydrazonomethyl}-2-nitro-phenol.

304 mg (1 millimole) of [5,6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H-pyrrolo- [2,3-d]pyrimidine-4-yl-hydrazine (Example 11) and 169 mg (1 millimole) of 3- nitro-4-hydroxy-benzaldehyde were refluxed in 6 ml of ethanol for 4 hours then let to cool then filtered and washed in ethanol and hexane (176 mg; 36 %).

Example 14

Process for producing 4-{[5, 6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyrrolo[2,3-d]pyrimidine-4-yl]-hydrazonomethyl}-2-methoxy-phenol.

304 mg (1 millimole) of [5,6-dimethyl-7-(3-morpholine-4-yl-propyl)-7H- pyτrolo[2,3-d]pyτimidine-4-yl]-hydrazine (Example 11) with 152 mg (1 millimole) of vanillin were refluxed in 6 ml of ethanol the precipitated crystals were filtered out then washed with ethanol and hexane (221.37 mg; 50 %).

Example 15

Process for producing 4, 6-dichloro-3-{[5, 6-dϊmethyl-7-(3-morpholine-4-yl- propyl)- 7H-pyrrolo-[2, 3-d]pyrimidine-4-yl]-hydrazono}-l, 3-dihydro-indole-2-on. 108 mg (0.5 millimole) of 4,6-dichloro-isatin was added to 152.2 mg (0.5 millimole) of [5, 6-dimethyl-7-(3 -moφholine-4-yl-propyl)-7H-pyrrolo [2, 3 - d]pyrimidine-4-yl]-hydrazine (Example 11) and the mixture was refluxed in 4 ml of ethanol. The precipitated orange yellow crystals were filtered then washed with ethanol and hexane (102 mg; 40 %).

Example 16

Process for producing [5-tert.--butyl-2-(3-nitro-phenyl)-2H-pyrazole-3-yl]-[5, 6- dimethyl- 7-(3-morpholine-4-yl-propyl)- 7H-pyrrolo[2, 3-d]pyrimidine-4-yl]-amine .

650 mg (2.5 millimoles) of 5-tert.~butyl-2-(3-nitro-phenyl)-2H-pyrazole-3-yl- amine and 772 mg (2.5 millimoles) of 5,6-dimethyl-4-chloro-7-(3-morpholine-4- yl-propyl)-7H-pyrrolo[2,3-d]pyrimidine (Example 10) were solved in 4 ml of DMSO then 200 mg of NaH was added, and the mixture was stirred at room temperature for half an hour then the mixture was poured onto ice. The mixture was extracted with EtOAc dried and evaporated. The received brown oil was separated in a column, evaporated then bruised with hexane, the precipitated yellow crystals were filtered (272.2 mg; 20 %).

Examples 17 to 91

The formulas of the compoimds according to examples and the methods of production are given in the Table 2, the physical and chemical characteristics of the compounds are given in the Table 3.

Example 92

Process for producing [5-tert.--Butyl-2-(4-methoxy-phenyl)-2H-pyrazole-3-yl]- [5,6-dimethyl-7-(6-methyl-pyridine~2-yl)-7H-pyrrolo[2,3-d]pyrimidine-4-yl]- amine hydrochloride.

48 mg of the compound according to Example 91 was solved in 1 ml of anhydrous dioxane and 0.2 ml of 4M hydrochloric acid in ether was added to the mixture. The precipitated yellow deposit was filtered and washed with ether (36 mg; 70 %), melting point is 97 to 98 C°.

Table 2.

CO c

CD CO

m

CO

I m m

73 c m ro σ-

22 -(3,4-Bis-benzyloxi- C35H30CIN5O2 588.1147 -,4-dibenzyloxi- 58 enzylidene)-N'-[5,6-dimethyl-7- Denzaldehyde (3-chloro-phenyl)-7H-pyrrolo[2,3 d]pyrimidine-4-yl]-hydrazine 23 N-[5,6-dimethyl-7-(3-chloro- C21 H17CIN6Q2 420.8616 B-nitro- 72 phenyl)-7H-pyrrolo[2,3- enzaldehyde d]pyrimidine-4-yl]-N'-(3-nitro- benzylidene)- ydrazine

CO 24 4-{[5,6-dimethyl-7-(3-chloro- 22H20CIN5O2 421.89 4-hydroxy-3- 35 c

CD phenyl)-7H-pyrrolo[2,3- methoxy- CO d]pyrimidine-4-yl]- benzaldehyde tιydrazonomethyl}-2-methoxy- phenol m 25 N-(7-benzyl-5,6-dimethyl-7H- C26H23N5 405.5067 haphtyl-1- 58 co pyrrolo[2,3-d]pyrimidine-4-yl)-N'- carbaldehyde

X m naftalen-1-ylmethyIene-hydrazine m a- 26 N-(7-benzyI-5,6-dimethyI-7H- P23H20F3N5 423.4446 W-trifluoromethyl- 81 c pyrrolo[2,3-d]pyrimidine-4-yl)-N'- benzaldehyde m (4-trifIuoromethyl-benzylidene)- ro σ- ydrazine 27 -(7-benzyl-5,6-dimethyI-7H- C20H19N5S 361.4719 thiopheue-2- SI yrrolo[2,3-d]pyrimidine-4-yl)-N'- arbaldehyde hiophene-2-yl-methylene- hydrazine 28 4-[(7-benzyl-5,6-dimethyI-7H- C22H20N6O3 416.4431 4-hydroxy-3-nitrθ' 95 pyrrolo[2,3-d]pyrimidine-4-yI)- benzaldehyde hydrazonomethyI]-2-n.tro-phenol

29 ]4-[(7-benzyl-5,6-dimethyl-7H- 24H25N50 399.4998 3,5-dimethyl-4- 91 Dyrrolo[2,3-d]pyrimidine-4-yl)- hydroxy- .ydrazonomethyl]-2,6-dimethyI- benzaldehyde ahenol 30 -(7-benzyl-5,6-dimethyl-7H- C36H33N502 567.6967 3,4-dibenzyloxy- 67 pyrrolo[2,3-d]pyrimidine-4-yl)-N'- benzaldehyde (3,4-bis-benzyloxi-benzyIidene)- hydrazine 31 {4-[(7-benzyl-5,6-dimethyl-7H- C24H26N6 398.515 W-dimethylamino- 21 pyrrolo[2,3-d]pyrimidine-4-yl)- enzaldehyde

CO tιydrazonomethyl]-phenyI}- c dimethyl-amine

CD CO 32 -(7-benzyl-5,6-dimethyl-7H- C22H20N6O2 400.4437 β-nitro- 25 pyrrolo[2,3-d]pyrimidine-4-yI)-N'- benzaldehyde (3-nitro-benzyli ene)-hydrazine m co ro-

X 33 4-[(7-benzyl-5,6-dimethyl-7H- C23H23N502 401.4721 4-hydroxy-3- 20 m m pyrrolo[2,3-d]ρyrimidine-4-yl)- methoxy- -ιydrazonomethylJ-2-methoxy- benzaldehyde a- phenol c 34 N-(7-benzyl-5,6-dimethyi-7H- C25H27N5 m 397.5274 4-isopropyl- 58 ro pyrro I o[2 , 3-d]pyrimidine-4-yl)-N'- benzaldehyde σ- (4-izopropyl-benzylidene)- hydrazine 35 tt-[(7-benzyl-5,6-dimethyl-7H- C23H20N6 380.4561 w-cyano- 69 pyrrolo[2,3-d]pyrimidine-4-yl)- benzaldehyde nydrazonometnyl]-benzoni rile

36 4-{[5,6-dimethyl-7-(3-chloro- C23H22CIN50 419.9177 3,5-dimethyl-4- 47 phenyl)-7H-pyrrolo[2,3- hydroxy- ^•d]pyrimidine-4-yl]- benzaldehyde hydrazonomethyl}-2,6-dimethyl- phenol

c ro w

m at x m m 7 c0 r m t

69 1-benzyl-2-(9-benzyl-6,7,8,9- 33H32N6 512.6632 m2 2 έs im3 2 48 tetrahidro-5H-1 ,3,9-triaza- f!uorene-4-yl-amino)-4,5,6,7- -etrahidro-1H-indole-3-carbonitriIe 70 1-benzyl-2-(9-benzyl-6,7,8,9- C41 H34N6 610.7683 m2 3 es im3 3 55 tetrahidro-5H-1 ,3,9-triaza- fluorene-4-yl-amino)-4,5-diphenyl- 1 H-pyrrol-3-carbonitrile 71 1-benzyl-2-(9-benzyl-6,7,8,9- C31H30N6 486.625 im2 1 έs im3 2 81 tetrahidro-5H-1 ,3,9-triaza- fluorene-4-yl-amino)-4,5-dimethyl- 1 H-pyrrol-3-carbonitrile

CO 72 2-(7-benzyl-5,6-dimethyl-7H- 28H25CIN6 481.0047 im2 4 έs im3 1 91 c pyrrolo[2,3-d]pyrimidine-4- ro co yl-amino)-1-(3-chloro-phenyi)- 4,5-dimethyl-l H-pyrrol-3- V. carbonitrile o m 73 1-benzyl-2-(7-benzyl-5,6-dimethyl- 31H30N6 486.625 Sm2 2 έs im3 1 67 co 7H-pyrroIo[2,3-d]pyrimidin-4- x ylamineo)-4,5,6,7-tetrahydro-1H- m m Sndole-3-carbonitriIe

H 74 1-benzyl-2-(7-benzyl-5,6-dimethyl C39H32N6 584.7301 im2 3 es im3 1 81

*J

C 7H-pyrrolo[2,3-d]pyrimidine-4-yl- m amino)-4,5-diphenyl-1 H-pyrrol-3- ro carbonitπ^'le 75 benzyl-2-(7-benzyl-5,6-dimethyl-|C29H28N6 460.5867 m2 1 έs im3 1 49 7H-pyrrolo[2,3-d]pyrimidine-4-yl- amino)-4,5-dimethyl-1H-pyrrol-3- carbonitrile

Table 3. Physical-chemical characters

Example 93. (Study of pharmaceutical effect)

Examination of active substances inhibiting release of substance P (SP) by radio immuno-assay (RIA) method in vitro on rat trachea

The influence of active substances on the SP release (of 500 nanomoles) was examined in in vitro environment on rat trachea in biological bath (Wistar's rats of 200 to 250 g weight were used). Samples were taken three times in periods of 8 minutes after perfusion with oxygenated Krebs's solution for 1 hour. The organ was excited with electric current of 10 Hz, 40 V, 0.1 ms, 120 s in the middle period of 8 minutes. The SP content of the samples were measured by a specific radio immuno-assay method. The values are represented in the diagram in the following way; the value before electric excitation with empty column, the one measured immediately after excitation with black and the one measured at 8 minutes after excitation with shaded columns. The following radio immuno-assay method was

used: 5000 cpm of mono-iodized SP marked with 1125 iodine isotope was used as RIA tracer. Synthetic SP was used as standard in the concentration range of 0 to 100 phento moles per ml. The neuropeptide concentrations related to the weight of humid tissues of the samples were expressed in units "phento moles per mg". The Figure 8 shows the inhibiting effect of TT-232 as reference substance and 8 compounds in concentration of 500 nM to the release of P-substance under electric excitation (see the black columns). The significant values related to the control ones received on prepared organs treated only with solvent are shown.

Example 94. (Study of pharmaceutical effect) Examination of the in vivo neurogenic inflammation inhibiting effect.

(Swelling and plasm protein extravasation provoked by capsaicine in the mouse ear).

BALB/c male mice of 18 to 20 g were anesthetized with ketamine (100 mg/kg according to the invention) and xylazine (10 mg/kg i. m.). Having measured the ear thickness at the base the examined substances were applied according to the invention in quantities of 0. 1 ml per 10 g. 10 minutes later Evans blue stain of 125 mg per kg (solution of 2.5 %, 0.05 ml per 10 g) was injected into tail veins then 5 minutes later 10 μl of alcohol of 96 % was applied on the left ear and 10 μl of capsaicine solution of 2.5 % was applied on the right ear of each animal. The Evans blue marker stain connects itself to the plasma albumin in the circulation. The surfaces become blue where the plasma albumin leaves blood vessels because of inflammation. The thickness of ears was measured again after 30 minutes and the swelling was defined as per cents of the initial thickness. The animals were killed thereafter by bleeding to death, their ears were cut and the mass of the ears was measured. The stain accumulated in the tissue pieces was extracted with 1.5 ml of formamide at 20 C° for 72 hours. The optical densities of the solutions were determined by spectrophotometry (with microplate reader) at the wavelength of 620 nm. The quantity of extravased stain (indicating the plasma albumin quantity) was defined in units of mg per humid tissue The values measured in the ears treated in alcohol were subtracted from the ones measured in the ears treated with capsaicine at both animals. The animals treated with solvent served as control. The Figure 9 shows accumulation of Evans blue quantity in the control group pre- treated with solvent (black column) after administering TT-232 as reference substance and dosing of 100 μg/kg of 11 compounds according to the invention. Non-parametric Mann- Whitney test was used to the statistical evaluation of the results. *p < 0.05; **p < 0.01.

Example 95. (Study of pharmaceutical effect)

Examination of vasodilatation and extravasation of plasma protein in mouse's ear provoked by mustard oil.

Balb/c male mice were anesthetized with ketamine (100 mg/kg according to the invention) and xylazine (5 mg/kg i. m.) then albumin (30 kBq activity per mouse)

marked with 0.1 ml of iodine isotope 1 5 _was dosed i. v. 10 μl of mustard oil ofl % was dribbled onto both sides of the left ear of each mouse and smeared. The radioactivity was measured in each minute for 50 minutes with gamma ray counter above the ear. The increase of activity indicates vasodilatation and extravasation of the plasma protein. 20 μg/kg of TT-232 and non peptide following molecule 1 1527

(10 and 100 μg/kg) were dosed according to the invention 30 minutes before the treatment with mustard oil. A solvent was used in the control group.

Bonferroni's modified test after ANOVA was used for statistical evaluation, *p < 0.05, **p < 0.01; n=7 per group (see Figure 10 )„

Example 96. (Study of pharmaceutical effect)

Examination of neuropathic hyperalgesia

The partial unilateral ligation of n. ishiadicus causes diminution of the mechanonociceptive threshold of the extremity (Seltzer's operation). The mechanonociception was examined with Ugo Basile's analgesimeter (Randall- Selitto test). The foot of the animal was put under a teflon cone with rounded end and gradually increasing force was exerted onto middle region of the beck of foot. The pain threshold is the value when the animal pulls its leg out. It may be read out in grams by the hand moving before linear scale. The change of the mechanical threshold was expressed in per cents of the own initial threshold. The nervus ischiadus of the thigh of male Sprague-Dawley rats was prepared on the one side in pentobarbital narcosis after control measurements then 1/3 to 1/2 part of the nerves were carefully detached, tightly bound with non-traumatic thread

(Mersilene, Ethicon) of 6/0 size, then the incision was closed. The

mechanonociceptive thresholds were measured again on the 7 day after the operation. Only the animals were involved in the following examination, which showed reduction of thresholds of at least 20 % related to the control results. The measurements were repeated 20 minutes after dosing of 18 according to invention. The results were expressed in per cents related to the initial values measured 1 before dosing (shown by white column) and compared to the control group with solvent. Non-parametric Mann- Whitney tests were used to determine statistically i significant differences. *p < 0.05, **p < 0.1, n = 6 to 8 per group (see Figure !n ) .

Claims

1 7H-pyιτolo[2,3-d]pyrimidine derivatives of the general formula (I), as well as their pharmaceutically acceptable salts ch aracterize d by that in the formula

RI is alkyl, aryl, heteroaryl, aryl-alkyl with 1-4 carbon atoms, heteroaryl-alkyl with 1-4 carbon atoms, morpholino-alkyl with 1-4 carbon atoms or dialkylamino-alkyl with 1-4 carbon atoms,

R2, R3 independently of each other are hydrogen, methyl, ethyl, propyl, isopropyl or cyclopropyl groups or R2 and R3 are together a tetramethylene group

R4 is

// -R5 — N or

or

group, wherein R5 is a substituted or unsubstituted aromatic or heteroaromatic ring where R6, R7, R8 and R9 independently of each other are hydrogen, halogen, nitro, amino, alkylamino, dialkylamino, hydroxy, methoxy, ethoxy, isopropoxy or sulfonyl group, RIO is hydrogen or nitrile group, RI 1 is hydrogen, methyl, ethyl, propyl, isopropyl, tert. -butyl group or tetramethylene ring connected to X, R12 is alkyl, aryl, heteroaryl, aryl-alkyl with 1-4 carbon atoms, morpholino-alkyl with 1-4 carbon atoms, dialkylamino-alkyl with 1-4 carbon atoms, X is carbon, if Rl l is a tetramethylene ring connected to X, otherwise nitrogen, methine, memyl-methine, ethyl-methine, propyl-methine, isopropyl-methine, cyclopropyl-methine, tert.- butyl-methine or phenyl-methine.

2 The compounds of general formula (I) according to Claim 1 c h ara c t eri z e d by that their structures correspond to the general formula (la) wherein RI, R2, R3, RIO, RI 1, R12 and X are the same as in the Claim 1.

3 The compounds of general formula (I) according to Claim 1 characterize d by that their structures correspond to the general formula (lb) wherein RI, R2, R3 and R5 are the same as in the Claim 1.

4 The compounds of general formula (I) according to Claim 1 characteriz e d by that their structures correspond to the general formula (Ic) wherein RI, R2, R3, R6, R7, R8 and R9 are the same as in the Claim 1.

5 Pharmaceutical preparations characterize d by that they contain compounds of general formula (I) and therapeutically acceptable additives.

6 Pharmaceutical preparations according to Claim 5 characterize d by that they might be applied as antiphlogistic or analgetic medicament.

7 Pharmaceutical preparations according to Claim 5 characteri ze d by that they might be applied as neuropathic hyperalgesia reducing medicament.

8 Pharmaceutical preparations according to Claim 5 ch aracteri z e d by that they might be applied as rheumatic arthritis reducing medicaments.

9 Pharmaceutical preparations according to Claim 5 characterize d by that they might be applied as medicament hindering destruction of bones or chondrus.

10 Pharmaceutical preparations according to Claim 5 characteri ze d by that they might be applied for treatment of diseases, which may be connected with inflammatory processes e. g. asthma, eczema or psoriasis.

11 Process for producing 7H-pyrrolo[2,3-d]pyrimidine derivatives of the general formula (I) characterize d by that a compound of general formula (II) produced from acetoin with amine and malonic acid dinitrile of molar equivalent quantities where RI, R2 and R3 are the same as mentioned in the formula (I),the compound is mixed with formic acid of mass excess of 5 to 10 times at reflux temperature for a time period of 1 hour to 2 days, then the mixture is poured into ice-water, the precipitated product is separated, the product is dried then brought into reaction with phosphorus oxychloride of mass excess of 5 to 10 times at reflux temperature for 0.5 to 4 hours then the mixture is poured onto ice and the precipitated imidoyl-chloride of general formula (III) where RI, R2 and R3 are the same as mentioned in the formula (I) is separated, dried and evaporated, thereafter

A) the imidoyl chloride of general formula (III) is solved in an aprotic solvent and brought into reaction with amine of general formula (II) or (IV) of equivalent quantity where RI and R3 are the same as above adding NaH of 2 to 10 times of molar equivalent excess for 0.5 to 6 hours, the produced mixture is poured onto ice and the precipitated product is separated and purified, or

B) the imidoyl chloride of general formula (III) produced in this way is brought into reaction with hydrazine hydrate of molar equivalent excess of 2 to 10 times in a medium of polar organic solvent, the reaction product in the organic phase is separated from the mixture, the organic phase is dried and evaporated then bruised with an apolar solvent, the hydrazine derivative produced in this way is mixed with a polar organic solvent and brought into reaction with an aldehyd of equivalent quantity at 20 to 120 C° for 1 to 12 hours, then the reaction product is separated, or C) the hydrazine derivative produced according to version B) is mixed with a polar organic solvent and brought into reaction with isatin of equivalent quantity then the product of reaction is separated.