AU2004202678A1

AU2004202678A1 - 2-ureido-thiazole derivatives, process for their preparation, and their use as antitumor agents

Info

Publication number: AU2004202678A1
Application number: AU2004202678A
Authority: AU
Inventors: Raffaella Amici; Antonella Isacchi; Paolo Pevarello; Gabriella Traquandi; Manuela Villa; Anna Vulpetti
Original assignee: Pharmacia and Upjohn SpA
Current assignee: Pfizer Italia SRL
Priority date: 1998-10-30
Filing date: 2004-06-18
Publication date: 2004-07-15

Description

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant: PHARMACIA UPJOHN S.P.A.

Invention Title: 2-UREIDO-THIAZOLE DERIVATIVES, PROCESS FOR THEIR PREPARATION, AND THEIR USE AS ANTITUMOR AGENTS The following statement is a full description of this invention, including the best method of performing it known to us: 2-UREIDO-THIAZOLE DERIVATIVES, PROCESS FOR THEIR PREPARATION, AND THEIR USE AS ANTITUMOR

AGENTS

The present invention relates to 2 -ureido-thiazole derivatives and, more in particular, it relates to 2ureido-l,3-thiazoles, to a process for their preparation, to pharmaceutical compositions containing them and to their use as therapeutic agents, particularly in the treatment of cancer and cell proliferative disorders.

Several cytotoxic drugs such as, e.g. fluorouracil doxorubicin and camptothecins result to damage DNA or to affect cellular metabolic pathways and thus cause, in many cases, an indirect block of the cell cycle.

Therefore, by producing an irreversible damage to both normal and tumor cells, these agents result in a significant toxicity and side-effects.

In this respect, compounds capable of being highly specific antitumor agents by selectively leading to tumor cell arrest and apoptosis, with comparable efficacy but reduced toxicity than the currently available drugs, are desirable.

It is well known in the art that progression through the cell cycle is governed by a series of checkpoint controls, otherwise referred to as restriction points, which are regulated by a family of enzymes known as the cyclindependent kinases (cdk).

In their turn, the cdks themselves are regulated at many levels such as, for instance, binding to cyclins.

A normal progression through the cell cycle is controlled by the coordinated activation and inactivation of different cyclin/cdk complexes. In Gl, both cyclin D/cdk4 and cyclin E/cdk2 are thought to mediate the onset of S-phase.

Progression through S-phase requires the activity of cyclin A/cdk2 whereas the activation of cyclin A/cdc2 (cdkl) and cyclin B/cdc2 are required for the onset of metaphases.

-2- For a general reference to cyclins and cyclin-dependent kinases see, for instance, Kevin R. Webster et al. in Exp.

Opin. Invest. Drugs, 1998, Vol. 865-887.

Checkpoint controls are defective in tumor cells due, in part, to disregulation of cdk activity. For example, altered expression of cyclin E and cdk's has been observed in tumor cells, and deletion of the cdk inhibitor p27 KIP gene in mice has been shown to result in a higher incidence of cancer.

Increasing evidence supports the idea that the cdks are rate-limiting enzymes in cell cycle progression and, as such, represent molecular targets for therapeutic intervention. In particular, the direct inhibition of cdk/cyclin kinase activity should be helpful in restricting the unregulated proliferation of a tumor cell.

It has now been found that the 2 -ureido-l,3-thiazoles of the invention are endowed with cdk/cyclin kinase inhibitory activity and are thus useful in therapy as antitumor agents whilst lacking, in terms of both toxicity and side effects, the aforementioned drawbacks known for currently available antitumor drugs.

More specifically, the compounds of this invention are useful in the treatment of a variety of cancers including, but not limited to: carcinoma such as bladder, breast, colon, kidney, liver, lung, including small cell lung cancer, esophagus, gall-bladder, ovary, pancreas, stomach, cervix, thyroid, prostate, and skin, including squamous cell carcinoma; hematopoietic tumors of lymphoid lineage, including leukemia, acute lymphocitic leukemia, acute lymphoblastic leukemia, B-cell lymphoma, T-cell-lymphoma, Hodgkin's lymphoma, non-Hodgkin's lymphoma, hairy cell lymphoma and Burkett's lymphoma; hematopoietic tumors of myeloid lineage, including acute and chronic myelogenous leukemias, myelodysplastic syndrome and promyelocytic leukemia; tumors of mesenchymal origin, including fibrosarcoma and rhabdomyosarcoma; tumors of the central and peripheral nervous system, including astrocytoma neuroblastoma, glioma and schwannomas; other tumors, including melanoma seminoma, teratocarcinoma osteosarcoma, xenoderoma pigmentosum, keratoctanthoma thyroid follicular cancer and Kaposi's sarcoma.

Due to the key role of cdks in the regulation of cellular proliferation, these 2 -ureido-1,3-thiazole derivatives are also useful in the treatment of a variety of cell -proliferative disorders such as, for instance, benign prostate hyperplasia, familial adenomatosis, polyposis neuro-fibromatosis, psoriasis, vascular smooth cell proliferation associated with atherosclerosis, Pulmonary fibrosis, arthritis, glomerulonephritis and post-surgical stenosis and restenosis.

The compounds of the invention can be useful in the treatment of Alzheimer's disease, as suggested by the fact that cdk5 is involved in the phosphorylation of tau protein (J.Biochem., 117, 741-749, 1995).

The compounds of this invention, as modulators of apoptosis, could be useful in the treatment of cancer, viral infections, prevention of AIDS development in HIVinfected individuals, autoimmune diseases and neurodegenerative disorder.

The compounds of this invention could be useful in inhibiting tumor angiogenesis and metastasis.

The compounds of this invention may also act as inhibitors of other protein kinases, e.g. protein kinase C, her2, rafl, MEK1, MAP kinase, EGF receptor, PDGF receptor,

IGF

receptor, PI3 kinase, weel kinase, Src, Abl and thus be effective in the treatment of diseases associated with other protein kinases.

Several 2 -ureido-l,3-thiazole derivatives are known in the art, particularly as herbicides or as synthetic intermediates for preparing herbicides [see, for a general reference, US 3,726,891 in the name of Shell Co., and C.A.

83(1975):114381].

Just few examples among them are N'-methyl- and N'-ethyl-N- (5-bromo-2-thiazolyl)-urea; N'-methyl-, N'-ethyl- or N'phenyl-N-(5-chloro-2-thiazolyl)-urea; N-(5-chloro-2thiazolyl)-N',N'-dimethyl-urea; N-(5-bromo-2-thiazolyl)- N',N'-dimethyl-urea; N'-methyl- and 2-thiazolyl)-urea.

Other 2-ureido-1,3-thiazole derivatives have been described in the art as therapeutic agents.

Among them are N-methyl- and N-phenyl-N'-(5-chloro-2thiazolyl)-urea which have been described as sedative and antiinflammatory agents in FR M. 7428 (Melle-bezons) or N- [4-(5-oxazolyl)phenyl]-N'-(5-methyl-2-thiazolyl)-urea, described as inosine 5'-monophosphate dehydrogenase inhibitor (IMPDH) in WO 97/40028 (Vertex Pharmaceuticals Inc.).

Accordingly, the present invention provides the use of a compound which is a 2-ureido-1,3-thiazole derivatives of formula (I) H I H2 wherein R is a halogen atom, a nitro group, an optionally substituted amino group or it is a group, optionally further substituted, selected from: i) straight or branched alkyl; ii) C 3 -C cycloalkyl; iii) aryl or arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R, is an optionally further substituted group selected from: i) straight or branched Ci-C, alkyl; ii) 3 to 6 membered carbocycle or 5 to 7 membered heterocycle ring; iii) aryl or arylcarbonyl; iv) arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain;

R

2 is hydrogen, a straight or branched C alkyl or C2-C alkenyl or alkynyl group; or, taken together with the nitrogen atom to which they are bonded, R, and R, form a substituted or unsubstituted group selected from: i) an optionally benzocondensed or bridged 5 to 7 membered heterocycle; or ii) a 9 to 11 membered spiro-heterocyclic compound; or a pharmaceutically acceptable salt thereof; in the manufacture of a medicament for treating cell proliferative disorders associated with an altered cell dependent kinase activity.

According to a preferred embodiment of the invention, the said cell proliferative disorder is selected from the group consisting of cancer, Alzheimer's disease, viral infections, auto-immune diseases or neurodegenerative disorders.

Preferably, the cancer is selected from the group consisting of carcinoma, squamous cell carcinoma, hematopoietic tumors of myeloid or lymphoid lineage, tumors of mesenchymal origin, tumors of the central and peripheral nervous system, melanoma, seminoma, teratocarcinoma, osteosarcoma, xenoderoma pigmentosum, keratoctanthoma, thyroid follicular cancer and Kaposi's sarcoma.

According to another preferred embodiment of the invention, the cell proliferative disorder is selected from the group consisting of benign prostate hyperplasia, familial adenomatosis polyposis, neuro-fibromatosis, psoriasis, vascular smooth cell proliferation associated with atherosclerosis, pulmonary fibrosis, arthritis -6glomerulonephritis and post-surgical stenosis and restenosis.

In addition, being useful in the treatment of cell proliferative disorders associated with an altered cell dependent kinase activity, hence cell cycle inhibition or cdk/cyclin dependent inhibition, the compounds of formula of the invention also enable tumor angiogenesis and metastasis inhibition.

As above reported, some of the compounds of formula of the invention have been reported in the art as useful therapeutic agents, for instance as antiinflammatory, sedative and analgesic agents.

Therefore, it is a further object of the present invention a compound which is a 2-ureido-1,3-thiazole derivative of formula (I) R ANR 1 H I wherein R is a halogen atom, a nitro group, an optionally substituted amino group or it is a group, optionally further substituted, selected from: i) straight or branched Cl-C, alkyl; ii) C3-C, cycloalkyl; iii) aryl or arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R1 is an optionally further substituted group selected from: i) straight or branched C 1

-C

6 alkyl; ii) 3 to 6 membered carbocycle or 5 to 7 membered heterocycle ring; iii) aryl or arylcarbonyl; -7iv) arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R is hydrogen, a straight or branched C -C alkyl or C,-C, alkenyl or alkynyl group; or, taken together with the nitrogen atom to which they are bonded, RI and R 2 form a substituted or unsubstituted group selected from: i) an optionally benzocondensed or bridged 5 to 7 membered heterocycle; or ii) a 9 to 11 membered spiro-heterocyclic compound; or a pharmaceutically acceptable salt thereof; for use as a medicament; provided that: a) when R is a chlorine atom and R 2 is hydrogen, then R i is not methyl, phenyl or trifluoromethylphenyl; and b) when R is methyl and R, is hydrogen, then R, is not oxazolyl)phenyl.

Among the compounds of formula above reported, several derivatives result to be novel.

Therefore, the present invention further provides a compound which is a 2-amino-l,3-thiazole derivative of formula (I) H I H2 wherein R is a halogen atom, a nitro group, an optionally substituted amino group or it is a group, optionally further substituted, selected from: i) straight or branched C 1 alkyl; iii) C,-C 6 cycloalkyl; iv) aryl or arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R, is an optionally further substituted group selected from: -8i) straight or branched C 1

-C

6 alkyl; ii) 3 to 6 membered carbocycle or 5 to 7 membered heterocycle ring; iii) aryl or arylcarbonyl; iv) arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain;

R

2 is hydrogen, a straight or branched C alkyl or C 2

-C

alkenyl or alkynyl group; or, taken together with the nitrogen atom to which they are bonded, R, and R, form a substituted or unsubstituted group selected from: i) an optionally benzocondensed or bridged 5 to 7 membered heterocycle; or ii) a 9 to 11 membered spiro-heterocyclic compound; or a pharmaceutically acceptable salt thereof; provided that: a) when R is chlorine or bromine and R 2 is hydrogen, then RI is not unsubstituted

C

1

-C

3 alkyl, phenyl, trifluoromethylphenyl or an optionally substituted phenylcarbonyl; b) when R is methyl and R, is hydrogen, then R, is not methyl, phenyl or 4 c) when R is nitrophenyl and R 2 is hydrogen, then R. is not haloalkyl; d) when R is bromine or chlorine, then R, and R 2 are not both methyl groups.

The compounds of formula may have asymmetric carbon atoms and may therefore exist either as racemic admixtures or as individual optical isomers.

Accordingly, all the possible isomers and their admixtures and of both the metabolites and the pharmaceutically acceptable bio-precursors (otherwise referred to as prodrugs) of the compounds of formula as well as the uses thereof, are also within the scope of the present invention.

-9- In the present description, unless otherwise specified, with the term halogen atom we intend a chlorine, bromine, fluorine or iodine atom.

With the term optionally substituted amino group we intend an amino group wherein one or both hydrogen atoms are optionally replaced by other substituents which are the same or different, as set forth below.

With the term straight or branched C6-C, alkyl we intend a group such as, for instance, methyl, ethyl, n.propyl, isopropyl, n.butyl, isobutyl, sec-butyl, tert-butyl, n.pentyl, n.hexyl and the like.

With the term straight or branched alkenyl or alkynyl group we intend a group such as, for instance, vinyl, allyl, isopropenyl, 2- or 3-butenyl, isobutylenyl, ethynyl, 1- or 2 -propynyl, butynyl and the like.

With the term C 3 cycloalkyl we intend a cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl group.

With the term aryl, either as such or as arylalkyl, arylcarbonyl and the like, we intend a mono-, bi- or polyeither carbocyclic as well as heterocyclic hydrocarbon with from 1 to 4 ring moieties, either fused or linked to each other by single bonds, wherein at least one of the carbocyclic or heterocyclic rings is aromatic.

Examples of aryl groups are phenyl, biphenyl, a- or naphthyl, tetrahydronaphthyl, indenyl, dihydroindenyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl, isoindolyl, dihydroisoindolyl, imidazolyl, imidazopyridyl, benzimidazolyl, dihydrobenzimidazolyl, 1,2methylenedioxyphenyl, thiazolyl, isothiazolyl, benzothiazolyl, pyrrolyl, pyrazolyl, furyl, benzotetrahydrofuranyl, benzofuranyl, dihydrobenzofuranyl, oxazolyl, isoxazolyl, thienyl, benzothienyl, tetrazolyl, 10 quinolinyl, isoquinolinyl, dihydroisoquinolinyl, quinoxalinyl, dihydroquinoxalinyl, oxadiazolyl, tetrahydrobenzodiazepin-yl and the like.

With the term 3 to 6 membered carbocycle, hence encompassing but not limited to C3-C 6 cycloalkyl groups, we also intend an unsaturated carbocyclic hydrocarbon such as, for instance, cyclopentylene or cyclohexylene.

With the term 5 to 7 membered heterocycle, hence encompassing aromatic heterocycles also referred to as aryl groups, we further intend a saturated or partially unsaturated 5 to 7 membered carbocycle wherein one or more carbon atoms are replaced by heteroatoms such as nitrogen, oxygen and sulphur.

Examples of 5 to 7 membered heterocycles, optionally benzocondensed or further substituted, are 1, 3 -dioxolane, pyran, pyrrolidine, pyrroline, imidazolidine, pyrazolidine, pyrazoline, piperidine, piperazine, N-alkyl-piperazine, morpholine, tetrahydrofuran, and the like.

With the term bridged heterocycles we intend a system at least comprising two rings, one of which being a nitrogen containing heterocycle, having two or more atoms in common such as, for instance, azabicyclo[3.2.2]nonane.

With the term 9 to 11 membered spiro heterocycle we intend a system at least comprising two rings, one of which being a nitrogen containing heterocycle, having one carbon atom in common such as, for instance, 1,4-dioxa-8and 1, 3 ,8-triazaspiro[4.5]decane.

According to the above indicated substituent meanings, any of the above R, R 1 and R 2 groups may be optionally substituted in any of the free positions by one or more groups, for instance 1 to 6 groups, selected from: halogen, nitro, oxo groups carboxy, cyano, alkyl, perfluorinated alkyl, alkenyl, alkynyl, cycloalkyl, aryl,

SI

11 heterocyclyl, amino groups and derivatives thereof such as, for instance, alkylamino, alkoxycarbonylalkylamino, dialkylamino, arylamino, diarylamino, alkylsulfonylamino or arylureido; carbonylamino groups and derivatives thereof such as, for instance, formylamino, alkylcarbonylamino, alkenylcarbonylamino, arylcarbonylamino, alkoxycarbonylamino; oxygen-substituted oximes such as, for instance, alkoxycarbonylalkoxyimino or alkoxyimino; hydroxy groups and derivatives thereof such as, for instance, alkoxy, aryloxy, alkylcarbonyloxy, arylcarbonyloxy, cycloalkenyloxy; carbonyl groups and derivatives thereof such as, for instance, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, aryloxycarbonyl, cycloalkyloxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl; sulfurated derivatives such as, for instance, alkylthio, arylthio, alkylsulphonyl, arylsulphonyl, alkylsulphinyl, arylsulphinyl, arylsulphonyloxy, aminosulfonyl, alkylaminosulphonyl or dialkylaminosulphonyl. In their turn, whenever appropriate, each of the above possible substituents on R, R, and R, may be further substituted by one or more of the aforementioned groups.

Examples of compounds of formula wherein R, R, and R 2 groups are substituted by one or more of the aforementioned substituents which, in their turn, are optionally further substituted as set forth above, are given below.

Pharmaceutically acceptable salts of the compounds of formula are the acid addition salts with inorganic or organic, e.g. nitric, hydrochloric, hydrobromic, sulphuric, perchloric, phosphoric, acetic, trifluoroacetic, propionic, glycolic, lactic, oxalic, malonic, malic, maleic, tartaric, citric, benzoic, cinnamic, mandelic, methanesulphonic, isethionic and salicylic acid, as well as the salts with inorganic or organic bases, e.g. alkali or alkaline-earth metals, especially sodium, potassium, calcium or magnesium hydroxides, carbonates or bicarbonates, acyclic or cyclic amines, preferably methylamine, ethylamine, diethylamine, triethylamine or piperidine.

-12- The compounds of formula may have asymmetric carbon atoms and may therefore exist either as racemic admixtures or as individual optical isomers.

Accordingly, the use as an antitumor agent of all the possible isomers and their admixtures and of both the metabolites and the pharmaceutically acceptable bioprecursors (otherwise referred to as pro-drugs) of the compounds of formula are also within the scope of the present invention.

Preferred compounds of the invention are the compounds of formula wherein R is a halogen atom, a straight or branched C,-C alkyl group, a phenyl or a cycloalkyl group;

R

2 is hydrogen and R, is an optionally substituted group selected from alkyl, aryl or arylakyl.

Even more preferred, within this class, are the compounds of formula wherein R is bromine or chlorine, a straight or branched CI-C, alkyl group, a phenyl or a cycloalkyl group; R, is hydrogen and R, is an optionally substituted aryl or an arylalkyl or heterocyclyl-alkyl group with from 1 to 4 carbon atoms within the alkyl chain.

Another class of preferred compounds of the invention are the compounds of formula (I) H I wherein R is a halogen atom or is selected from the group consisting of nitro, amino, alkylamino, hydroxyalkylamino, arylamino, C 3

-C

6 cycloalkyl, straight or branched C.-CG alkyl optionally substituted by hydroxy, alkylthio, alkoxy, amino, alkylamino, alkoxycarbonylalkylamino, alkylcarbonyl, alkylsulfonyl, alkoxycarbonyl, carboxy, aryl optionally substituted -13by one or more hydroxy, halogen, nitro, alkoxy, aryloxy, alkylthio, arylthio, amino, alkylamino, dialkylamino, N-alkyl-piperazinyl, 4-morpholinyl, arylamino, cyano, alkyl, phenyl, aminosulfonyl, aminocarbonyl, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl or carboxy, or R is an aryl group optionally substituted by one or more hydroxy, halogen, nitro, alkoxy, aryloxy, alkylthio, arylthio, amino, alkylamino, dialkylamino, N-alkyl-piperazinyl, 4morpholinyl, arylamino, cyano, alkyl, phenyl, aminosulphonyl, aminocarbonyl, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl or carboxy;

R

i is a straight or branched C,-C 6 alkyl group or an aryl group, each optionally substituted as above reported for R; R is a hydrogen atom; and pharmaceutically acceptable salts thereof; provided that: a) when R is chlorine or bromine then R, is not unsubstituted

C--C

3 alkyl, phenyl, trifluoromethylphenyl or an optionally substituted phenylcarbonyl; b) when R is methyl then R, is not methyl, phenyl or oxazolyl)phenyl; c) when R is nitrophenyl then R, is not haloalkyl.

Another class of preferred compounds of formula are those wherein R is a straight or branched CI-C 6 alkyl group and, together with the nitrogen atom to which they are bonded, R, and R 2 form a substituted or unsubstituted, optionally either benzocondensed or bridged 5 to 7 membered heterocycle, or 9 to 11 membered spiro-heterocycle.

Still another class of preferred compounds of formula (I) are those wherein R is a straight or branched C 1

-C

6 alkyl group; R, is a straight or branched alkyl or C2-C alkenyl or alkynyl group and R, is an aryl or arylalkyl group with from 1 to 4 carbon atoms within the straight or branched alkyl chain.

-14- Examples of preferred compounds of the invention, whenever appropriate in the form of pharmaceutically acceptable salts, e.g. hydrobromide or hydrochloride salt, are the following: 1) N- (5-isopropyl-1, 3-thiazol-2-yl) -N'-phenyl-urea; 2) N- (5-bromo-1, 3-thiazol-2-yl) -N'phenylpurea; 3) N- (5-phenyl-l, 3-thiazol-2-yl) -N'-phenyl-urea; 4) N- (5-cyclopropyl-1, 3-thiazol-2-yl) N'-pheny..urea; 5) N- (5-broro-, 3-thiazol-2.yl)N-(4-sulf amoyl-phenyl) urea; 6) N- (5-isopropyl-1, 3-thiazol-2.yl) -N'-(4..sulfamoyl-phenyl) urea; 7) N- (5-phenyl-1, 3-thiazol2yl)-N'-(4-sulfamoyl-phenyl) urea; 8) N- (5-cyclopropyl-1, 3-thiazo1.>-yl)-N'- (4-sulfamoylphenyl) -urea; 9) N- (5-isopropyl-1, 3-thiazol2yl)-N'- (3-methoxy-phenyl) urea; 10) N- (5-broro-,3-thiazol-2-yl)-N'-(3-methoxy-phenyl)urea; 11) N- (5-phenyl-1, 3-thiazol-2-yl) (3-methoxy-phenyl) urea; 12) N-(5-cyclopropyl-1,3-thiazol-2-yl)..N(3-methoxyphenyl)-urea; 13) N- (5-isopropyl-1, 3-thiazol-2-yl) -Ne- (4-chloro-phenyl) urea; 14) N-(5-bromo-l, 3-thiazol-2-yl) (4-chloro-phenyl)-urea; N-(5-phenyl-l,3-thiazol2yl).N -(4-chloro-phenyl)urea; 16) N-(5-cyclopropyl-1,3-thiazol2yl)-N'-(4-chlorophenyl) -urea; 17) N-(5-isopropyl-l,3-thiazol-2-yl)-N'-(3-chloro-phenyl)urea; 18) N-(5-bromo-l, 3 -thiazol-2-yl)-N'(3-choropheny).urea; 19) N-(5-phenyl-l,3-thiazol-2-yl)-N'-3chloro-phenyl)urea; 15 N-(5-cyclopropyl-1,3-thiazo.y)N'(3-chlorophenyl) -urea; 21) N-.(5-isopropyl-1,3thiazo2yl)-Nf(2-chloro-phenyl)urea; 22) N- (5-bromo-1,3-thiazol-2-yl)..NK( 2 -chloro-phenyl)-urea; 23) N-(5-phenyl-,3thiazo2yl).NK-(2-choro-phenyl)urea; 24) N-(S-cyclopropy-1,3-thiazo12..yl).NL(2-chlorophenyl) -urea; 25) N-(5-isopropy1-1,3-thiazo2yl)-NL(4-methoxy-phenyl)urea; 26) N- (5-bronio-1,3-thiazol-2-yl) -N'-(4-methoxy-phenyl).

urea; 27) N-(5pey-,-hizl2y)N(-mtoypey) urea; 28) N-(5-cyclopropyl-1,3-thiazo-2.yl)-N'-(4.methoxyphenyl) -urea; 29) N-(5-isopropyl-1,3-thiazol1>y).N-(4-hydroxy-phenyl)urea; 30) N-(5-bromo-l,3-thiazo-2y)N-(4-hydroxypheny).

urea; 31) N- (5-phenyl-,3-thiazo-2y)N-(4hydroxy-pheny1)urea; 32) N-(5-cyclopropyl-1,3-thiazo-2yl)-NV(4-hydroxy phenyl) -urea; 33) N-(5-isopropyl-1,3-thiazol.2.y)-NK(3-hydroxy-phenyl)urea; 34) N-(5-bromo-1,3-thiazo1-2-y)'-(3-hydroxy-phenyl)urea; 35) N-(5-phenyl-l,3-thiazo-2yl)-N'-(3hydroxy-phenyl)urea; 36) N-(5-cyclopropy-1,3thiazo2y)NL(3-hydroxyphenyl) -urea; 37) N- (5-isopropyl-1,3-thiazol-2-y).N. (2-methoxy-phenyl)urea; 38) N-(5-bromo-l,3-thiazol-2-yl)-Nf(2.methoxy-phenyl)urea; 16- 39) N- (5-phenyl-1,3-thiazol-2-yl)-N'-(2-methoxy-phenyl)urea; N-(5-cyclopropy1-1,3-thiazol-2-yl)-N'-(2-methoxy.

phenyl) -urea; 41) N- (5-isopropy1-1,3-thiazol-2-yl)-N-(2-hydroxy-phenyl)urea; 42) N- (5-bromo-1, 3-thiazol-2-yl) (2-hydroxy-phenyl) urea; 43) N-(5-phenyl-1,3-thiazol-2-yl)-N'-(2-hydroxy-phenyl)urea; 44) N-(5-cyclopropy1-1,3-thiazol-2-yl)-N'-(2hydroxyphenyl) -urea; N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4-nitro-phenyl)urea; 46) N-(5-bromo-1,3-thiazol-2-y)-N'-(4-nitro-pheny).urea; 47) N- (5-pheny1-1, 3-thiazo1-2-y1) (4-nitro-phenyl)-urea; 48) N-(5-cyclopropyl-1,3-thiazol-2-yl)-N'-(4-nitro-phenyl)urea; 49) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4-amino-phenyl).

urea; N- (5 -bromo- 1, 3- thi azol 2-yl) (4 -amino -phenyl) -urea; 51) N-(5-phenyl-1,3-thiazol-2-yl)-N'-(4-amino-pheny).urea; 52) N-(5-cyclopropy1-1,3-thiazo1-2-y1)-N'-(4-amino-phenyl)urea; 53) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3-nitro.phenyl)urea; 54) N- (5-bromo-1,3-thiazol-2-yl)-N)-(3-nitro-phenyl)-urea; N- (5-phenyl-1,3-thiazol-2-yl)-N'-(3-nitro-phenyl).urea; 56) N-(5-cyclopropyl-1,3-thiazol-2-yl) -N'-(3-nitro-phenyl)urea; 57) N-(5-isopropy1-1,3-thiazol-2-yl)-N'-(3-amino-phenyl)urea; 58) N- (5-bromo-1,3-thiazol-2-yl)-N'-(3-amino-phenyl)-urea; 59) N-(5-pheny1-1,3-thiazo1-2-yl)-N'-(3-amino-phenyl)-urea; 60) N-5ccorpl13tizl2y)N-3aiopey) urea; 61) N- (5-isopropyl-1,3--thiazol-2-yl) -N'-benzyl-urea; 62) N- (5-bromo-1,3-thiazol-2-yl)-N'-benzyl-urea; 17 63) N- (5-phenyl-1,3-thiazol-2-yl) -N'-benzyl-urea; 64) N- (5-cyclopropyl-1, 3-thiazol-2-yl) -N'-benzyl-urea; N- (5-isopropyl-1,3-thiazol-2-yl) (pyrid-3-yl) -urea; 66) N-(5-bromo-1,3-thiazol-2-yl)-N'-(pyrid-3-yl)-urea; 67) N-(5-phenyl-1,3-thiazol-2-yl)-N'-(pyrid-3-yl)-urea; 68) N- (5-cyclopropyl-1,3-thiazol-2-yl) (pyrid-3-yl) urea; 69) N-(5-bromo-1,3-thiazol-2-yl)-N'-(pyrid-4-yl)-urea; N- (5-isopropyl-1,3-thiazol-2-yl) (pyrid-4-yl) -urea; 71) N-(5-phenyl-1,3-thiazol-2-yl)-N'-(pyrid-4-yl)-urea; 72) N- (5-cyclopropyl-1,3-thiazol-2-yl) (pyrid-4-yl) urea; 73) N- (5-isopropyl-1,3-thiazol-2-yl) (pyrid-2-yl) -urea; 74) N- (5-bromo-1,3-thiazol-2-yl) (pyrid-2-yl) -urea; 75) N-(5-phenyl-1,3-thiazol-2-y)-N'-(pyrid-2-yl) -urea; 76) N- (5-cyclopropyl-1,3-thiazol-2-yl) (pyrid-2-yl) urea; 77) N- (5-isopropyl-1,3-thiazol-2-yl) (benzothiophen-2yl) -urea; 78) N- (5-bromo-1,3-thiazol-2-yl) (benzothiophen-2-yl) urea; 79) N- (5-phenyl-1,3-thiazol-2-yl) (benzothiophen-2-yl) urea; 79a) N- (5-cyclopropyl-1,3-thiazol-2-yl) (benzothiophen- 2-yl)-urea; N-(5-isopropyl-1,3-thiazol-2-yl)-4-morpholine carboxamide; 81) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4-methylphenyl)urea; 82) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3fluorophenyl) urea; 83) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4cyanophenyl) urea; 84) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3cyanophenyl) urea; N-(5-isopropyl-1,3-thiazol-2-y)-N'-(2,6dimethyiphenyl) urea; H:\Shonal\Keep\Speci\P53468- Divisional Speci 17/06/04 17a 86) N-(5-isopropyl-1,3-thiazol-2-yl)-N-(4fluorobenzyl) urea; H;\Shonal\Keep\Speci\P53468- Divisional Speci 17/06/04 18- 87) N- (5-isopropy1, .3thiazo2yl)-N'-( 3 acetyiphenyl) urea; 88) N-(5-isopropyl3-thiazol2yl)-NI( 4 ace tyiphenyl) urea; 89) 3- ({[(5-isopropyl-1, 3-thiazol-2yl) aminoj carbonyllamino)benzoic acid; N-5iorpl13tizl2y)N-4 isopropyiphenyl) urea; 9-1) f(5-isopropyl-1,3-thiazol2.

yl)aminoj carbonyllamino)benzamide; 92) N-(S-isopropyl-1,3thiazo2.yl)-N( 4 methoxybenzyl) urea; 93) N-(5-isopropy1,3-thiazo12-yl)-N'( 4 butyiphenyl) urea; 94) N-(5-isopropy-13thiazo-2-yl)-NI( 4 trifluoromethylphenyl )urea; N- (5-isopropy il3th azo2-l-yl)Naromhen~~ra 96) N-(5-isoropy11>cthiazo12-y1)N-( 4 cyclohexyiphenyl )urea; 97) N-(5-isopropy1,3-thiazo12-yl)-N-( 4 phenoxyphenyl urea; 98) N-(5-isopropy>.1,-thiazo1>yl)N6'( 4 benzyloxyphenyl) urea; 99) N-(5-isopropy-1,3-thiazol1>yl)

N

t dimnethyiphenyl) urea; 100) N-(5--isopro13thiazo12-yl)-N-( 2 3 dirnethyiphenyl) urea; 101) N-(5-isopropy-1,3thiaz2y)N(methxyll.

biphenyll urea; 102) N-(5-isopropy13thiazo2y)34-dihydro2l isoquinoljne carboxamide; 103) N-~benzyli- l(5isoop py-13titl 2 l)-N methylurea; 104) N-(5-isopropy1.1,thiazo1>y1)667-dithy 3 4 dihydro-2 (1H) -isoquinoline carboxamide; 105) N-(5-isopropy13th iaz-2)N-[f( 3 hloo methyl) -phenyl] urea; 19- 106) N-5iorPl13tizl2y)N-(-hoo6 methyl )phenyl ]urea; 107) N-(5-isopropyl-1,3-thiazol12..y)N-(2,5 dime thoxyphenyl )urea; 108) N-(5-isopropy1-1,3thiazo-2-yl)-Nf (3,4 dime thoxyphenyl )urea; 109) N-5iorpl13tizl--l-'[2mtoy5 chioro) phenyl Iurea; 110) N- (5-isopropyl-1, 3-thiazol-2-yl) ((2-chloro-4methoxyphenyl)urea; 111) N-(5-isopropyl13thiazop>yl)-Ns( 3

,S

dichiorophenyl) urea; 112) N-[(l,l'-biphenyl)2.ylN(isopro1 3 thial- 2 yl )urea; 113) N-ethyl-N'-(5isopropyl13-thiazo- 2 -yl) -N--phenylurea; 114) N- ({[I(5-isopropyl-1, 3-thiazol-2yl)amino] carbonyllamino) 2 -methoxyphenyl~acetamjae; 115) 2- {II(5-isopropyl-1, 3-thiazol-2yl )amino] carbonyl) amino) -N-phenylbenzamide; 116) N-(5-isopropy-1,3-.thazop.>yl)-NI(2morpholinophenyl )urea; 117) N-[ 4 -({[(5-isopropyl-1,3-thiazol.2yl) amino] carbonyl}amino)phenyl] -N-methyl acetamide; 118)1 N- [cyclohexyl (methyl) amino] methylphelyl) isopropyl-l 3 -thiazol-2-yl)urea; 119) N- [(5-isopropyl-1, 3-thiazol-2yl)aminoJ carbonyl) amino) 4 -methoxyphenyljacetamide; 120) N-(5-isopropy13thiazo2y)4(4-methoxyphnl)l-piperazine carboxamide; 121) N-( 2 -furylmethyl)N(isopropyl3thial- 2 yl) urea; 122) 4 -fluorophenyl)N(5isopropy1,3-thiaol- 2 yl )urea; 123) N-(2-methoxybenzy)N (5isopropyl 1 3-thiazol-2yl)urea; 124) N-( 5 -isopropyl-1,3-thiazol-2 yl) (1 mthyllHpyrrol-2-yl) ethyl] urea; 20 125) N-34dmtoyezl-'(Siorpl13tizl2 yl) urea; 126) N-(5-isopropyll,3thiazol 2 yl)- 4 -oolpey-'3 triazaspiro S)decane-~8-carboxamide; 127) N-(5-isopropy-1,3thiazl 2 l)l14doa8 azaspiro SI1decane-8-carboxamide; 128) N-(5-isopropy1,3-thiazo2y)-NI[ 2 -l piperidinyl) ethyl 1urea; 129) N-(5-isopropy13thiazo2y)-NI-[2 morpholinyl) ethyllurea; 130) 4 4 fluorophenyN(5isopropyl1l 3 -hiazl2y) piperazine carboxamide; 131)

N-[

4 4 lcohenorop-ehyl)3ethxazlylNi, isopropyl-l, 3 -thiazol-2-y1)urea; 132) 4 4 -fluorophenyl) 1,3-hao -l)lpprdn carboxamide; 133)

N-(

3 3 thial- 2 yl) urea; 134) 2 thiazol-2>yl)urea; 135) N-(5-isopropyl1.3thiazo2yl)-N-(4opiperidinyl) urea; 136) N- 3 -acetylaminophenyl)-NI (5-isopropyl,3-thiazol- 2 yl) urea; 137) N-f[ 3 -(2-fury)lH.pyrazol5ylJ-N'-(5-sopoyl thiazol-2-yl )urea; 138) N- 4 [ethyl (isopropyl) amino] henl -N-11sorpl 1, 3 -thiazol-2-yl) urea; 139) N-(,3benzoio xo15yl-N-5-1)Nf(Sil-13tizl2 yl)urea; 140) 5 -({[(5-isopropyl1,3thiazol-2 yl) amino] carbonyl Jarino) -l-pheny1-Hpyrazole-4 carboxamide; 141) N-(5-isopropy13thiazo2yl)-Nt-( pyridinylmethyl )urea; 142) N-(5-isopropyl13thiazo2yl)-NI( 2 -yailur 143) XN(5-isopropy-1, 3thiazo1..2y1)-N-(5-hl-1 oxadiazol-2yl) urea; -21 144) N-~(-isoprop1,3thiazo pyl 4(2ox- 2 3 -dhyd 1H-benzimidazollyl) -l-piperidine carboxamide; 145) N-(l, 3 benzothiaz6y)N(5isopropy1 3 thzl- 2 -yl) urea; 146) N-13dmty-Hprzl5y)N-5iorpl13 thiazol-2-yl) urea; 147) N- 3 -phenyl-1l-methy-Hpyrazo-5yl)-NJ (S-isopropyl- 1, 3 -thiazol-2-y1)urea; 148) N- (5-isopropy13thiazo1y)3hydroxlpiperidine carboxamide; 149) N-(5-isoprop13hiaz-2y)N( 2 thl-1 3 dioxo-2,3-dihydro.Hisoindo15-yl)urea; 150) N-(5-isopropy-1,3thiaz 2y)4benzy-lppeain carboxamide; 151) N-(-isopopp-13thiazo12y1)4.methlhyl liaz carboxamide; 152) 4 -hydroxy-N(5isopropy13thiazol 2 yl)-l piperidine carboxamide; 153) N-(5-isopropy-13thiazo12-y1)- 3 azabicyclo[32.2nonane-3carboxamide; 154) N-(-ispoprop11th azo12y1)4-4(actlhl)piperazine carboxamide; 155) 4-bs4furpey)N(5iorpl13tizl2 yl) -l-piperazine carboxamide; 156) N-(5-isopropyl3thiazol2yl)4ox- 2 3 4

S

tetrahydro-1H-1,S-benzodiazepinelcarboxamide; 157) N-(5-isopropy13thiazo2yl)N(, 6 7 8 tetrahydro-lnaphtalenyl) urea; 158) N-( 4 -pheny-2thiazo y)N(5isoprl 3 thizlyl)urea; 159) 4 4 -fluorobenzoy)N(5ispopr13thiazol 2 yl) l-piperidine carboxamide; 160) N-(5-isopropy1-1,3-thiazo2y)N-13dihydro- 2 benzofuran-5.y1 )urea; 161) N- (-isopopyl 1 3thiazo12y1) -4 (2piidl) piperazine carboxamide; 162) N-(5-isopropy-1,3thiazo2y)3oxo-34dihydro 1 (2H) -quinoxaline; 22 163) orpl1 -hao--l N-(Hidzl6 yl) urea; 164) N-(5-isopropy1,3.thiazo-2yl)Nui( 2 chlorobenzyl )urea; 165) N-(5-ispopro13thiazo2yl)-N( 2 4 dichlorobenzyl) urea; 166) N-(5-isopropy1,.3thiazo2y1)-Ni( 3 fluorobenzyl) urea; 167) N-(5-isopropy1,.3thiazo2y)N( 3 4 dichlorobenzyl) urea; 168) N-~(-ispopr 13thiazo21)-NJ-( 2 4 difluorobenzyl) urea; 169) N-(5-isopropy1,3.thiazo2yl)-NI( 2 difluorobenzyl) urea; 170) N-(S5-isopropy-1,3-thiazol12 yl) N'2,6 difluorobenzy urea; 171) N-~(-isopropyl13 thiazo z2p.>y1)NI[Chyrod 3 methoxy) benzyl Jurea; 172) N-(5-isopropy1,3thiazol2y N(thl- 2 furyl)urea; 173) N-~(-isopropy13thiazo2yl)-Ni( 4 rnethylsulfonylbenzyl )urea; 174) N-[(lR, 2 -hyR)>hy-2,-dxydro3dihd-l)-d.( isopropyl-1, 3 -thiazol-2-y1)urea; 175) N-(5-isopropy-1,3-thiazo21)-Nr-(4 chlorobenzyl) urea; 176) N-(5-isopropy13thiazo21y)-NI-( 2 pyridinylmethyl) urea; 177) N-(5-isopropy13thiazo1-2yl).Nu-( 3

,S

dirnethoxybenzyl) urea; 178) N-(5-isopropy1-1,3-thiazo12-yl)-NI( 3 pyridinylmethyl) urea; 179) N-~(-isopropy1,3thiazo2yl)-NI( 4 trifluorobenzyl) urea; 180) N-(5-isopropy113-thiazol121y)N( 3 trimethoxybenzyl )urea; 181) N-(5-isopropy13thiazo21y)-NI( 2 dime thoxybenzyl) urea; 23 182) N-(5-isopropyl.1,3thiazol2yl)-NI( 4 dime thylaminobenzyl) urea; 183) N-(5-isopropyl3thiazol2yl)-N-( 2 dime thoxybenzyl )urea; 184) N-(S-isopropyl3thiazol2yl)-NI[( 2 -ch1o6phenoxy) benzyl] urea; 185) N-5iorpl13tizl2y)N-(R2)2hdoy 2, 3 -dihydro-1H-indenl1yllurea; 186) N-(5-isopropy1,3thiazop..2y1)N'-[ [(hdry 4 methyl )phenyl] urea; 187) N-(5-isopropyl13.thiazol2yl)-N1[ 4 -(lH benzimidazo-2.yl)phenylj urea; 188) N-(5-isopropy-1,3thiaz 2y)N'-( 3 hnl urea; 189) N-(5-isopropy1,3thiazo12.y)N(2methl- 6 quinolinyl) urea; 190) N-(5-isopropyl3thiazol2yl)-N[ 4 (cyanomethyl) phenyl Iurea; 191) N-(S sopropy-1 3thia o1yl

N(

2 qinlinl 192) N-(-isoprop13thial o-l)yN(lo 2 3 dihyd 1H- inden- 5-yl) urea; 193) N-(5-isopropy1,3thiazo y)N(3oxo1 3 -dihydr 2 -benzofuran- -yl) urea; 194) N-(5-isopropy-1,3-thiazol12-yl)N'-(5-oxo-,6,7,8 tetrahydro-2-naphtalenyl) urea; 195) methyl-3- (5-isopropyl-1, 3-thiazol-2yl) amino] carbonyl}amino) 4 -methylbenzoate; 196) methyl- 4 -(([(5isopropy1,3-thiazol- 2 yl)amino] carbonyllamino) 3 -methylbenzoate; 197) N-(5-isopropy13-ththiazo12y1)Nr'(4- idz[12 a Jpyridin-2 -yl -phenyl )urea; 198) ethy-4(([(5isopopp-1,3thzl- 2 yl) amino] carbonyl }amino) benzoate; 199) (2R)-l-benzyl-2(([ (5-isopropyll13..thiazol-2 yl),axino] carbonyl}amino)propanamide; 200) 2-hydroxy-5-({(S-isopropyl-1, 3-thiazol-2yl) amino] carbonyl)benzoic acid; 24 201) 2 -chloro5([(5isopopy-13thzl- 2 yl) amino] carbonyllamino) benzoic acid; 202) 3- (5-isopropyl-1, 3-thiazol.-2yl) amino] carbonyl~amino)benzoic acid; 203) N-(S-isopropyl-1,3-thiazol-2yl)

.N

1 (5-mehil3 isoxazolyl) urea; 204) N-(5-isopropy1,3thiazo2y1,Nf( 2 ,6 dimethoxyphenyl )urea; 205) N-(5-isopropyl3thiazol2yl)-NI( 2 3 dimethoxybenzyl )urea; 206) N-(5-isopropy13thiazo2yl)-N-( 3 4 difluorobenzyl) urea; 207) N-(S-isopropyl3thiazol2yl)-NI( 2 4 dime thylphenyl )urea; 208) N-(5-isopropy13thiazo2yl)-NI(lH-bezmdol5 yl) urea; 209) N-~(-isopropy-1,3thiazop2y)-N[(R)phenyiglicinamido] urea; 210) N-(5-isopropy-1,3thiazo1>yl)-NI( 2 phenoxyacetamido) urea; 211) N-5iorpl13tizl2y)N-() phenylglicinamji urea; 212) N-(5-isopropy1,.3thiazo-2y)-Ne( 2 -[(l-mtyimidazol-2 -yl )methoxy] phenyl }urea; 213) N-( 3 -iodopheny)N(5isopropl1, 3 -thiao-y~ra 214) N-(5-isoprop13thiazo2y)N[ 3 3 ehoy propynyl) phenyl Iurea; 215) N-{ 3 3 -(dimethyamino)propyljphen11-'-5 isopropyl-1, 3 -thiazol--yl)urea; 216) N-[ 4 -([(5isopropy113-thiazo12yl)amino] carbonyl~amino)phenylmethanelfaide 217) 2 3 -([(5-isopropyl-1,3.thiazol.2ylamino] carbonyllamino)anilinolacetamide; 218) N-[ 3 thiazol-2>yl)urea; 219) N-(imidazo[1,2-alpyridin2yl mthyl)-N'-(-isopropyl- 1, 3 -thiazol-2>yl)urea; 25 220) 2 -{[([(5-isopropyl-1,3-thiazo-2-yl)aminolcarbony11(2propynyl) amino] methyl~benzenesulfonamide.

221) N-l-no--l--5iorpl13tizl2 yl )urea; 222) (iS) -2-hydroxy-l-phenylethylp-NL(5-isopropyl13thiazol-2-yl)urea; 223) N-(lHindol-5-yl)-N'-(5isopropyl1,3thiazoi.

2 yl)urea; 224) (lR- 2 -hydroxy-l-phenylethylp.NL.(5-isopropyl-l, 3 thiazol-2-yl)urea; 225) N-(5-isopropyl-1,3thiazol2yl)-N-butylurea; 226) N- (5-isopropyl-1,3-thiazol-2-yl)N.benzoylurea; 227) N-(5-methyl-1,3-thiazol2yl)..N-(2 6 dimethyiphenyl )urea; 228) N-(5-methyl-1,3-thiazol2yl)-N'benzylurea; 229) N- (5-methyl-1, 3-thiazol2y1) N'-butylurea; 230) N-5mty-,-hao--l)4mrhlncroaie 231) N- (5-methyl-l, 3-thiazo>2-yl) -N'phenylurea; 232) N- (5-methyl-., 3-thiazol-2-yl)N- 4 -methoxybenzylurea; 233) N-(-ehl1 4floohnl ra 234) N- (l-ethyl-2-pyrrolidinyl)methyl N' (methyl1,3thiazol-2-yl) urea; 235) N-(5-methyl-1,3thiazo2y)N'(5-hydroxylH-pyrazol- 3-yl)urea; 236) N-(5-methyl-,3-thiazo 2.y)N'-.(3..pyridinyl)urea; 237) N-(4-fluorophenyl)N'4(5.methyl13thiazol-2yl)urea.

The compounds of formula object of the present invention and the salts thereof can be obtained, for instance, by a process comprising: a) when is a hydrogen atom reacting a compound of formula (II) I>.NH (11) wherein R. is as defined above, with a compound of formula (III) Ri-NCO (111) -26wherein R is as defined above; or b) when R, is a hydrogen atom or has the meanings above reported reacting a compound of formula

(IV)

R S NCO

(IV)

wherein R is as defined above, with a compound of formula (V)

(V)

R2 wherein R, and R 2 are as defined above; and, if desired, converting a 2 -ureido-l,3-thiazole derivative of formula into another such derivative of formula and/or into a salt thereof.

The compounds of formula can alternatively be obtained by a process comprising: reacting a compound of formula (II) wherein R is as described above with 4-nitrophenyl-chloroformate, or a polymer supported form of it, thus obtaining a compound of formula or a polymer supported form of it, N O (VI) R N=0 0O wherein R is as described above; and reacting a compound of formula (VI) with a compound of formula

(V)

R

1 11

(V)

R2 wherein R, and R 2 are as described above; and, if desired, converting a 2 -ureido-l,3-thiazole derivative of formula or a polymer supported form of it, into another such derivative of formula and/or into a salt thereof.

27 More particularly, when referring to the process performed by using polymer supported species, the synthetic pathway can be summarized as follows: CO H (V o(Vi) 0, HS

C

Ncr 0 I0 o o0

I

(ix) 0 H N

N

0 S

HN

R

R2 In addition, when referring to the process performed by using polymer supported species, conventional reaction conditions are well known to the skilled man.

It is further clear to the man skilled in the art that if the compound of formula prepared according to the above processes, is obtained as an admixture of isomers, their separation into the single isomers of formula

(I)

according to conventional techniques is still within the scope of the present invention.

Likewise, the conversion into the free 2-ureido-l,3thiazole derivative of a corresponding salt thereof, according to well-known procedures in the art, is still within the scope of the invention.

The above process-variants are analogy processes which can be carried out according to well known methods.

-28- The reaction between a compound of formula (II) and a compound of formula (III), or the reaction between a compound of formula (IV) and a compound of formula can be carried out in a suitable solvent such as, for instance, dichloromethane, chloroform, tetrahydrofuran, diethyl ether, 1,4-dioxane, acetonitrile, toluene or acetone, at a temperature ranging from room temperature to reflux for a time varying between about 1 to 96 hours.

The reaction of a compound of formula (II) to give a compound of formula (VI) is carried out with 4nitrophenylchloroformate, or a polymer supported form of it, in the presence of a tertiary base such as, for instance, triethylamine, N-methylmorpholine,

N,N-

diisopropylethylamine or pyridine, in a suitable solvent such as toluene, dichloromethane, chloroform, diethylether, tetrahydrofuran, acetonitrile, dioxane or N,Ndimethylformamide, at a temperature ranging from approximately -10 0 C to room temperature.

The reaction between a compound of formula (VI) and a compound of formula to give a compound of formula

(I)

can be carried out in a suitable solvent such as toluene, dichloromethane, chloroform, diethylether, tetrahydrofuran, acetonitrile, 1,4-dioxane or N,N-dimethylformamide, at a temperature ranging from about room temperature to reflux.

In the above-mentioned scheme, as far as the solid phase approach is concerned, compound (VIII) can be prepared by reacting compound (VII) with 4 -mercaptophenol in the presence of a base such as potassium tert-butoxide, potassium carbonate or potassium sodium hydroxide and in a suitable solvent such as N,N-dimethylformamide at a temperature ranging from 40 to 60 The reaction between compound (VIII) and p-nitrophenylchloroformate to give compound (IX) can be carried out in presence of a base such as N-methylmorpholine, triethylamine or

N,N-

diisopropyethylamine in a suitable solvent such as dichloromethane, chloroform, 1,4-dioxane or

N,N-

dimethylformamide at room temperature.

-29- The reaction between compound (IX) and the compound of formula wherein R is as described above, thus obtaining the compound of formula can be carried out in a suitable solvent such as dichloromethane, chloroform, toluene or N,N-dimethylformamide at room temperature for a time varying between about 2 to 22 hours.

The reaction between the compound of formula wherein

R

is as described above, and the compound of formula

(V)

wherein R and R, are as described above, thus obtaining the compound of formula can be carried out in the presence of a base such as triethylamine, N,N-diisopropylethylamine or N-methylmorpholine in a suitable solvent such as toluene, acetonitrile or N,N-dimethylformamide at a temperature ranging from room temperature to 100 0

C.

Also the optional conversion of a compound of formula

(I)

into another compound of formula can be carried out according to known methods.

As an example, the nitro group of a compound of formula

(I)

may be converted into an amino group by treatment, for example, with stannous chloride in concentrated hydrochloric acid and by using, if necessary, an organic solvent such as acetic acid, 1, 4 -dioxane and tetrahydrofuran, at a temperature varying between room temperature and about 100 0

C.

Likewise, an alkylthio or an arylthio group may be converted into the corresponding alkylsulfonyl and arylsulfonyl group by reaction, for example, with mchloroperbenzoic acid in a suitable solvent such as dichloromethane or chloroform, at a temperature varying from about -5 0 C and room temperature.

The optional salification of a compound of formula or the conversion of a salt into the free compound as well as the separation of a mixture of isomers into the single isomers may be carried out by conventional methods.

The compounds of formula (II) and (IV) according to the above processes are known compounds or can be obtained according to known methods.

For example, a compound of formula (II) wherein R is as defined above can be obtained by reacting a compound of formula

(XI)

X

R "CHO wherein X is a bromine or chlorine atom, with thiourea in a suitable solvent such as methanol, ethanol, tetrahydrofuran, 1, 4 -dioxane or toluene, at a temperature varying between room temperature and reflux, for a suitable time ranging from about 1 hour to about 24 hours.

A compound of formula (IV) can be obtained, for instance, by reacting a compound of formula (II) wherein R is as defined above with bis(trichloromethyl) carbonate or trichloromethyl chloroformate in the presence, if necessary, of a tertiary base such as triethylamine,

N,N-

diisopropylethylamine or pyridine, in a suitable solvent such as dichloromethane, chloroform or toluene, at a temperature ranging from about -20 0 C to reflux.

The compounds of formula (III), and (XI) are well-known commercially available compounds or, alternatively, may be conventionally prepared according to known methods in organic chemistry.

When preparing the compounds of formula according to the process object of the present invention, optional functional groups within both the starting materials or the intermediates thereof, which could give rise to unwanted side reactions, need to be properly protected according to conventional techniques.

Likewise, the conversion of these latter into the free deprotected compounds may be carried out according to known procedures.

Pharmacology The compounds of formula are active as cdk/cyclin inhibitors as they gave positive results when tested according to the following procedure.

-31 The compounds of formula are therefore useful to restrict the unregulated proliferation of tumor cells, hence in therapy in the treatment of various tumors such as, for instance, carcinomas, e.g. mammary carcinoma, lung carcinoma, bladder carcinoma, colon carcinoma, ovary and endometrial tumors, sarcomas, e.g. soft tissue and bone sarcomas, and the hematological malignancies such as, e.g., leukemias.

In addition, the compounds of formula are also useful in the treatment of other cell proliferative disorders such as psoriasis, vascular smooth cell proliferation associated with atherosclerosis and post-surgical stenosis and restenosis and in the treatment of Alzheimer's disease.

The inhibiting activity of putative cdk/cyclin inhibitors and the potency of selected compounds was determined through a method of assay based on the use of the MultiScreen-PH 96 well plate (Millipore), in which a phosphocellulose filter paper was placed at each well bottom allowing binding of positive charged substrate after a washing/filtration step.

When a radioactivity labelled phosphate moiety was transferred by the ser/threo kinase to the filter-bound histone, light emitted was measured in a scintillation counter.

The inhibition assay of cdk2/Cyclin A activity was performed according to the following protocol: Kinase reaction: 1.5 gM histone H1 substrate, 25 4M ATP (0.5 JCi

P

33 y-ATP), 30 ng Cyclin A/cdk2 complex, 10 4M inhibitor in a final volume of 100 il buffer (TRIS HC1 mM pH 7.5, MgC1 2 10 mM, 7.5 mM DTT) were added to each well of a 96 U bottom well plate. After 10 min at 37 oC incubation, reaction was stopped by 20 ul EDTA 120 mM.

32 Capture: 100 p1 were transferred from each well to MultiScreen plate, to allow substrate binding to Phosphocellulose filter. Plates were then washed 3 times with 150 p./well PBS Ca"/Mg" free and filtered by MultiScreen filtration system.

Detection: filters were allowed to dry at 37 0 C, then 100 pl/well scintillant were added and "P labelled histone H1 was detected by radioactivity counting in the Top-Count instrument.

Results: data were analysed and expressed as inhibition referred to total activity of enzyme All compounds showing inhibition 50 were further analysed in order to study and define potency (IC50) as well as the kinetic-profile of inhibitor through Ki calculation.

determination: the protocol used was the same described above, where inhibitors were tested at concentrations ranging from 0.0045 to 10 pM. Experimental data were analyzed by the computer program GraphPad Prizm.

Ki calculation: either the concentration of ATP and histone HI substrate were varied: 4, 8, 12, 24, 48 pM for ATP (containing proportionally diluted

P"

3 y-ATP) and 0.4, 0.8, 1.2, 2.4, 4.8 pM for histone were used in absence and presence of two different, properly chosen inhibitor concentrations.

Experimental data were analysed by the computer program SigmaPlot for Ki determination, using a random bireactant system equation: Vmax

(B)

aKAK V 1+

AHB)B

K, KB aKAK where A=ATP and B=histone

HI.

-33- Following the method above described, a representative compound of formula of the invention, which is isopropyl-l,3-thiazol-2-yl)-N-(3,5-dimethylphenyl)urea, showed an inhibiting activity towards the cdk2/cyclin

A

complex corresponding to 0.56 pM In addition, the inhibiting activity of putative cdk/cyclin inhibitors and the potency of selected compounds was determined through a method of assay based on the use of a SPA (Scintillation Proximity Assay) 96 well plate assay.

The assay is based on the ability of streptavidin coated SPA beads to capture a biotinylated peptide derived from a phosphorylation site of histone.

When a radioactivity labelled phosphate moiety was transferred by the ser/threo kinase to the biotinylated histone peptide, light emitted was measured in a scintillation counter.

The inhibition assay of cdk5/p25 activity was performed according to the following protocol: Kinase reaction: 1.0 pM biotinylated histone peptide substrate, 0.25 uCi P33g-ATP, 4 nM cdk2/p25 complex, 0-100 pM inhibitor in a final volume of 100 p. buffer (Hepes mM pH 7.5, MgCl2 15 mM, 1 mM DTT) were added to each well of a 96 U bottom well plate. After 20 min at 37 oC incubation, the reaction was stopped by the addition of 500 ug SPA beads in phosphate-buffered saline containing 0.1% Triton X-100, 50 uM ATP and 5 mM EDTA. The beads were allowed to settle, and the radioactivity incorporated in the 3 3 P-labelled peptide was detected in a Top Count scintillation counter.

Results: Data were analyzed and expressed as Inhibition using the formula: 100X(l (Unknown Bkgd)/(Enz. Control Bkgd)) values were calculated using a variation of the four parameter logistics equation: -34- Y 100/[1 10 ^((LogEC50 X)*Slope)] Where X =log(uM) and Y Inhibition.

The compounds of formula are therefore useful to restrict the unregulated proliferation of tumor cells, hence in therapy in the treatment of various tumors such as, for instance, carcinomas; e.g. mammary carcinoma, lung carcinoma, bladder carcinoma, colon carcinoma, ovary and endometrial tumors, sarcomas, e.g. soft tissue and bone sarcomas, and the hematological malignancies such as, e.g., leukemias.

The compounds of the present invention can be administered either as single agents or, alternatively, in combination with known anticancer treatments such as radiation therapy or chemotherapy regimen in combination with cytostatic or cytotoxic agents.

As an example, the above compounds can be administered in combination with one or more chemotherapeutic agents such as, for instance, taxane, taxane derivatives, CPT-11, camptothecin derivatives, anthracycline glycosides, e.g.

doxorubicin or epirubicin, etoposide, navelbine, vinblastine, carboplatin, cisplatin and the like, optionally within liposomal formulations thereof.

The compounds of formula of the present invention, suitable for administration to a mammal, e.g. to humans, can be administered by the usual routes and the dosage level depends upon the age, weight, conditions of the patient and the administration route.

r l For example, a suitable dosage adopted for oral administration of a compound of formula may range from about 10 to about 500 mg pro dose, from 1 to 5 times daily.

The compounds of the invention can be administered in a variety of dosage forms, e.g. orally, in the form of tablets, capsules, sugar or film coated tablets, liquid solutions or suspensions; rectally in the form of suppositories; parenterally, e.g. intramuscularly, or by intravenous and/or intrathecal and/or intraspinal injection or infusion.

The present invention also includes pharmaceutical compositions comprising a compound of formula or a pharmaceutically acceptable salt thereof, in association with a pharmaceutically acceptable excipient (which can be a carrier or a diluent).

The pharmaceutical compositions containing the compounds of the invention are usually prepared following conventional methods and are administered in a pharmaceutically suitable form.

For example, the solid oral forms may contain, together with the active compound, diluents, e.g. lactose, dextrose, saccharose, sucrose, cellulose, corn starch or potato starch; lubricants, e.g. silica, talc, stearic acid, magnesium or calcium stearate, and/or polyethylene glycols; binding agents, e.g. starches, arabic gum, gelatine, methylcellulose, carboxymethylcellulose or polyvinyl pyrrolidone; disaggregating agents, e.g. a starch, alginic acid, alginates or sodium starch glycolate; effervescing mixtures; dyestuffs; sweeteners; wetting agents such as lecithin, polysorbates, laurylsulphates; and, in general, non-toxic and pharmacologically inactive substances used in pharmaceutical formulations. Said pharmaceutical preparations may be manufactured in known manner, for example,- by means of mixing, granulating, tabletting, sugar-coating, or film-coating processes.

The liquid dispersions for oral administration may be e.g.

syrups, emulsions and suspensions.

-36- The syrups may contain as carrier, for example, saccharose or saccharose with glycerine and/or mannitol and/or sorbitol.

The suspensions and the emulsions may contain as carrier, for example, a natural gum, agar, sodium alginate, pectin, methylcellulose, carboxymethylcellulose, or polyvinyl alcohol.

The suspension or solutions for intramuscular injections may contain, together with the active compound, a pharmaceutically acceptable carrier, e.g. sterile water, olive oil, ethyl oleate, glycols, e.g. propylene glycol, and, if desired, a suitable amount of lidocaine hydrochloride. The solutions for intravenous injections or infusions may contain as carrier, for example, sterile water or preferably they may be in the form of sterile, aqueous, isotonic saline solutions or they may contain as a carrier propylene glycol.

The suppositories may contain together with the active compound a pharmaceutically acceptable carrier, e.g. cocoa butter, polyethylene glycol, a polyoxyethylene sorbitan fatty acid ester surfactant or lecithin.

The following examples illustrate but do not limit the present invention.

Example 1 Preparation of methyl cyclopropylacetate Cyclopropylacetic acid (1.08 g; 10.57 mmol) was dissolved in 50 ml of methanol. The solution was cooled to 0OC and ml of sulfuric acid 96% were dropped under stirring. The solution was maintained at room temperature overnight and then poured onto ice-water, basified with 30 ammonium hydrate and finally extracted with methylene chloride. The organic layer was dried over sodium sulfate and evaporated to dryness to give 1.1 g of an oily product (90% yield) which was used as such without any further purification.

Example 2 -37- Preparation of 2-cyclopropylethanol Sodium (85 mg; 0.004 mmol) was dissolved in 50 ml of methanol and 8.7 g (0.23 mol) of sodium borohydride were added. A solution of 3.7 g (0.032 mol) of methyl cyclopropylacetate, prepared according to example 1, in ml of methanol was dropped to the mixture under stirring.

The reaction was maintained at reflux for 6 hours, then 300 ml of brine were added and the crude extracted with methylene chloride.

The organic layer was dried over sodium sulfate and evaporated to dryness to give 1.52 g (55% yield) of the title compound.

Example 3 Preparation of a compound of formula 2cyclopropylethanal Oxalyl chloride (1.24 ml; 14.18 mmol) was dissolved in ml of methylene chloride; after cooling to -600C a solution of 1.02 g (11.9 mmol) of 2 -cyclopropylethanol, prepared according to example 2, in 10 ml of methylene chloride was added dropwise. The mixture was maintained under stirring for 30 minutes at the same temperature, then 8.3 ml (59.5 mmol) of triethylamine were added.

After 2 hours at 00C water was added. The mixture was diluted with methylene chloride and washed successively with 1M hydrochloric acid, water, saturated sodium bicarbonate and finally with brine. The organic layer was dried over sodium sulfate and evaporated to dryness to give 0.31 g (30% yield) of the title compound.

Example 4 Preparation of a compound of formula isopropyl-1,3-thiazole 3 -Methylbutanaldehyde (2 ml; 18.6 mmol) was dissolved in ml of dioxane.

A solution 2% v/v of bromine in dioxane (47.81 ml; 18.6 mmol) was dropped therein at 00C. The mixture was maintained at room temperature under stirring for 2 hours, -38then 2.83 g (37.2 mmol) of thiourea and 10 ml of ethanol were added. After 6 hours at room temperature the solution was evaporated to dryness, the residue was dissolved in methylene chloride and the product extracted with IM hydrochloric acid; the aqueous layer was made basic by using 30% ammonium hydrate and extracted again with methylene chloride.

The organic phase was dried over sodium sulfate and evaporated under vacuum. The residue was chromatographed on a silica gel column, eluting with cyclohexane-ethylacetate to give 1.1 g (42% yield) of the title compound.

H-NMR (DMSO-d 6 6 ppm: 6.6 2H, NH 2 6.58

IH,

thiazole CH); 2.9 1H, CHMe 2 1.18 3H, MeCHMe); 1.17 3H, MeCHMTfe).

By analogous procedures the following compounds can be prepared: 2 -amino-5-phenyl-l,3-thiazole; and 2 -amino-5-cyclopropyl-1,3-thiazole.

Example Preparation of a compound of formula N-(5-bromo-1,3thiazol-2-vl) -N'-phenyl-urea Phenylisocyanate (1.7 ml; 15.6 mmol) was added to a solution of 2 -amino-5-bromo-l,3-thiazole hydrobromide (4 g; 15.6 mmol) and triethylamine (2.1 ml; 15.6 mmol) in dichloromethane (70 ml), maintained under magnetic stirring at room temperature. After about 4 days, methanol (7 ml) was added and the reaction mixture was then washed with brine, dried over sodium sulfate and evaporated.

The residue was purified by chromatography on silica gel (dichloromethane and then dichloromethane/methanol=90:10) to give 1.9 g of the title compound as a colourless solid 166-169OC/dec.).

'H-NMR (CDC1 3 6 ppm: 10.50 (bs, 1H, -NHCONHPh); 8.50 (bs, 1H, -NHCONHPh);7.45 J 7.6 Hz, 2H, o-Ph hydrogens); -39- 7.36 (dd, J 7.3 and 7.6 Hz, 2H, m-Ph hydrogens); 7.29 (s, 1H, thiazole CH); 7.16 J 7.3 Hz, 1H, p-Ph hydrogens).

By analogous procedure, and by starting from the corresponding isocyanate, the following compounds can be prepared: N- (5-phenyl-1, 3-thiazol-2-yl)-N-phenyl-urea H-NMR (DMSO-d') 6 ppm: 10. 56 (bs, 1H, -NHCONHPh) 8.99 (bs, 1H, NHCONHPh); 7.77 1H, thiazole CH); 7.6-7.0 lOH, phenyl); N- (5-bromo-1,3-thiazol-2-yl)-N-(4-sulfamoyl-phenyl)-urea; N- (5-isopropyl-1, 3-thiazol-2-yl) -N 4 -sulfamoyl-phenyl) urea m.p.>2000C H-NMR (DMSO-d) 6 ppm: 10.58 (bs, 1H, -NHCONHPh); 9.38 (bs, 1H NHCONHPh); 7.75 2H, H3 and H5 Ph); 7.61 2H, H2 and H6 Ph); 7.21 2H, SONH,); 7.02 1H, thiazole

CH);

3.02 1H, CH(Me)j; 1.22 3H, MeCHMe); 1.21 3H, MeCHMe); ESI(+)-MS: m/z 341 (100, N-benzoyl-N'-(5-isopropyl-1,3-thiazol-2-yl)urea m.p.217-219 0

C

1 H- NMR (400 MHz-DMSO-d) 6 ppm: 1.27 6H, J=6.8,

CH

3 CHCH); 3.11 1H, CH 3 CHCH); 7.18 1H, J=0.9,

H

thiazole); 7.54 2H, m-phenyl); 7.66 m, 1H, p-phenyl); 8.00 2H, o-phenyl); 11.50 (bs, 1H, NH); 11.80 (bs, 1H,

NH).

ESI m/z 290 (70, m/z 169 (100,

(NH-

C

6 HCONH,) N- (5-phenyl-1,3-thiazol-2-yl)-N'-(4-sulfamoyl-phenyl)-urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) 4 -sulfamoyl-phenyl) urea; N- (5-isopropyl-1, 3-thiazol-2-yl) -Nr- (3-methoxy-phenyl) -urea m.p. 149-1500C NMR (400 MHz-DMSO-d6) 6 ppm: 1.23 6H, J=6.8,

CH

3 CHCH); 3.06 1H, CH 3 CHCH,); 3.72 3H, CH); 7.02 (s, 1H, H thiazole); 6.57 (dd, 1H, J=8.3, 2.4, H-4 -phenyl); 6.93 1H, J=8.3, H-6 -phenyl); 7.18 2H, H-5',H-2 phenyl); 8.94 1H, NH); 10.35 (bs, 1H, NH).

ESI m/z 292 (100, N- (5-bromo-1, 3-thiazol-2-yl) (3-methoxy-phenyl) -urea m.p. 190-191 0

C

1 H- NMR (400 MHz-DMSO-d) 6 ppm: 7.44 1H, H thiazole); 3.72 3H, 6.61 (dd, 1H, J=2.4, 7.8, H-4 -phenyl); 6.94 (dd, 1H, J=2.0, 7.8, H-6 -phenyl); 7.13 (dd, IH, H-2 -phenyl); 7.20 (dd, 1H, J=7.8, 7.8, H-5 -phenyl); 8.95 1H, NH); 10.80 1H, NH).

ESI m/z 328 (100, N- (5-phenyl-1, 3-thiazol-2-yl) -N 3 -methoxy-phenyl) -urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) 3 -methoxy-phenyl) urea; N- (5-isopropyl-1, 3 -thiazol-2-yl)-N-phenyl-urea 1 H- NMR (400 MHz-DMSO-d) 6 ppm: 1.24 6H, J=6.8,

CH

3 CHCH,); 3.07 1H, CH3CHCH); 7.03 2H, H-thiazole H-4'-phenyl); 7.29 2H, H-5, H-3 -phenyl); 7.43 2H, H-2, H-6 -phenyl); 8.91 1H, NH); 10.30 (bs, 1H, NH).

ESI(+)-MS: m/z 262 (100, N- (5-phenyl-1,3-thiazol-2-yl)-N -phenyl-urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) -N-phenyl-urea; N-(5-isopropyl-1,3-thiazol-2-yl)-N -(4-chloro-phenyl)-urea m.p. 191-1930C H- NMR (300 MHz-DMSO-d) 6 ppm: 1.16 6H, J=6.8,

CH

3 CHCHE) 3. 00 iH, CH 3 CHCH) 6.95 1H, J=1.0,

H

thiazole); 7.40 2H,J=8.9 m-phenyl); 7.26 2H, J=8.9 o-phenyl); 9.01 (bs, iH, NH); 10.40 (bs, 1H, NH).

ESI m/z 296 (100, N- 5 -bromo-1, 3-thiazol-2-yl) 4 -chloro-phenyl) -urea; N-(5-phenyl-1,3-thiazol-2-yl)-N 4 -chloro-phenyl)-urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) -N 4 -chloro-phenyl) urea; N- (5-isopropyl-1,3-thiazol-2-yl) -N 3 -chloro-phenyl)-urea; N- (5-bromo-1, 3-thiazol-2-yl) (3-chloro-phenyl) -urea; 41 N- (5 -phenyl 3 -thiazol -2 (3 -chioro-phenyl) -urea; N- (5-cyclopropyl-1, 3-thiazolN2-y) 3 -chloro-phenyi) urea; N- (5 isopropyl 3- thiazol -2 -y1) 2 -chloro-phenyl) -urea NNR (400 NHz-DMSO-d,) 5 ppm: 1.24 6H, J=6.8, CH 3 CHCH.) 3.07 (in, i1H, CH CHJCH,); 7.07 (mn, 2H, H-thiazoie H-4'-phenyi); 7.31 (dd, iF!, J=7.8, 7.8, H-5'-phenyl); 7.47 iH, J=7.8 H-3*-phenyl); 8.14 (di, 1H, J=7.8, H-6'phenyl); 8.80 (bs, 1H!, NH); 11.01 (bs, 1H, NH)- ESI m/z 296 (100, N- (5-brorno-1, 3-thiazol-2-yl) (2-chloro-phenyl) -urea in.p.210-212 0

C

H- NI4R (300 NHz-DMSO-d,) 8 ppm: 7.29 1H, H-thiazole); 7. 02 (ddd, iH, J=1. 6, 7. 6, 7.6, H-4 -phenyl) 7.25 (ddd, 1H, J=1.6, 7.6, 7.6, H-S -phenyl); 7.41 (dci, 1H, J=1.6, 7.6, H- 3'-phenyl); 8.03 (cid, iF!, J=1.6, 7.6, H-6'-phenyl); 8.58 (s, i1H, NH); 11.31 (bs, iF!, NH).

ESI in/z 332 (100, N- (5-phenyl-i, 3-thiazoi-2-yl) -N 2 -chloro-phenyi) -urea; N- (5-cyclopropyl-1, 3-thiazol-2-y).-N 2 -chioro-phenyl) urea; N- (5-isopropyl-1, 3-thiazoi-2-yi) -N-(4-inethoxy-phenyi) -urea; N- (5 -bromo-i1, 3 -thiazoi 2-yi) -N (4 -rethoxy-phenyl) -urea; N- (5-phenyi-1, 3-thiazol-2-yi) -N (4-methoxy-phenyl) -urea; N- (5-cyclopropy1-1, 3-thiazo1-2-yl) (4-iethoxy-phenyl) urea; N- (5-bromo-i, 3-thiazoi-2-yl) 4 -hyciroxy-phenyl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl) -N (4-hyciroxy-phenyl) -urea; N- (5-cyclopropy1-1, 3-thiazo-2-y) (4-hydroxy-phenyl) urea; N- (5-broino-i, 3-thiazol-2-yl) -N (3-hyciroxy-phenyl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl)-N- (3-hyciroxy-phenyl) -urea; N- (5-cyclopropyl, 3-thiazol-2-y1) -N (3-hydroxy-phenyl) urea; N- (5-isopropyi-1, 3-thiazol-2-yl) 2 -methoxy-phenyl) -urea in.p. 184-185OC; -42- IH-NMR (400 MA~z-DMSOd) 6 ppm: 1.23 6H, J=6.7, CH 'CiCH); 3.07 (in, 1H-, CHCHCH,); 3.85 3H, OCH,); 6.92 (mn, 1H Hphenyl); 7.01 (in, 3H, H-phenyl H-thiazole); 8.07 1H, J=8.3, H-6-phenyl); 8.80 (bs, 1H, NH); 10.82 iN,

NH).

ESI(+)-MS: in/z 292 (100, N- (5 -broio1, 3 thiazo 2 yl)-N 2 -methoxy-pheny1) -urea m.p. 2 18-2200C 'H-NM!R (300 NHz-DMSO..ci) 6 ppm: 3.79 3H,

CH

3 O) 6.90-7.98 2m, 4H, phenyl) 7. 36 1H, H thiazole) 8.57 1H, N-H) 11. 13 (bs, 1H, NH).

ESI m/z 328 (100, N- (5-phenyl-1 3-thiazol-2-yl) -N 2 -methoxy-phenyl) -urea; N- (5-cyclopropyl-1 3-thiazol-2-y1) -N 2 -iethoxy-phenyl) urea; N- (5-broino-1, 3-thiazol-2-yl) 2 -hydroxy-phenyl) -urea; N- (5-phenyl-1 3-thiazol-2-yl) 2 -hydroxyphenyl)-urea N- (5-cyclopropyl1, 3-thiazo- 2 -yl) -N 2 -hydroxy-phenyl) urea; N- 5 -isopropyll1 3 -thiazol2yl)N (4it-henl ue 1H- NMR (400 MHz-DMSO-d,) 6 ppm: 1.23 6H, J=6.8, CH 3 CHCH 3.14 (mn, iN, CHCHCH); 7.04 1H, H-thiazole); 7.74 (di, 2H, J=9.3, H-6'-phenyl) 8.18 2H, J=9.3, H-5'-phenyl) 9.65 (bs, 1H, NH) 11 (bs, 1H, NH).

ESI -MS: m/z 307 (100, N- (5-bromo-i, 3-thiazoi-2.yl) 4 -nitro-phenyl)-urea; N- (5-phenyl-1i 3-thiazol-2.y1) 4 -nitro-phenyl) -urea; N- (5-cycopropy-1, thiazo12-yl)-N 4 -nitro-phenyi)-urea; N- (5-isoprop -yl.1, 3 -thiazol-2y)-N'- 3 -nitro-phenyl) -urea m.p. 22 0-2220C 1 NH- {R (400 MHz-DMSO-d,) 6ppm: 1.24 6H, J=6.9, CHCHCH,) 3. 05 (in, iH, CHCNCH,); 7.04 IH, H thiazole); 7.56 (dci, 1H, j=8.2, 8.2, H-5- phenyl) 7.77 iN, J=8.2, H-6-phenyl) ;7.

8 3 (dd, 1H, J=8.2, 1.5, H-4 -phenyl); 8.58 1H, j=1.5, H-2'-phenyl); 9.45 1.H, NH); 10.60 (bs, iH, Nli).

ESI MS: in/z 307 (100, -43 N- (5-bromo-1, 3-thiazol-2-yl) (3-nitro-phenyl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl) (3-nitro-phenyl) -urea; N- (5-cyclopropyl-1, 3-thiazoil-2-yl) (3-nitro-phenyl) -urea; isopropyl 3 -thiazol 2-yl) -N'-benzyl -urea 1 H- NNR (400 NIHz-DMSO-d,) 8 ppm: 1.21 6H, J=6.8, CH 3CHCa) 3. 03 (in, 1H, CHCHCH 3 4.31 2H, J=6.35, CH,); 6.96 (in, 1H, NH-CH,) 7.27 (mn, 5H, phenyl).

ESI in/z 276 (100, N- (5-broxno-1, 3-thiazol-2-yl) -N -benzyl-urea; N- (5-phenyl-1, 3-thiazol-2-yl) -N -benzyl-urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) -N -benzyl-urea; N- (5-isopropyl-1, 3-thiazol-2-yl) -N (pyrid-3-yl) -urea; N- (5-broino-1, 3-thiazol-2-yl) -N (pyrid-3-yl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl) (pyrid-3-yl) -urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) -N -(pyrid-3-yl) -urea; N- (5-bromo-1, 3-thiazol-2-yl) (pyrid-4-yl) -urea; N- (5-isopropyl-1, 3-thiazol-2-yl) (pyrid-4-yl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl) (pyrid-4-yl) -urea; N- (5-cyclopropyl-1, 3-thiazol-2-yl) (pyrid-4-yl) -urea; N- (5-isopropyl-1, 3-thiazol-2-yl) (pyrid-2-yl) -urea; N- (5-brorno-1, 3-thiazol-2-yl) -N -(pyrid-2-yl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl) (pyrid-2-yl) -urea; N- (5-cyclopropyl-1, 3-thiazol-2-y1) -N -(pyrid-2-yl) -urea; N- (5-isopropyl-1, 3-thiazol-2-yl) -N (benzothiophen-2-yl) urea; N- (5-bromo-1, 3-thiazol-2-yl) -N (benzothiophen-2-yl) -urea; N- (5-phenyl-1, 3-thiazol-2-yl) (benzothiophen-2-yl) -urea; and N- (5-cyclopropyl-1, 3-thiazol-2-yl) (benzothiophen-2-yl) urea.

EXAMPLE 6 Preparation of a compound of formula isopropyl-1, 3-thiazol-2-ylcarbanate To a solution of 4 g (28.13 iniol) of 5- isopropyl-2 -amino- 1,3-thiazole in 30 ml of anhydrous dichioromethane 5.7 g (23.13 inmol) of 4-nitrophenyl chiorofornate were added clropwise at 0 0 C under nitrogen. Then 2.3 ml of pyridine -44 were added. The mixture was maintained at room temperature under stirring overnight and then 'filtered, giving 6.96 g yield) of the title compound as a white solid.

m.p. 157-159 0

C

NNR (400 MHz-DMSO-d,) 6ppm: 1.23 6H, J=6.8, CHCHCH.); 3.06 (in, 1H, CH 3 CHCH,); 7.05 1H, H thiazole); 2H, J=9.2, H-3,5'-phenyl); 8.10 2H, J=9.2,

H-

2 ,6'-phenyl); 11.00 (bs, 1H, NH).

EI-MS: m/z 307 m/z 168 ((CH3) 2 -CH-thiazole-NCO)..

m/z 153 (100, (CH 3 -CH-thiazoe-NCO)*'); m/z 139 (45, (OH-C 6 EXAMPLE 7 Preparation of a compound of formula 1, 3 -thiazol-2y) (3..iodophenvI)ue 1 g (3.25 minol) of 4 -nitropheny15isopropy-1 3 thil- 2 ylcarbamate and 0.39 ml (3.25 mmol) of 3 -iodoaniline were suspended under argon in 25 ml of acetonitrile. After 2 hours at 70 0 C the resulting solution was cooled, giving rise 0.923 g of the title compound, recrystallized from a mixture of diethylether/pentane 1/1.

m.p. 160-1621C 1H- NMR (300 NHz-DMSO-d,) 6ppm: 1.23 6H, J=6.8, CHCHCH,); 3.05 (mi, 1H, CH 3 CHCHJ); 7.03 lH, J=0. 8, H thiazole) 7.07 1H, J=8.0, H-S -phenyl) 7.35 (in, 2H, H- 4,6-phenyl); 8.00 1H, J=1.8, 1.8, H-2'-phenyl); 9.06 (bs, 1H, NH); 10.50 (bs, 1H, NH).

ESI(+)-MS: m/z 388 (100, By analogous procedure but employing 2[2 pr~yyaiomty~eznsloaie U isopropyl1l3-thiazol.2-yl)aminjflca]bonyl(2prpnlannlehlbneeufnmd can be prepared.

m-p. 90-92 0

C

'H-NNR (400 MHz-DMSO) 8 ppm: 1.19 6H, J=6.8, CH 3CHCH,) 2.93 (mn, 1H, 3.13 (mn, 1H, CH 3 CHCH,); 4.18, 5.08 (2m, 4H, CH 2 Ph CH 2 C=C) 6.89 1H, H-thiazole); 7.22 1H, H-3 -phenyl); 7. 41, 7. 53 (2m, 2H, H-5. H-4 -phenyl) 7. 86 (in, 1H, H-6'-phenyl) 11.90 (bs, 1H, NHI) ESI(+)-MS: m/z 415 (100, m/z 393 (50, By analogous procedure but employing lH-benzimidazol-6amine, N- (1H-benziiidazol-5-yl)N (5-isopropyl-1, 3-thiazol.

2-yl)urea can be obtained.

I H- NMR (400 MHz-DMSO-d,) 6ppm: 1.27 6H, J=6.8, CH 3 CHCHJ); 3. 09 (in, 1H, CHCHECH,) 7. 01 1H, H- thiazole) 7.13 1H, H-6'-benzimidazole) ;7.49 Cd, IH, H-7 benzimidazole) 7. 81 1H, H-4 -benzimidazole) 03 (s, lH, H-2 -benzimidazole) ESI -MS: m/z 302 (100, (M-iH)) By analogous procedure but employing lH-indole-6-amine,

N-

(l-no--l--5iorpl13tiz'--lue can be prepared.

I H- NNR (400 M~z-DMSO-d,) ppm: 1.24 6H, J=6.8, CH 3 CHCH,); 3.06 1H, CH 3CHCH,) 7. 03 (bs, 1H, H thiazole); 6.33 (in, 1H, H-3'-indole) 6.84 1H, J=8.3, H-S -indole); 7.23 1H, J=2.4, 2.4, H-2 -indole) 7.42 1H, J=8.3,H- 4 -indole); 7. 77 1H, H-7 -indole); 8. 82 Cs, 1H, NH); 10.18 (bs, 1H, NH); 10.95 Cs, 1H, NH-indole).

ESI -MS: rn/z, 301 (100, By analogous procedure but employing lH-indole-5-amine,

N-

can be prepared.

IH- NMR (400 I4Hz-DMSO-d 6 6ppm: 1.24 6H, J=6.8, CH 3CHCI); 3.06 Cm, 1H, CH 3CHCH 3 7. 02 Cs, 1H, H thiazole) 6.35 Cm, 1H, H-3'-indole) 7.05 (dd, 1H, J=2.0, J=8.5, H-6'indole) 7.30 Cm, 2H, H-7'-indole) 7.67 Cd, 1H,

J=

2 .0,H-4'-indole); 8.68 Cs, 1H, NH); 10.15 Cs, 1H, NH); 10.98 Cs, 1H, NH-indole).

ESIC+)-MS: m/z 301 (100, -46- By analogous procedure but employing imidazo[l,2-a]pyridin- 2 -ylmethanamide, N-(imidazoll,2-a]pyridin-2-yl-methyl)-N (5-isopropyl-1, 3 -thiazol-2-yl)urea can be prepared.

H- NMR (400 MHz-DMSO-d,) 5 ppm: 1.21 6H, J=6.8,

CH

3 CHCH); 3.04 1H, CH 3 CHCH,); 4.40 2H, J=5.6,

CH

2 );6.96 lH, J=1.2, H thiazole); 6.84 (dt, 1H,J=2.2, 6.8, H-6'-imidazopyridine); 7.20 1H, imidazopyridine); 7.47 1H, H-7'-imidazopyridine); 7.78 1H, H-3 -imidazopyridine); 8.49 1H, H-4'imidazopyridine); 7.01 1H, J=5.4, NH-CHJ); 10.23 (bs, 1H, NH-CO).

ESI(+)-MS: m/z 316 (100, m/z 338 (85, By analogous procedure but employing 1-methyl-2-[(2aminophenoxy)methyl]1H-imidazole, N-(5-isopropyl-1,3thiazol-2-yl)-N-{2-Cl-methyl-H-imidazol-2yl)methoxy]phenyl}urea can be prepared.

H- NMR (300 MHz-DMSO-ds) 8 ppm: 1.23 6H, J=6.8,

CH

3 CHCH); 3.05 1H, CH 3 CHCH3); 3.70 3H, N-CH 3 5.21 2H, CH2);6.92 (bs, 1H, H thiazole); 6.90-8.20 6H, imidazole+phenyl); 8.10 (bs, IH, NH); 10.96 1H, NH).

ESI(+)-MS: m/z 372 (95, m/z 410 (100, By analogous procedure but employing 2-(2aminophenoxy)acetamide, N-(5-isopropyl-1, 3 -thiazol-2-yl)-N 2 -phenoxyacetamido)urea can be prepared.

NMR (400 MHz-DMSO-d,) 8 ppm: 1.24 6H, CH CHCH,); 3.07 1H, CH3CHCH,); 4.50 2H, 7.05 (d, 1H, J=1.0, H thiazole); 6.50-7.00 3H, phenyl); 8.10 (m, iH, phenyl), 7.55 2H, NH 2 8.67 (bs, 1H, NH); 10.86 (s, 1H, NH).

ESI(+)-MS: m/z 335 (50, 373 (100, By analogous procedure but employing 2 S)-2-amino-2phenylethanamide, N-(5-isopropyl-1,3-thiazol-2-yl)-N- phenylglicinamido]urea can be prepared.

1 H- NMR (300 MHz-DMSO-d,) 8 ppm: 1.19 6H, J=6.8, CH CHCHI); 3.01 1H, CH CHCH); 5.26 1H, J=7.7

CH);

6.95 1H, H-thiazole); 7.20-7.60 6H, NH-CH+phenyl); 7.20-7-80 2H, NH 2 10.26 (bs, 1H, NH).

-47- ESI(+)-MS: m/z 319 (25, 357 (100, By analogous procedure but employing 2 R)-2-amino-2phenylethanamide, N-(5-isopropyl-1,3-thiazol-2-y)-N- phenylglicinamido]urea can be prepared.

NMR (400 MHz-DMSO-d,) 8 ppm: 1.19 6H,

CH

3 CHCH 3. 01 1H, CH CHCH) 5. 2 6 1H, J=7. 6 CH) 6.95 1H, J=1.3, H thiazole); 7.20-7.50 6H, NH- CH+phenyl); 7.21-7.79 2H, NH 2 10.20 (bs, 1H, NH).

ESI(+)-MS: m/z 319 (100, 357 (65, By analogous procedure but employing 2 -aminophenol, N-(2hydroxyphenyl)-N-(5-isopropyl-1, 3 -thiazol-2-yl)urea can be prepared.

m.p. 204-2060C H- NMR (400 MHz-DMSO-d) 6 ppm: 1.23 6H, J=6.8, CH3CHCH); 3.06 1H, CH3CHCH,); 7.02 1H, H-thiazole); 6.74 1H, H-5 -phenyl); 6.82 2H, H-3 ,H-4 -phenyl); 7.98 1H, J=7.6, H-6 -phenyl); 8.60 (bs, 1H, NH); 10.0 (bs, 1H, NH); 10.80 (bs, 1H, OH).

ESI(+)-MS: m/z 278 (100, By analogous procedure but employing 3 -aminophenol, N-(3hydroxyphenyl)-N-(5-isopropyl-1,3-thiazol-2-yl)urea can be prepared.

m.p.185-187 0

C

H- NMR (400 MHz-DMSO-d') 6 ppm: 1.23 6H, J=6.8, CH3CHCH); 3.05 1H, CH CHCH,); 7.03 3H, H-thiazole H-2 ,H-5 -phenyl) 6.39 2H, J=8.0, H-4 -phenyl) 6.77 (d, 2H, J=8.0, H-6 -phenyl); 8.81 1H, NH); 9.37 1H, NH).

ESI(+)-MS: m/z 278 (100, By analogous procedure but employing 4 -aminophenol, N-(4hydroxyphenyl)-N'-(5-isopropyl-1,3-thiazol-2-yl)urea can be prepared.

m.p.130-1320C 1 H- NMR (400 MHz-DMSO-d) 6 ppm: 1.23 6H, J=6.8, CH CHCHI); 3.05 1H, CH 3CHCH); 7.00 1H, H-thiazole); 6.68 2H, J=8.8, H-3 H-5 -phenyl); 7.21 2H, J=8.8, H-2 ,H-6 -phenyl); 8.60 1H, NH); 9.14 1H, NH); 10.18 (bs, 1H, OH).

-48- ESI(+)-MS: in/z 278 (100, By analogous procedure but employing 2 R) -2-aiino-2-phenyll-ethanol, N- 2 -hydroxy-l.phenylethyl]-N' -(S-isopropylli 3 -thiazol-2-yl)urea can be prepared.

NNR (400 NHz-DMSO-d) 8S ppm: 1.20 6H, CH 3 CHCH,); 3.-01 (mn, 1W. CH 3CHCH 3 3.60 (in, 2H, CH 2 4.73 (in, 1H, CH); 5.00 1H, J=5.1, 5.1, OH); 6.95 1H, J=1.1, H thiazole); 7.10-7-40 (mn, 6H, NH-CH+phenyl), 10.15 lH,

NH)-

ESI( in/z 306 (100, (M By analogous procedure but employing 2

S)-

2 -amino-2-pheny>- I-ethanol, 2 -hydroxy-1-phenylethyl]-N 1, 3 -thiazol-2-yl)urea can be prepared.

IH- NNR (400 MHz-DMSO-d,) (S ppm: 1.19 6H, J=6.9, CH 3 CHCH.) 3. 01 (mn, 1H, CH3CHCH,); 3.59 (mn, 2H, 4.73 (mn, 1H1, CH); 5. 02 1H, J=5.1, 5. 1, OH) 6.95 lH, J=0. 7, H thiazole); 7.20-7.40 (mn, 6H, NHI-CH+phenyl), 10.17 lH,

NH).

ESI(-i)-MS: inz 306 (100, EXAMPLE 8 Preparation of a compound of formula N-3-(3-hydroxy.

1-butynyl)Pheny11 5 -isoprO~y-1,3-thiazol..2.vl)urea To a solution of 0.2 g (0.56 minol) of N-(5-isopropyl1l> thiazol2yl)-N-(3iodophenl)ue in 3 ml of anhydrous N,N-dimethylformamide 0.6 ml of te tramethylguani dine 0.088 ml (1.126 inmol) of D,L-1-butyn3.ol, 19 mng (0.027 mniol) of bis(trphnylhophie)pallum (II) dhydrochloride and 5.8 mrg (0.03 inmol) of rarneous iodide under argon were added successively. After 5 hours water was added and the mixture extracted with ethylacetate. The organic layer was washed with brine, dried over sodium sulfate and evaporated, giving 0.116 g of the title compound as a yellowish solid.

m.p. 71-730C NHR (400 MHz-DMSO-d,) (Sppm: 1.24 6H, J=6.9, CH CHCH.) 3.06 1H, CH 3 CHCH') 1.37 3H, J=6.6, CH 3 ;4.57 (in, 1H, CH); 5.43 lH, J=5.1, 7.03 1H, 49 H thiazole) 7. 02 1H, H-4'-phenyl) ;7.27 1H, 8.0, H-5'-phenyl); 7.34 lH, J=8.0, H-6'-phenyl); 7.6.5 1H, H-2-phenyl); 8.02 1H, NH); 10.40 (bs, 1H, NH) ES -MS: m/ z 3 30 (10 0, By analogous procedure and by starting from N,N-dimethyl-2propyl-1-amine, (dimethylamino) -l-propynyllphenyl} N 5 -isopropyl-l,3-thiazo12-yl)urea can be prepared; NMR (400 MHz-DMSO-d,) 8 ppm: 1.23 (di, 6H, j=6.8, CH 3CHCH,); 3. 05 (in, lH, CH 3CHCH 3 2.23 6H, 3.44 2H, CH 2 7.03 1H, H-thiazole); 7.05 (di, 1H, J=7.8, H-4-phenyl) ;7.27 1H, J=7.8,7.8, H-5 -phenyl) 7.36 (d, 1H, J=7.8, H-6-phenyl); 7.64 lH, H-2 -phenyl); 9. 04 (bs, 1H, NH); 10.45 (bs, 1H, NH)- ESI(+)-NS: m/z 343 (100, By analogous procedure and by starting from 3-methoxy-lpropyne, N- 3 -methoxy-l-propynyl]phenyl] (S-isopropyll, 3 -thiazol-2-yl)urea can be prepared; IH- NNR (400 MHz-DMSO-d6) 8 PPM: 1.23 6H, j=6.8, CH 3

CHCH

1 ;3.05 (in, lH, CH 3CHCHJ); 3. 32 3 H, CH 3 4.31 (s, 2H, ClHI 2 7.03 1H, H-thiazole) 7.08 1H, J=8.3, H- 4 -phenyl) 29 1H, J= 8.3, 8.3, H- 5 -phenyl); 7. 39 (d, 1H, J= 8. 3, H- 6-phenyl) 7. 67 1H, H 2-phenyl); 9. 03 (s, 1H, NH); 10.40 (bs, 1H, NH).

ESI -MS: m/z 330 (100, EXAMPLE 9 Preparation of a compound of formula N-(5-3sopropyl- 1. 3 -t-hiazol-2-l)N'..( 3 -aminophenyl)urea A mixture of 1.55 g (5.05 mmol) of (5-isopropyl-l,3thiazol-2-yl) 3 -nitrophenyl)urea prepared as described in example 5 and 0.98 g ((17.7 minol) of iron dust with 2.02 M1 (35.35 iniol) of glacial acetic acid in 50 m.1 of ethanol was stirred at reflux under argon atmosphere. After 5 hours 1 of water was added and the product extracted with ethylacetate. The organic layer was washed with brine, dried over sodium sulfate and evaporated. The residue was finally purified by chromatography on a silica gel column (chloroform/methanol 47/3) giving 0.84 g of the title compound as a white solid.

m.p. 113-115 0

C

H- NMR (400 MHz-DMSO-d 6 ppm: 1.23 6H, J=6.8, CH3CHCH,) 3.05 IH, CH CHCH,); 5.07 2H, 7.02 (s, 1H, H-thiazole); 6.20 (dd, IH, J=2.0, 7.8, H-4 -phenyl);6.52 (dd, 1H, J=1.5, 8.3, H-6'-phenyl); 6.76 (bs, 1H, H-2phenyl) 6.89 1H, J=8.3, 8.3, H-5 -phenyl); 8.61 1H, NH); 10.13 (bs, 1H, NH).

ESI(+)-MS: m/z 277 (100, By analogous procedure and by starting respectively from N- (5-isopropyl-1,3-thiazol-2-yl)-N-(2-nitrophenyl)urea and N- (5-isopropyl-l,3-thiazol-2-yl)-N'-(4-nitrophenyl)urea, the following compounds can be prepared: N-(5-isopropyl-l,3-thiazol-2-yl)-N -(2-aminophenyl)urea; N-(5-isopropyl-l,3-thiazol-2-yl)-N- (4-aminophenyl)urea; IH- NMR (400 MHz-DMSO-d,) 6 ppm: 1.22 6H, J=6.8, CH CHCH,); 3.04 1H, CH CHCH,); 4.83 2H, NH 2 6.99 (s, 1H, H-thiazole); 6.50 2H, J=8.7, H-5 -phenyl); 7.05 2H, J=8.7, H-2 H-6 -phenyl) 8.42 1H, NH); 10.09 (bs, 1H, NH).

ESI(+)-MS: m/z 277 (100, Again by analogous procedure, and by starting respectively from 6-nitro-lH-indole and from 6 -nitro-lH-benzimidazole, 1H-indol-6-amine and 1H-benzimidazol-6-amine can be prepared.

EXAMPLE Preparation of a compound of formula isouropyl-.l3-thiaol-2-yl)aminolphenyllmethanesulfonamide 0.2 g (0.724 mmol) of N-(5-isopropyl-1,3-thiazol-2-yl)-N- 3 -aminophenyl)urea were dissolved in 10 ml of absolute -51 ethanol and 0.2 g 95mmol) of potassium hydrogen carbonate and 124.3 mg (1.0855 mmol) of methanesulfonylchloride were added successively. The mixture was maintained at 800C under argon for 7 hours and then evaporated. The residue was partitioned between water and dichioromethane. The organic layer was then dried over sodium sulfate and afforded, after concentration and cooling, 104 mg of the title compound as a white solid.

m.p. 246-248 0

C

1'H- NNR (400 MHz-DMSO-d) ppm: 1.23 6H, J=6.8, CH,CHCH,) 3.06 (in, 1H, CH 3CHCH,); 2 .9 7 3 H, 7. 03 (s, 1H, H-thiazole); 6.84 lH, J=6.8, H- 6-phenyl); 7. 19 (in, 2H, H-4 H-5 -phenyl) 7.39 1IH H-2 -phenyl); 9. 00 (s, 1H, NH); 9. 72 (bs, 1H, NH) 10. 18 (bs, TH, NHSOJ.

ESI m/z 355 (100, EXAMPLE 11 Preparation of a compound of formula 5 -isoproyl-1,3-thiazo..2- YI)aminolcarbonvl1amino)anilinolacetamide To a solution of 0.2 g (0.724 inmol) of N-(5--isopropyl--l.3thiazol -2--yl)N aminophenyl) urea in 2 ml of N,Ndime thyl formami de, 100 mng (0.724 inmol) of 2 -bromoacetamide and 108.6 mg (1.95 minol) of potassium hydrogencarbonate were added successively. The mixture was maintained 8 hours at 40 0 C under argon, then poured into water and extracted with dichloromethane. The organic layer was then washed with brine, dried over sodium sulfate and concentrated to give, after cooling, 160 mng of the title compound.

m-p. 133-135 0

C

IH- NMR (400 MHz-DMSO-d) ppm: 1.23 6H, J=6.8,

CH

3 CHCH9) 3. 06 (mn, lH, CHCHCH,) 3 .54 2H, J=5.4, CHJ) 7 .02 lH, H-thiazole) 5.88 (in, 1H, NI-CH,) 6.21 1H, J=7-8, H-4'-phenyl) 6.65 1H, J=7.8 H-6'-phenyl); 6.69 1H, H-2'-phenyl); 6.98 1H, J=7.8, 7.8, phenyl);.8.7l 1H, NH); 10.11 1H, NH); 7.08, 7.29 2H1, NHJ -52- ESI(+)-MS: m/z 334 (100, EXAMPLE 12 Preparation of (2R)-2-amino-2-phenylethanamide 3.025 g (15 mmol) of 2 R)-2-amino-2-phenylethanoate hydrochloride were suspended in 45 ml of dioxane and 45 ml of aqueous ammonium hydrate were added. After 8 hours at room temperature under stirring the solvent was evaporated and the residue redissolved with chloroform and washed with water. The organic layer was concentrated to afford 1.7 g of the title compound as a white solid.

By analogous procedure and by starting from 2 S)-2-amino-2phenylethanoate, (2S)-2-amino-2-phenylethanamide can be prepared.

EXAMPLE 13 Preparation of 1-methyl-2-[ 2 -nitrophenoxy)methyl -1Himidazole A solution of 1.92 g (11.97 mmol) of o-nitrophenol sodium salt, 3.8 g (35.9 mmol) of sodium carbonate, 2 g (11.97 mmol) of 1-methyl-2-chloromethylimidazole hydrochloride in ml of, N,N-dimethylformamide were heated at 500C for 2 hours. The mixture was then poured into water and extracted with ethylacetate. The organic layer was washed with brine, dried over sodium sulfate and evaporated, affording 1.17 g of the title compound, recrystallized from diethylether.

m.p. 172-1740C 'H-NMR (400 MHz-DMSO-d,) 6 ppm: 3.67 3H, 5.34 (s, 2H, OCH 2 6.86 1H, H-4-imidazole); 7.13 1H, H-6phenyl); 7.19 1H, H-5-imidazole); 7.60 1H, H-3 phenyl).

ESI(+)MS: m/z 234 (100, By analogous procedure and by starting from 2chloroacetamide, 2 2 -nitrophenoxy)acetamide can be prepared.

m.p. 190-1920C I I I 53 H-NMR (400 MHz-DMSO-d,) 8 ppm: 4.65 2H, CH 2 7.14 (ddd, 1H, J=1.0, 7.5, 7.9, 7.22 (dd, 1H, J=1.0, H-6); 7.32, 7.47 (2bs, 2H, CONH,); 7.64 (ddd, J=1.5, 7.5, 8.7, H- 7.90 (dd, 1H, J=1.5, 7.9, H-3).

ESI(+)MS: m/z 197 (100, EXAMPLE 14 Preparation of 1-methyl-2- 2 -aminophenoxy)methyl -1Himidazole A solution of 1.13 g of l-methyl-2-[(2nitrophenoxy)methyl]-iH-imidazole in 70 ml of methanol with 0.14 g of palladium on charcoal 10 was hydrogenated at psi for 6 hours at room temperature. The catalyst was then separated by filtration and the solvent evaporated. The residue was finally purified by chromatography on a silica gel column (eluent: chloroform-methanol 48/2) giving rise 0.856 g of the title compound as a red oil.

H-NMR (400 MHz-DMSO-d,) 6 ppm: 3.72 3H, 3.80 (bs, 2H, NH,) 5.15 2H, H-3 H-4-phenyl) 6.81 1H, phenyl); 6.90 1H, H-4-imidazole); 7.02 2H, H-6phenyl ESI(+)MS: m/z 204 (100, By analogous procedure and by starting from 2-(2nitrophenoxy)acetamide, 2-( 2 -aminophenoxy)acetamide can be prepared.

m.p. 114-116 0

C

H-NMR(400 MHz-DMSO-d,) 8 ppm: 4.30 2H, CHCO); 5.03 (s, 2H, 6.45 IH, 6.61 1H, 6.67

IH,

6.72 1H, 7.45 1H, CONH); 7.73 1H,

CONH

ESI(+)MS: m/z 167 (100, EXAMPLE Preparation of 2 -(imidazo[l,2-alpyridin-2-ylmethvl)-lHisoindole-i, 3 (2H)-dione 54 4 g (0.024 mol) of 2 -(chloromethyl)imidazo[12a~pyridine were dissolved in 140 ml of N,N-dimethylformamide and 4.81 g (0.026 mol) of potassium ftalimide were added portionwise. The mixture was heated at 60 0 C for 20 hours.

The precipitate was filtered, washed with water, diethylether and finally tetrahydrofuran, affording 4.8 g of the title compound.

m.p. 230-232 0

C

H-NNR (400 M~lz-DMSO-d,) 6 ppm: 4.88 2H, CH 2 6.82 (in, 1H, H- 6 -imidazopyridine); 7.17 (mn, 1H, imidazopyridine); 7.44 (in, 1H, H- 7 imidazopyridine); 7.88 (in, 4H, H-phenyl); 8.42 (mn, 1H, H- 4 iidazopyri dine).

ESI(+)MS: m/z 278 (100, EXAMPLE 16 Preparation of imidazoEl. 2 -alpyridin-2-vlmethanamine A solution of 1.37 g (4.94 mmol) of 2-(imidazo[l,2alpyridin-2-ylmethyl)l19isoindole-l 3 (2H)-dione in 14 ml of hydrazine hydrate 98 and 1 ml of ethanol- Was stirred at room temperature for an hour. The mixture was then poured into 25 ml of sodium hydroxide 35 and extracted with dichloromethane. The organic layer was dried over anhydrous sodium sulfate and evaporated to give 0.426 g of the title compound crystallized from diethylether.

in.p. 91-93 0

C

IH-NMR (400 MHz-DMSO-d)6 ppm: 1.-9 8 (bs, 2 H, NH,) 3. 78 (s, 2H, CH 2 6.80 (mn, 1H, H-6) 7.15 (mn, 1H, H-5) 7.41 (in, 1H, 7.73 1H, 8.46 (in, 1H, H-4).

ESI(+)MS: m/z 148 (100, EXAMPLE 17 Preparation of the oymer supported compound

(VIII)

A solution of 8.72 g (69.1 iniol) of 4 -mercaptophenol in ml of dry N,N-diinethylforinamide was added dropwise to a solution of 7.76 g (69.1 iniol) of potassium t-butoxyde in 120 ml of the same solvent, under argon atmosphere, at 5 0

C,

over a period of 20 minutes. 25 g (19.75 inmol) of the Merrifield resin (VII) (Novabiochem loading 0.79 mmol/g) was added to the solution and the temperature was kept to The mixture was gently stirred at 60 0 C for 18 hours and at 220C for 24 hours. The resin was then filtered, washed with N,N-dimethylformamide, dichloromethane, methanol and evaporated. The loading of 4 -mercaptophenol on the resin was calculated from the percentage of sulfur determined via microanalysis: S 2.64 loading 0.755 mmol S/g. The presence of OH group was confirmed via DRIFTS (broad strong band 3180-3520 nm).

EXAMPLE 18 Preparation of the polymer supported compound

(IX)

7.98 g (39.6 mmol) of 4 -nitrophenylchloroformate and 4.35 ml (39.6 mmol) of N-methylmorpholine were added to 24 g (19.8 mmol) of the polymer supported compound

(VIII)

swelled in 200 ml of dichloromethane under argon atmosphere. The mixture was stirred at 221C for 22 hours.

The obtained compound (IX) was filtered, washed with dichloromethane, methanol and evaporated under vacuum. The loading of 4 -nitro-phenylchloroformate on the resin was calculated from the percentage of sulfur determined via microanalysis: S 2.34 loading 0.731 mmol S/g. The disappearance of the OH band (broad strong band 3400 rnm) and the appearance of carbonate group were monitored via DRIFTS (strong band 1785 nm).

EXAMPLE 19 Preparation of a polymer supported compounds

(X)

A solution of 2 -amino-5-isopropyl-l,3-thiazole (39.6 mmol) in 12.5 ml of dichloromethane was added to the polymer supported compound (IX) (19.8 mmol) swelled in 200 ml of dichloromethane under argon atmosphere. The mixture was stirred at 22 0 C for 22 hours. The obtained compound was filtered, washed with dichloromethane, methanol and evaporated under vacuum. The loading of 2 isopropyl-1,3-thiazole on the resin was calculated from the percentage of sulfur determined via microanalysis: S 4.21 -56loading 0.724 rnrol S/g. The presence of carbamate group was confirmed via DRIFTS (strong band 1742 nm).

EXAMPLE Preparation vria parallel srnthenijs of tecompounds of formula

MI

The amines (0.236 mmol) and NN-diisopropylethylamin (0.236 mmol) were added to the polymer supported compounds (0.118 mmol) swelled in 3 ml of toluene in the Argonaut Quest 210 apparatus vessels. 128 mg (4 eg) of

N,N-

diisopropylethylamine resin bounded (PS-DIEA loading 3.68 mmol/g) was used whenever the amines were in the salified form The reactions were stirred for 22 hours at then the reaction mixtures were filtered and the resin washed with dichioromethane. The liquid phase, recovered in Climax test tubes, was evaporated under nitrogen flux at 351C using Liebisch Termochem Metal-block thermostat. The obtained crude products were triturated with diethyletherdichioromethane and the resulting solids were filtered on frit equipped syringes Ailtech extract-clean filter tubes ml, Alltech Teflon frits for 1.5 ml tubes) .The products were finally dried under vacuum.

Employing this procedure and using the suitable amine the following compounds can be prepared: N- (S-isopropyl-,-hizl2yl -orhln carboxamide; N- (5-isopropyll ,3-thiazol-2 1)1+ 4 -methylphenyl)urea; N- (5-isopropyll 3 -thiazol2yl)-N-( 3 -fluorophenyl)urea; N- (5iorpl1 -tizl2y)- 4 -cyanophenyl) urea; N- (5-isopropy1 3thiazol 2 l)N-( 3 -caohn ra N- (5-isopropyll1 3 -thiazol2yl)-N 6dirnethylphenyl) urea; N- (5-isopropy,3 thiazl 2 4 uroezl ra N- (5-isopropy>l 1 3- thiazol-2 1y) 3 -acetylphenyl) urea 2 H- NMR (400 MI-z-DMSO-d6) PPM: 1.24 6H-, J=7.

0 CH 3CHCH).; 3.06 (in, 1H,

CH

3 CHCH); 2.55 3H, COC-1 3 7.32 lH, J=7.6, H-5'-phenyl) 7.44 1H, Jr=7.9, phenyl); 7.5-7.8 (in, 2 H, H H-6'-phenyl) 8.08 1H, -57- H-2 -phenyl) 7.04 1H, H-thiazole) 9.2 (bs, 1H, CONphenyl); 10.5 (bs, 1H, NHCONHPh); N- (5-isopropyl-1, 3-thiazol-2 1) 4 -ace tylphenyl) urea; 3- ((II(5-isopropyl-1,3-thiazol-2yl) amino] carbonyl)amino)benzoic acid; N- (5-isopropy1, 1thiazo2y)N'-( 4 -ispoyhelura 3- (f f (5-isopropyl-1, 3-thjazol-2yl) amino] carbonyl }amino) benzamide NMR (400 MHz-DMYSO-d,) 5 ppm: 1.24 (di, 6H, J=6.8, CH3CHCH,); 3.05 (ept, 1H, J=6.8, CHCHCH,); 7.32 1H, J=7.6, H-S -phenyl); 7.35 1H, J=1.5, H-2-phenyl); 7.49 1H, J=7.6, H--6-phenyl); 7.62 (dd, 1H, J=7.6, 1.5, H-4phenyl) 7.04 1H, H-thiazole); 9.64 1H,

CONH-

phenyl); 10.36 1H, NHCONHPh); N- (S-isopropyl-1, 3thiazol.2 yl) -N 4 -methoxybenzyl) urea; N- (5-isopropy13-thiazol-2 1) -N 4 -butylphenyl) urea; N- (5-isopropyl-1, 3-thiazol-2-y1) -N (4tri fluoroinethyiphenyl )urea; N- (S-isopropyl-1, 3.thiazop2yl)-N 3 -bromophenyl) urea; N- (5-isopropy1-1, 3-thiazol-2-y1) -N (4cyclohexylphenyl) urea; N- (5-isopropy1 3thiazo 2 yl) 4peoxpe )ue NMR (400 M41z-DMSO-d,) Sppm: 1.24 6H, CH 3 CHC-H,); 3. 05 (in, 1H, CH 3 CHCH,); 6 .96 (in, 4H, H-3' H-5 phenyl, H-2 ,H-6-phenoxy); 7.02 1H, H-thiazole); 7.08 (mn, 1Hi, H-4-phenoxy); 7.35 (in, 2H, H-3, H-5-phenoxy); 7.47 (in, 2H, H1-2, H-6-phenyl); 8.95 (bs, 1H, CONJJ-phenyl); 10.3 (bs, 111, NHCONH); N- (5-isopropyl1,3thiazol.2-yl)-N.( 4 -benzyloxyphenyl)urea; N- (5-isopropy1.3thiazol 2 y) 5S-dime thylphenyl) urea 1H- NMR (300 MHz-DD4SO-d,) 5 ppm: 1.23 (di, 6H, J=6.8, CHiCHCH,); 3. 05 (ept, 1H1, J=6. 8, CH 3 CHCH,) 2.22 6H, 2 CHI); 6.65-7.06 (mn, 3H, H-phenyl); 7.02 1H1, H-thiazole); 6.71 1H, 11-phenyl); 6.72 1H1, H-phenyl); 8.75 (bs, 1H, CONH-phenyl); 10.3 (bs, 1H, NHCONH).

I

58 ESI(+)-MS: M/z 362 (100, N- (5-isopropyl-1, 3-thiazol-2-yl) 3dimethyiphenyl )urea; N- (5-isopropyl-1, 3-hiazo1..>yl) (3-mthox[1, lbiphenyl] 4 -yl) urea; N- (5-isopropyl-1, 3-thiazol-2-yl)- 3 ,4-dihydro-2 (1H) isoguinoline carboxarnide; N-benzyl-N -(5-isopropyl-1, 3-thiazol-2.y1) -N-methylurea; N- (5-isopropy-1, 3thiaz 2y) 7 dithox-,4dhdo 2 (11) -isoquinoline carboxamide IH- NMR (400 MHz-DNSO-d,) 6 ppm: 1.21 6H, j=6.4, CH3CHCHl 2.-9 9 (ep t, 11H, J= 6. 8, CHCCH 2. 7 (t 21H, J =5 CH.NCH,CH,); 3.68 211 J=5,5,

CH

2 NCHCH); 3.69 3H, OCH 3 3. 71 3H1, OCH,) 55 2H1, CH2NCH 2 CH) 6.97 (s, 1H1, 1-thiazole) 6.71 1H, H-phenyl) 6.72 1H, Hphenyl); 10.7 (bs, 1H1, NH).

ESI(+)-MS: m/z 362 (100, N- (5-isopropyl..1, 3thiazoi...2-yl) 3 -chloro-4-methyl) phenyl] urea; N- (5-isopropyl-1, 3-thiazol-2-y1) f (3-chloro-6methyl) phenyllIurea; N- (5-isopropyl-1, 3 -thiazol-2-y) -N dimethoxyphenyl )urea I'H- NMR (400 MHz-DNSO-d,) 6ppm: 1.24 6H, CHCHCH,); 3.07 (in, 111, J=7. 0, CH 3CHCH,); 3.68, 3.80 two s 6H1, 2-OCI); 7.04 J=1.0, lH, H-thiazole); 6.53 (dd, 1H1, J=3.0, 8.9, H-4'--phenyl); 6.93 111, J=8.9,H-3.phenyl); 7.79 1H, J=3.0, H-6'--phenyJ.); 8.7 (bs, 1H1, NLiPh); 10.9 (bs, 1H, NHCONHPh); N- (5-isopropyll1 3-thiazol-2-y1) 4dime thoxyphenyl )urea NM'R (400 NI~z-DMSO-d,) 6ppm: 1.23 6H1, CHCHCH,); 3. 05 (ept, 1H, J=7. 0, CH3CHCH,); 3.7 (s 3H, OCH); 3.73 3H OCH3) 7.02 1H-, H-thiazole) 6. 8-7.2 59 3H, H-phenyl); 8.-7 6 1Hi, NHCONHPh); 10. 2 lH, NlHCONHPh); N- (5-isopropyl-1, 3-thiazol-2-yl) 2 chioro) phenyl] urea; N- (5-isopropyl-1, 3-thiazol-2-yl) (2-chloro-4methoxyphenylj urea; N- (5-isopropyl-1, 3-thiazol-2-yl) dichiorophenyl )urea; N- 1 -biphenyl) 2 -yl] (5-isopropyl-1, 3-thiazol-2y1)urea; N-ethyl-N (5-isopropyl,3thiazo-2-l) -N-hnlur N- (f (5-isopropyl-1, 3-thiazol-2yl )aminojcarbonyllamino) 2 -methoxyphenyl]acetamjde; 2- (f f (5-isopropyl-i 3 -thiazol-2-yl) amino] carbonyl)amino)

-N-

phenylbenzamide; N- (5-isopropyl1 3thiazol2yl)-N (2morpholinophenyl )urea; N- (-isopropyl-1, 3-thiazol-2yl)arninoj carbonyl}amino)phenyl] -N-methyl acetamide NMR (400 MT~z-DISO-d,) 6 ppm: 1.22 6H, J=6.6, CH 3CHCH.)* 3.08 (in, Ili, CH 3 CHCH,) ;1.7 3 Cs, 3H, NCOCH'); 7.03 1H, H-thiazole) 3.09 3H, CH 3 NCOCH,); 7.23 (d, 2H, J=8.1, H-6, H-2 -phenyl); 7.51 2H, J=8-1, H-5,

H-

3 -phenyl); 9.1 Cbs, iH, NHCONHPh); 10.4 Cbs, 1H, NHCONH-Ph)- N- (2-f [cyclohexyl Crethyl)aminoliethyl)phe1)

-N'-CS-

isopropyl-1, 3 -thiazol-2-'yl)urea; N- 13- {[[C-isopropyl-1, 3-thiazol-2yl)aminojcarbonyllanino) 4 -methoxyphenyljlacetamjde; N- (5-isopropyl-1, 3-thiazoi-2-y1) 4 -methoxyphenyl) -1piperazine carboxamide; N- 2 -furylmethyl)-N-(S-isopropyll3-thiazol-2yl)ue IH- NNR (400 MHz-DMSO-d,) 6 ppm: 1.24 6H, J=6.8, CH 3 CHC-H); 2.99 (ept, 1H, J=6.8, CHCHCH,); 4.32 Cd, 2H, J=5.6, NHCH)2 6.26 11I, J=3, H-5 -furyl) 6.4 Cd, 'iH, J=3, H-4'--furyl); 6.98 Cs, 1H, H-thiazole) ;6.93 Ct, IHN, NiCH,); 7.59 1H, H-3-furyl); 10.19 (bs, 1H, NHCO).

IESI(+)-MS: m/z 266 (100, N- 4 -f luorophenyl) -N -(5-isopropy1, 1>thiazo-2-yl)ura N- 2 -methoxybenzyl)-N (5-isopropyl-1l 3 -thiazol-2..yl)urea; N- (5-isopropy1,3thiazo2yl)-N 2 -(1-ehlllyrl 2 -yl) ethyl] urea;, N- 3 4 -dimethoxybenzyl)-N- (5-isopropyl 3thiazol-2 yl) urea 1H- NMR (400 6~-MOd) pm 1.21 6H1,

CHCHCH

2 3. 01 (ept, 111, J=7.0, CH 3 CHCH,); 3.69 311, 0C11 3 3.72 311, OCH,); 4.22 2H, J=5.0, NHCH Ph); 6.8- 6.9 (in, 3H, H--phenyl); 6.96 111, H-thiazole); N- (5-isopropyl-1,3-thiazol-2-yl) 4 -oxo-1-phenyl1..13,8triazaspiro decane-8-carboxanide IH- NMR (400 MHz-DMSO-d6) 8 PPM: 1.23 6H1, j=6. 8, CH 3CHCHI); 3. 03 (ept, 1H, J=6.8, CHCHCH) 1.62 2H, J=13.6, H-3eq 5eq-piperi dine); 2.4 (td, 2H, J=13.6, 5.1, H-3 ax, H- 5ax-piperi dine); 3.46 2H, J=10..4,

H-

6ax, H- 2 ax-piperi dine); 4.14 (bd, 2H1, J=10.4, H*-6eq,

H-

2 eq-piperidine); 4.58 2H1, CONHCH NPh); 6.6-6.7 (mn, 311, H1-2, H-6, H-4 -phenyl); 7.14 2H, j=7.5, H1-3, phenyl);. 6.98 (bs, 111, H-thiazole) 8.75 (bs, 111, CONHiCH NPh); 10.85 (bs, 1H, thiazole-NHjCON); N- (5-isopropyl-1, 3-thiazol-2-yl) 4-dioxa-8azaspiro S]cecane-8-carboxainide; N- (5-isopropyl-1, 3 -thiazol-2-yi)-N (1piperidinyl) ethyl] urea; N- (5-isopropyl-1, 3 -thiazol-2-y1) -N (1inorpholinyl) ethyl] urea; 4- 4 -fluorophenyl) (5-isopropyl13-thiazol-2-y1)-1.piperazine carboxainide;

N-[

4 (4ch rophnyh 3eny1)3..ethzlyl N' 1, 3 -thiazo1-2-yl)urea; 4 -fluorophenyl) (hydroxyrethyllN.(-isopropyl1 3 thiazol-2-yl) -l-piperidine carboxamide; N- 3 -ethynylphenyl) 5 iiopol 1 3 -tizl2y~r N- 2 -rethoxy3f uorophenyl)N-(5-ispoy-,3tizl yl) urea; -61 N- (5-isopropyl-1, 3 -thiazol-2-yl)-N'- (4-oxo-1- Piperidinyl )urea; N- 3 -acetylaminophenyl)-N' (S-isopropyl1,3.thiazol-2 yl) urea;

N-[

3 2 -fury)lH.pyrazol5yl>-N.(5-isorpl13tiz 2 -yl)urea; N- f(4- [ethyl (isopropyl) amino] phenyl I N- (5-isopropyl1, 3thiazol-2-yl )urea; N- 3benzodi o-l) N 5-l)N'(Sil-,3tizl yl)urea; (f [I (5-isopropyl-1, 3 -thiazo1-2y) amino carbonyl)i) 1 phenyl -lH-pyrazole 4 -carboxamide; N- (5-isopropyl-1, 3thiazo1-2.yl) 4 -pyridinylmethyl) urea; N- (5-isopropy1 3thiazo2yl)-N 2 -prz ra n-l(5-isopropyl1,13-thiazol12.1) (5-hn -1 h,4 oxadiazoN2yl) urea; N- (5-isopropyl-1, 3 -thiazol-2-yl) 2 -oxo-2, 3-dihydro-lHbenzimidazo>1!yl) -l-piperidine carboxamide IH- N1qtR (400 MHz-DMSO-d,) 6 ppm: 1.23 6H, CH 3CHCH,) 3. 01 (ept, 1H, J=7.0, CH 3 CHCH); 1.69 (bd, 28, J=9.8, H-3eq,H-5eq-pperijfle); 2.21 (mn, 2H, H-3 ax,

H-

5'ax-piperi dine); 3.46 (bt, 2H, J=12.4, H-2 ax, H- 6ax- Piperidine) 4.14 (mn, 3H, H-2'eq, H-6'eq. H 4ax-piperi dine) (mn, 48, aromatics); 6.98 18, H-thiazole); 10.8 (bs, 2H, NHCONH);: N- 3 -benzothiazol6.yl) -N (5-isopropyP.1, 3-thiazol-2yl)urea IH- NMR (400 NHz-DMSO-d,) 6ppm: 1.24 6H, j=6.8, CR ,CHCH.); 3.05 (ept, 1H, J=6.8, CH 3

CHCH

3 7.5 (dd, 1H, J=8.8, 1.9, H-5*-benzothiazole); 7.98 18, J=8.8, H-4'benzothiazole); 8.38 1H, J=1.9, H-7'-benzothiazole) 9.22 2H, H-2'-benzothiazole NHCONHPh) 7.04 1H, Hthiazole); 10.41 1H, NHiCONIIPh); N- 3 -dimethyl-lH-pyrazo1 S5-yl) (5-isopropy>l1 3thiazo.-2.yl)urea; N- 3 -phenyl-...rethy118 -pyrazo15 1) thiazol-.2-yl) urea; I I 62 N- (5-isopropylp.1, 3 -thiazol-2-yl).3-hydroxy-lpprdin carboxamide; N- (5-isopropyl-1, 3-thiazol-2-yl) (2-methyl-i, 3-clioxo-2, 3urea; N- (5-isopropyl3thiazol2yl)- 4 bezllperin carboxamide; N- (5-isopropyl-1,3 -thiazol-2.yl) 4 -methyl-l.-piperazine carboxamide; 4-hydroxy-N- (5-isopropyl.1,3 -thiazol-2y)-lpiperidine carboxanmide; N- (5-isopropV3-thiaz 12-l) 3 zbicco32..o 3 -carboxamide; N-(5-isopropy>-1,3 -thiazol2y).4-(4acetylienl)piperazine carboxamide NMR (400 l4Hz-DMSO-d,) 6ppm: 1.21 6H,

CH

3 CHCH.) 2.99 (ept, lB. J=7.0, CH 3 CHCH). 2.44 3H-, CH3COPh); 3.29 (bt, 4H, 6'-piperazine) 3.63 (bt, 4H, Cl! 2 5-piperazine); 6.97 2H, J=9.2, phenyl); 7. 8 2H, J=9. 2, H- 2, 6 -phenyl) 6. 97 i1H, H-thiazole); 10.95 (bs, 1H, NHCON); 4- [bis 4 -tluorophenyl) (5-isopropyl-1,3-thiazol-2-yl) -1piperazine carboxamide; N- (S-isopropyl-1, 3-thiazol-2-y1)- 4 -oxo-2, 3,4, S-tetrahydro- 1H-1, S-benzodiazepinelcarboxamide N- (5-isoprop1 3thil 2 yl) 5 ,,8-erhdo naphtalenyl )urea;

N-(

4 -phenyl.2-.thiazoy) N -(5-ispoy-,3tizl yl.) urea; 4- 4 -fluorobenzoyl) (5-isopropyl-1, 3-thiazol-2-yl) -1piperidine carboxamide; N- (S-isopropyl.1, 3-thiazol-2.yl) 3-dihydro-2urea; N- (5-isopropyl 3-thiazol-2.yl) 2 -pyrimidinyl) -1piperazine carboxamide; N-(SisoproPYl113-thizl 2 yl)3o-,4dhro12 quinoxaline; N- (-is opyl-, 1-tiaol2hl)

N-

2 -nao-6y)ue I I 63 NMR (500 MHz-DMSO-d,) 6 ppm: 1.25 6H, J=6 .8, CH 3 CHCH,); 3. 07 (in, 18, CH CHiCH3) 6.94 (di, 1H, J=8.4, indazole); 7.65 1H, j=8.4, H-4'-indazole);.79 4 (in, 2H, H-3. H-7 -indazole) 7. 04 1H, H-thiazole); 9.12 (bs, 1H, CONH-indazole); 10.30 (bs, 1H, NH-thiazole); 12.87 (bs, 1H, NH-indazole).

ESI(+)-MS: mhz 302 (100, N- (5-isopropyl3thiazol2yl)-N 2 -chlorobenzyl)urea I H- NMR (500 MHz-DMSO-di) 8 ppm: 1.21 6H, J=6.9, CH CHCHI); 3. 03 (mn, 18, CH 3CHCH,); 4.38 2H, J=5.9,

CH,);

7.3-7.44 (mn, 4H, phenyl); 6.97 1H, J=0.9, H-thiazole); 7.10 (bs, 18, NHCH 2) 10.32 (bs, 1H, NH-thiazole).

ESTC4+)-MS: m/z 310 (100, N- (5-isopropyl-1, 3-thiazol-2-yl) 4dichlorobenzyl) urea; N- 5 -isopropyl-1, 3 -thiazo1y)N'(3fluorobzl) re IH- NMR (500 MHz-DMSO-d,) 6ppm: 1.21 6H, j=6.8, Cl- 3. 03 (in, 1H, CH CHCH); 4. 32 (di, 28, J=6. 1, CH,) 6.97 (di, 1H, J=0.9, H-thiazole); 7.0-7.4 (mn, 5H, phenyl NHCH,); 10.30 (bs, 18, NH-thiazole).

ESI(+)-MS: in/z 294 (100, N-(5-isopropy-13thiazo2yl)-N 3 4 -dichlorobenzyl)urea H- NMR (500 MHz-DMSO-d,) 6ppm: 1.21 (di, 68, J=6.7, CH CHCH.); 3.03 (in, 1H, CHCCH,); 4.30 2H, J=6.1,

CR

2 7.28 (dd, 1H, J=2.0, 8.2, H-6*-phenyl); 7.52 1H, H-2*-phenyl); 7.58 (di, 1H, J=8.2, 8-5'-phenyl); 6.97 1H, J=0.9, H-thiazole); 7.12 (bs, 18, NHCH,)2 10.'41 (bs, 18, NHthiazole).

ESI(+)-MS: m/z 143 (100, isopropylaminothiazole+H)*); mhz 344 (65, N- (5-isopropyl-1, 3 -thiazol-2-y1) 4 -difluorobenizyl)urea H- NMR (3 00 MHz -DMSO-di) 8 ppm: 1. 21 (di, 6H, J= 6. 7 CH CHCH) 3 .03 (mn, 1H, CH 3 CHCH)* 4.30 (di, 2H, J=6.0, 6.97 (di, 18, J=0.9, 8-thiazole); 7.0-7.4 (in, 4H, phenyl NHCH9); 10.20 (bs, 18H, NH-thiazole), BSI(+)-MS: mr/z 312 (100, 64 N- (5-isopropyl-1, 3-thiazol-2-y1) S-dif luorobenzyl) urea 1H- NMR (500 IvfHzDMSO-d,) 8 ppm: 1.21 6H, J=6.9

CH

3

CHCH.);

3.02 (mn, 1Hi, CH3CHC-,); 4.35 2H, J=5.8, 7.08 (in, 2H, H-3, H--5 -phenyl); 7.39 (mn, 1H, H-4 -phenyl) 6.95 (d, 1H, J=0.9, H-thiazole). 7. 04 (bs, 1H, NHCH2) 10.-08 (bs, 1H, NH-thiazole).

ESI(+)-NS: in/z 312 (100, N- (5-sopropy13thia o1y1 N26dif lrbezyur N- (5-isopropyl.1, 3-thiazol-2yl) -f 4 -hydroxy-3rethoxy)benzyllurea; N- (5-isopropy-1, thiazo1.-yl)N (5methl 2 -fu )re I'H- NMR (500 MHz-DMYSO-d,) 8 ppm: 1.21 6H, J=6.8, CHCHCH,); 3.03 (in, iH, CH,CHCH,); 2.21 3H, CHI,); 4.23 (d, 2H, J=5.8, CHI,); 5.97, 6.11 (2s, 2H, furane); 6.96 1H, J=1.0, H-thiazole); 6.91 (bs, 1H, NHCH2) 10.-14 (bs, 1H-, NHthiazole).

in/z 280 (100, N- (5-isopropyl1,3-thiazol-2-y) (4methylsulfonylbenzyl )urea; 2 R) 2 -hydroxy-2,3-dihydro~-j indeni1yl isopropyi-1, 3 -thiazoi-2-yl)urea; N- (5-isopropy-1, 3thiazo-2yl)-N 4 -chlorobenzyl)urea IH- NNR (500 I4Hz-DMSO-d,) 8 ppm: 1.21 6H, J=6.8, CH3CHCH.); 3.03 (mn, 1H, CH,CHCH,); 4.29 2H, J=6.1, CHi,); 7.3,7.37 (2d, 4H, J=8.5, phenyl); 6.97 1H, J=0.9,

H-

thiazole); 7.06 (bs, 1H, NHCH,) 10.30 (bs, 1H, Nthiazole).

ESI(+)-MS: m/z 310 (100, N- (S-isopropyl-1, 3-thiazol-2-yl) 2 -pyridinylmethyl)urea; N- (5-isopropy1 3thiazo21) 3 dirnethoxybenzyl) urea IH- NI4R (500 NSHz-DMSO-d,) 6ppm: 1.21 6H, J=6.8, CH CHCH,); 3. 03 (mn, 1H, CH3CH-CH,)3 4.24 2H,

CHO,)

3.71 6H, 2 OCH,); 6. 37 1H1, H-4 -phenyl) 6. 44 (s, 2H, H-6'-phenyl); 6.97 iH, H-thiazole); 6.99 (bs, lIH, NHCH,); 10.22 (bs, 1H, NH-thiazole).

ESI( in/z 336 (100, N- (5isoproPYl-,3-thiazol- 2 yl q- 3 -PYridinylnethyl)urea; N 5 -i o p o p y -1 ,3 h i a o l -y 4 t r i f lu o r o b e n z y l u r a N- (S-isopropYI 1, 3 -thiazo>l-2 '1~(34s trimethoxybenzyl) urea 3 111 NMR (300 l 4 Uz-DMSOci6) 6PPM: 1.21 6H, J=6.8, CH 3 CHCH); 3.03 (in, IH, CHCHCH 4.24 (di, 2H-, J=5.

9 CHR 2 3.60, 3.65 (3s, 9H-, 3 OCHJ); 6. 60 2H-, Phenyl) 6. 97 (s, 1H, H-~thiazole) 6.99 (bs, 1H, NHC-) 102 b, 1i

H

HN-

JESI(+)-MS. m/z 366 (100, n/z 181

(H

C

7 H1 4 ;(10 (C 03 N- (S-isopropy1 1 3 -thiazol> 2 4diinethoxybenzyl) urea H- NMR (300 DIRz-1ThSOd6) 6PPM: 1.21 (ci, 6H, J=6.8f CI-ICHCH).; 3 .03 1H, CH CHCH) 4. 24 2H-, J=5. 9 CH 2 3.70, 3.78 (2s, 6H, 2 OCR3) 6.48 (dci, 1H, 6.52 (di, li, H-3'-pheny1); 7.05 (di, IN, H-6'-pheniy1) 6.97 1H-, H-thiazOle); 6.80 (bs, 1H, NHCR); 10.10 (bs, IH-, NH-thiazole) SI(+)NMS: m/z 336 (100, N- 5 -isopropyj 1, 3 -thiazo1- 2 (4diiiethylaininobeny) urea; N- (5-isopropyj 1, 3 -thiazo>- 2 dimethoxybenzyl) urea; N- (S-isopropyl- 1 3 -thiaz-o1.

2 -N-fr 2 -chloro-6 i- Phenoxy) berizyl iiurea; 1 3 -tizj2y N-(iR, 2 S)-2-hyroy 2 3 dihydroHincii -y1 Iurea; N iso rop l,1 3 -thiazo1 2 y 1 I 3 -hycroxy 4 methyl )phenyl Iurea; N S i s o p r o p y l 13 -t i z l 2 y 4 I e z m d z l 2 YI)phenyljurea; N- (5-isopropy 1 3 -t i z l 2 y 3 p e y H p r z l yl )urea;Yao- 3 5 N 5 -i s o p r o p li i h a o l 2 y e h l 6 cruinOlin 1 urea 66 NNR (500 MHz-DMSO-d,) 8 ppm: 1.25 6H1, J=6. 8, CH 3 CHCH,); 3.07 (mn, 1H, CHCHCH,) 2 .61 3H, 7.05 (s, 111, H-thiazole); 7.36 1H, J=8.4, H-3 -cluinoline); 7.65 (dd, 1H, J=2.0, 9.0, H-7'-quinoline); 7.85 1H, J=9.0,

H-

8'-quinoline); 8.14 (mn, 2H-, H-5'-quinoiine); 9.22 (bs, 1H, NHC0NH-quinoline); 10.40 (bs, 1H, NH--thiazole).

ESI(+)MS: in/z 185 (100, (MH-(CH I) 2 CH-amino.thiazole)*) ;327 (7 5, N- (S-isopropyl-1, 3-thiazol-2-y1)-N*. [4- (cyanomethyl )phenyl Iurea IH- NMR (500 MHz-DD4SO-d,) 6ppm: 1.24 (di, 6H, J=6.9, CH 3 CHCH,) 3 .05 (mn, 1H, CH CHCH,); 7.03 IH, 1-thiazole); 3.94 2H, CH 2 7.27 2H, H-3, 1-5-phenyl); 7.48 (d, 2H, J=8.5, H-6-phenyl); 9.01 (bs, 1H, NH-phenyl); 10.30 (bs, 1H N H-thiazole).

ESI(+)MS. m/z 301 (100, N- (S-isopropyl-1,3-thiazol-2-y1)-N'-( 2 -quinolinyl)urea 3.H- NMR (500 MvHzDMSO-d,) 8 ppm: 1.27 (di, 6H1, J=:6.8, CH 3 CHCH.) 3. 13 (mn, 1H, CH 3CHCH 3 7.17 IH, H-thiazoie); 7.44 (mn, 1H, H-3-quinoline); 7.50 (mn, 1H, H-6 -quinoline) 7.75 (in, 111, H-7-quinoline); 7.82 (mn, 1H1, H-8-quinoline) 7.90 (mn, 1H,. H-5 quinoline) 8.34 (in, 1H, H-I-4 -quinoline) 10.45 (bs, 1H, NHCONH-quinoline); 13.02 (bs, 1H, NHCON).

ESI(+)MS: m/z 313 (100, N- (5-isopropy..i, 3 -thiazo-2y)N (1oxo23-dhydolH urea; N- (S-isopropyl-1, 3-thiazoi-2-y1) (3-oxo-1, 3-dihydro-2benzofuran-5-y1)urea NNR (500 IHz-DMSO-d,) 6ppm: 1.24 6H1, J=6.8, CH CHCH,) 3.06 (mn, iH, CH 3CHCH,) 7.04 1H, H-thiazole) 5.35 1H, CH,) 7.58 111, J=8.4, H-5*-phenyl) 7.71 iH, J=8.4, H-6*-phenyl); 8.08 1H, 1-2'-phenyl); 9.34 (bs, 1H, NHlCONHPh); 10.50 (bs, 11-, NHCON).

ESI(+)MS: in/z 318 (100, 67 N- (5-isopropy.-1, 3-thiazol-2-y1) (5-oxo-5, 6,7, 8tetrahydro-2 -naphtalenyl )urea; methyl-3- (QI (5-isopropyl-1, 3-thiazol-2yl) amino) carbonyl} amino) 4 -methylbenzoate NNR (300 MHz-DMSO-d,) 6ppm: 1.25 6H, j=6.8, CH 3 CHCHI); 3.10 1H, CH 3 CHCH 3 2.30 3H, CH,-phenyl); 3.80 3H1, C11 3 7.05 1H, 1-thiazole); 7.30 1H, H-5-pheny1); 7.58 (dd, 1H, H-6-phenyl); 8.55 2H1, H-2phenyl NHPh); 10.80 (bs, IH, NH-thiazole).

ESI(+)NS: m/z 334 (100, yl) amino] carbonyl) amino) -3 -rethylbenzoate HNNR (300 MIHz-DMSO-d,) 6ppm: 1.21 6H, CHCHCH,); 3.03 (in, 1H, CHCHC3) 2.25 3H, CH,-phenyl) 3.83 311,

CH

3 O0); 7.03 1H, H-thiazole) 7.30 1H, H-3 -phenyl); 7.53 (dd, 1H1, H--4 -phenyl); 8.5 0 (mn, 2H, H- 6-phenyl NHjPh); 10.70 (bs, 1H, NII-thiazole).

ESI(+)MS: m/z 334 (100, N- (5-isopropyll1 3-thiazol-2.y1) 4 -iinidazo [1,2alpyridin-2-ylpheny1) urea H- NNR (300 NHz-DMSO-d,) 6ppm: 1.21 6H, J -6.8, CHCHC-I); 3.03 (mn, 1H, CH 3

CHCH

3 7.03 Cs, 1H, 11-thiazole); 6.84, 7.20 (2m, 2H1, 11-5', H-6 "imidazopyridine); 7.50, 7.90 (2mn, 5H, H1-2, H-3' H1-5, H-6 -phenyl H-7 imidazopyridine); 8.30 111, H- 3 -imidazopyridine) 8.50 1H, H- 4'-imida zopyri dine); 9.00 (bs, 1H, NHCONHPh); 10.30 (bs, 1H1, NHCON).

ESL(+)MS: m/z 236 (100, (MHi-(CH 3 2 -CHamino-thiazole)') ;in/z 3 78 (8 5, ethyl-4- (S-isopropyl-1, 3-thiazol-2yl) amino] carbonyl Iamino) benzoate NMR (300 M41z-DMSO-d,) 8 ppm: 1.20 6H, CH3CHCH,); 3.03 (mn, 1H1, CH 3 C1CH3); 7.00 1H, 11-thiazole) 1.15 3H, 68 CH,) 3. 58 2H, CH 2 -phenyl) 4 .06 2H, CH 2 7.16, 7.38 (2d, 4H, phenyl-); 8.90o (bs, 1H, NHCONHPh)~ 10. 30 (bs, 1H, NHCON).

ESI(+)MS: m/z 348 (100, (2R) -1-benzyl-2- (5-isopropyl-1, 3-thiazol-2yl )amino] carbonyl Iamino) propanamide; (f (5-isopropyl,3thiazol-2 yl )amino] carbonyl~benzoic acid (5-isopropyl-1, 3-thiazol-2yl)ainino] carbonyl)amino)benzoic acid; NMR (400 NMz-DMSO-d,) Ppm: 1.24 6H, J=G.8, CH8CHCH) 3.04 (mn, 1H, CH3CHCH,); 7.02 1H, H-thiazole); 7.35 1H, J=8.8, H-5 ,-phenyl); 7.55 (dd, 1H, 8-6'pheriyl); 7.88 (bs, 1H, H-2 -phenyl); 9.75 (bs, 1H, NHCONHPh); 11.00 (bs, 1H, NH-CON).

ESI(+)MS: in/z 340 (100, 3 -([(5-isopropy1,3.thiazol.2.

yl) amino] carbonyl}amino)benzoic acid IH- NMR (500 NI~z-DMSO-d.) 8 ppm: 1.24 6H, j=6.8, CH CHCH); 3.03 (mn, 1H, CHCHCH,1); 7.04 1H, H-thiazole); 7.40 (dd, 18, J=7.9, H-5'-phenyl); 7.58, 7.63 (2d, 2H, J=7.9, H-4, H-6 -phenyl) 8.13 1H, H-2 -phenyl); 9.28 1H, NHCONHPh); 10.50 (bs, 1H, NI-CON).

ESI(+)MS: m/z 306 (100, N- (5-isopropyl-1, 3-thiazol-2.y1) (5-methyl-3isoxazolyl) urea; N- (5-isopropyl-1, 3thiazo1.2-yl) (2,6dime thoxyphenyl) urea; N- (5-isopropyl-1 3-thiazol-2 1) (2, 3 dime thoxybenzyl) urea 1H- NNR (300 MHz-DMSO-d) ppm: 1.21 6H, J=6.8, CH CHCH.); 3. 03 (mn, 1H, CH CHCH 3; 4. 32 28H, J 1, CH) 3.72, 3.75 (2s, 68, 2 OCH 3 6.8-7.0 (mn, 3H, phenyl); 6.97 69 1H, H- thiazole) 6 .9 0 (bs, 1H, NHCH,) 10.-2 0 (bs, lH, NH-thiazole).

ESI(+)-MS: m/z 336 (100, N- (5-isopropyl1,13.thiazol2yl)N 3 4 difluorobenzyl) urea; N- (5-isopropyl-l, 3-thiazol-2-y1) 4dime thhiphenyl) urea; N- (5-isopropyll1, 3 -thiazo1-2-yl) N*-butylurea NMR (300 NHz-DMSO-d.) ppm: 1.20 6H, CHCHCH,) 3.0 0 (in, 1H, CH 3CHCH,); 0.85 3H, CH 3 1.20-1.40 (mn, 4H, CH2- CH2); 3.10 (in, 2H, CH2-NH); 6.94 1H, J=1.0, H-thiazole); 6.49 1H, NHCH,); 10.5 (bs, 1H, NH-thiazole).

ESI(+)-MS: in/z 242 (100, N- (5-isopropy-1, 3thiazol2.yl)-N benzoylura N- (-methyl1,3thiazol2yl)-N-( 2 6 -dimnethylphenyl) urea; N- (5-methyl,3thiazo-2-l) -N byur N- (5-methyl1., 3thiazol2yl) -N butylurea; N- (5-methyl-i, 3-thiazol-2-yl) 4 -morpholinecarboxamide; N- (5-methy1 3thiazo2yl)N phnlur N- (5-methyl-i, 3-thiazol-2-y1)N 4 -methoxybenzyiurea; N- (-meth1 l-t thzo a2o1. -Ny1(4Nfuorohnlur N- (l -ethyl -2 -pyrrolidinyl) methyl]I (5-methyl-i, 3-thiazol- 2 -yl)urea; N- (5-methyl-l, 3 -thiazol2y) (-h5hoydroxpyrazl- 3 yl) urea; N- (5 -methyl 3 -thiazol-2 pyridiny1) urea; N- 4 -fluorophenyl)N-(55-ethyl-y1, 3 thil 2 -l ra All compounds were characterized by mass spectrometry

(MS).

LC-MS confirmed that in each case the principle component had a molecular ion corresponding to the expected product.

The compounds showed an HPLC area ranging from 70 to 100.

HPLC analysis: Instrument: Beckman System Gold Cromatographer (127 Solvent module, 168 Detector, 507e Autosampler) Mobile A: H 2 0/CHCN (90/10) 0.1 TFA.

Mobile B: H,0/CH 3 CN (10/90) 0.075

TFA.

Flow rate: 1.5 ml/min.

Sample volume: 20 cml.

Column: Supelco n Discovery RP Amide C16, 5pm, (50x4.6)mm Temp: 25 0

C.

Gradient: Time (min) A

B

0 0 100 0 100 7 100 0 100 0 Detection: diode array UV 254 nm.

All the compounds were analyzed by MS spectrometry

(ESI)

using a LCQ Finnigan Mass Spectrometer.

37 randomly chosen compounds were analyzed by H'-NMR.

The spectra were run on a Varian XL 400 Spectrometer.

Claims

1. The use of a compound which is a 2-ureido-l,3-thiazole derivatives of formula (I) H I R2 wherein R is a halogen atom, a nitro group, an optionally substituted amino group or it is a group, optionally further substituted, selected from: i) straight or branched C 1 -C 6 alkyl; ii) cycloalkyl; iii) aryl or arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R is an optionally further substituted group selected from: i) straight or branched C,-C 6 alkyl; ii) 3 to 6 membered carbocycle or 5 to 7 membered heterocycle ring; iii) aryl or arylcarbonyl; iv) arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R is hydrogen, a straight or branched alkyl or C,-C, alkenyl or alkynyl group; or, taken together with the nitrogen atom to which they are bonded, R, and R, form a substituted or unsubstituted group selected from: i) an optionally benzocondensed or bridged 5 to 7 membered heterocycle; or ii) a 9 to 11 membered spiro-heterocyclic compound; or a pharmaceutically acceptable salt thereof; in the manufacture of a medicament for treating cell proliferative disorders associated with an altered cell dependent kinase activity. -72-

2. Use according to claim 1 wherein the said cell proliferative disorder is selected from the group consisting of cancer, Alzheimer's disease, viral infections, auto-immune diseases or neurodegenerative disorders.

3. Use according to claim 2 wherein the cancer is selected from the group consisting of carcinoma, squamous cell carcinoma, hematopoietic tumors of myeloid or lymphoid lineage, tumors of mesenchymal origin, tumors of the central and peripheral nervous system, melanoma, seminoma, teratocarcinoma, osteosarcoma, xenoderoma pigmentosum, keratoctanthoma, thyroid follicular cancer and Kaposi's sarcoma.

4. Use according to proliferative disorder consisting of benign adenomatosis polyposis, vascular smooth cell atherosclerosis, pul glomerulonephritis and restenosis. claim 1 wherein the cell is selected from the group prostate hyperplasia, familial neuro-fibromatosis, psoriasis, proliferation associated with onary fibrosis, arthritis post-surgical stenosis and

5. Use according to any one of the preceding claims wherein the medicament enables tumor angiogenesis and metastasis inhibition.

6. A compound which is a 2-ureido-l,3-thiazole derivative of formula (I) R N NRH I 1 H I R2 wherein -73- R is a halogen atom, a nitro group, an optionally substituted amino group or it is a group, optionally further substituted, selected from: i) straight or branched C 1 alkyl; ii) C3-C 6 cycloalkyl; iii) aryl or arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R, is an optionally further substituted group selected from: i) straight or branched C,-C 6 alkyl; ii) 3 to 6 membered carbocycle or 5 to 7 membered heterocycle ring; iii) aryl or arylcarbonyl; iv) arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R is hydrogen, a straight or branched CI-C alkyl or C 2 -C. alkenyl or alkynyl group; or, taken together with the nitrogen atom to which they are bonded, R, and R, form a substituted or unsubstituted group selected from: i) an optionally benzocondensed or bridged 5 to 7 membered heterocycle; or ii) a 9 to 11 membered spiro-heterocyclic compound; or a pharmaceutically acceptable salt thereof; for use as a medicament; provided that: a) when R is a chlorine atom and R, is hydrogen, then R, is not methyl, phenyl or trifluoromethylphenyl; and b) when R is methyl and R, is hydrogen, then R, is not oxazolyl)phenyl.

7. A compound which is a 2-amino-1,3-thiazole derivative of formula (I) H I R2 wherein -74- R is a halogen atom, a nitro group, an optionally substituted amino group or it is a group, optionally further substituted, selected from: i) straight or branched C,-C 6 alkyl; ii) C 3 -C 6 cycloalkyl; iii) aryl or arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; RI is an optionally further substituted group selected from: i) straight or branched C,-C 6 alkyl; ii) 3 to 6 membered carbocycle or 5 to 7 membered heterocycle ring; iii) aryl or arylcarbonyl; iv) arylalkyl with from 1 to 6 carbon atoms within the straight or branched alkyl chain; R 2 is hydrogen, a straight or branched C,-C 4 alkyl or C -C 4 alkenyl or alkynyl group; or, taken together with the nitrogen atom to which they are bonded, R, and R 2 form a substituted or unsubstituted group selected from: i) an optionally benzocondensed or bridged 5 to 7 membered heterocycle; or ii) a 9 to 11 membered spiro-heterocyclic compound; or a pharmaceutically acceptable salt thereof; provided that: a) when R is chlorine or bromine and R 2 is hydrogen, then R, is not unsubstituted CI-C, alkyl, phenyl, trifluoromethylphenyl or an optionally substituted phenylcarbonyl; b) when R is methyl and R 2 is hydrogen, then R, is not methyl, phenyl or 4 c) when R is nitrophenyl and R 2 is hydrogen, then R 2 is not haloalkyl; d) when R is bromine or chlorine, then R, and R 2 are not both methyl groups.

8. A compound of formula according to claim 7 wherein R is a halogen atom, a straight or branched C-C 4 alkyl group, a phenyl or a cycloalkyl group; R 2 is hydrogen and R is an optionally substituted group selected from alkyl, aryl or arylalkyl.

9. A compound of formula according to claim 8 wherein R is bromine or chlorine, a straight or branched CI-C 4 alkyl group, a phenyl or a cycloalkyl group; R 2 is hydrogen and R, is an optionally substituted aryl or an arylalkyl or heterocyclyl-alkyl group with from 1 to 4 carbon atoms within the alkyl chain. A compound of formula according to claim 7 wherein R is a halogen atom or is selected from the group consisting of nitro, amino, alkylamino, hydroxyalkylamino, arylamino, C 3 -C 6 cycloalkyl, straight or branched C,-C 6 alkyl optionally substituted by hydroxy, alkylthio, alkoxy, amino, alkylamino, alkoxycarbonylalkylamino, alkylcarbonyl, alkylsulfonyl, alkoxycarbonyl, carboxy, aryl optionally substituted by one or more hydroxy, halogen, nitro, alkoxy, aryloxy, alkylthio, arylthio, amino, alkylamino, dialkylamino, N-alkyl-piperazinyl, 4-morpholinyl, arylamino, cyano, alkyl, phenyl, aminosulfonyl, aminocarbonyl, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl or carboxy, or R is an aryl group optionally substituted by one or more hydroxy, halogen, nitro, alkoxy, aryloxy, alkylthio, arylthio, amino, alkylamino, dialkylamino, N-alkyl-piperazinyl, 4- morpholinyl, arylamino, cyano, alkyl, phenyl, aminosulphonyl, aminocarbonyl, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl or carboxy; R, is a straight or branched C,-C 6 alkyl group or an aryl group, each optionally substituted as above reported for R; R is a hydrogen atom; and pharmaceutically acceptable salts thereof; provided that: -76- a) when R is chlorine or bromine then R. is not unsubstituted alkyl, phenyl, trifluoromethylphenyl or an optionally substituted phenylcarbonyl; b) when R is methyl then R is not methyl, phenyl or oxazolyl)phenyl; c) when R is nitrophenyl then R, is not haloalkyl.

11. A compound of formula according to claim 7 wherein R is a straight or branched C 1 -C 6 alkyl group and, together with the nitrogen atom to which they are bonded, R, and R 2 form a substituted or unsubstituted, optionally benzocondensed or bridged 5 to 7 membered heterocycle, or a 9 to 11 membered spiro-heterocycle.

12. A compound of formula according to claim 7 wherein R is a straight or branched alkyl group; R, is a straight or branched C,-C alkyl or C 2 alkenyl or alkynyl group and R. is an aryl or arylalkyl group with from 1 to 4 carbon atoms within the straight or branched alkyl chain.

13. A compound of formula according to any one of the preceding claims, whenever appropriate in the form of pharmaceutically acceptable salts, selected from the group consisting of: 1) N-(5-isopropyl-l,3-thiazol-2-yl)-N'-phenyl-urea; 2) N-(5-bromo-l, 3-thiazol-2-yl)-N'-phenyl-urea; 3) N- (5-phenyl-1, 3-thiazol-2-yl) -N'-phenyl-urea; 4) N-(5-cyclopropyl-l,3-thiazol-2-yl)-N'-phenyl-urea; N-(5-bromo-l,3-thiazol-2-yl)-N'-(4-sulfamoyl-phenyl)- urea; 6) N-(5-isopropyl-l,3-thiazol-2-yl)-N'-(4-sulfamoyl-phenyl)- urea; 7) N-(5-phenyl-l,3-thiazol-2-yl)-N'- (4-sulfamoyl-phenyl) urea; 8) N-(5-cyclopropyl-1,3-thiazol-2-yl)-N'-(4-sulfamoyl- phenyl)-urea; 9) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3-methoxy-phenyl)- urea; 77 N-(5-bromo-1,3-thiazol-2-yl)-N(3-.methoxy-phenyl)- urea; 11) N- (5-phenyl-1,3--thiazol-2-yl)-N' -(3-Inethoxy-phenyl)- urea; 12) N-(5-cyclopropyl-1,3-thiazol2yl)-NK.(3methoxy- phenyl) -urea; 13) N-(5-isopropyl-1,3-thiazo-2y)N'(4-chloro-phenyl)- urea; 14) N- (5-bromo-1,3-thiazol-2-yl)-N'-(4chloro..phenyl)-urea; 15) N-(5-phenyl-1,3-thiazol-2-y)-N-(4-chloro-phenyl)- urea; 16) N-(5-cyclopropyl-1,3-thiazol-2-yl)-N'. (4-chioro- phenyl) -urea; 17) N-(5-isopropyl-,3-thiazo-2y)N'(3-chloro-phenyl)- urea; 18) N- (5-bromo-1, 3-thiazol-2-yl) -N'-(3-chioro-phenyl) -urea; 19) N-(5-pheny1-1,3-thiazol-2-yl)-N'(3-choro.phenyl)- urea; N-(5-cyclopropyl-1,3-thiazol-2-yl)-N'-(3-chioro- phenyl) -urea; 21) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2choropheny). urea; 22) N-(5-bromo-1,3-thiazol-2-yl) (2-chloro-phenyl)-urea; 23) N-(5-phenyl-1,3-thiazol-2-yl)-N'-(2-chlorophenyl). urea; 24) N-(5-cyclopropyl-1,3-thiazol-2-yl) (2-chioro- phenyl)-urea; N-(5-isopropyl-1,3-thiazol-2-y)-NK (4-methoxy-phenyl)- urea; 26) N- (5-bromo-1, 3-thiazol-2-yl) -N'-(4-methoxy-phenyl) urea; 27) N-(5-phenyl-1,3-thiazol-2-yl)4NL(4..methoxy-phenyl) urea; 28) N-(5-cyclopropyl-1,3-thiazol-2y)N'-(4-methoxy- phenyl)-urea; 29) N-(5-isopropyl-1,3-thiazol-2-yl) (4-hydroxy-phenyl)- urea; -78- N-5boo13tizl2y)N-4hdoypey) urea; 31) N- (5-phenyl-1,3-thiazo12y).N'..(4hydroxy-phenyl)- urea; 32) N- (5-cyclopropyl-1, 3-thiazol-2-yl) -N t -(4-hydroxy- phenyl) -urea; 33) N- (5-isopropy1-1,3-thiazo12-yl)N.(3-hydroxy-phenyl), urea; 34) N-(5-bromo-1,3-thiazo-2.yl)-N' -(3-hydroxy-phenyl)- urea; N- (5-phenyl-1, 3-thiazol-2-yl) (3-hydroxy-phenyl) urea; 36) N- (5-cyclopropy-1,3thiazo2y)Nu(3-hydroxy- phenyl) -urea; 37) N-(5-isopropy13thiazo y)N'(2methoxyphnl)- urea; 38) N- (5-bromo-1,3-thiazol2yl)-N'. 2 -methoxy-phe nyl)- urea; 39) N-5pey-,-hao--y)N-2mtoypey) urea; N- (5-cyclopropy-1,3thiazo2y)N'(2-methoxy- phenyl) -urea; 41) N- (5-isopropyl-1,3-thiazol.2-yl)N.(2-hydroxy-phenyl)- urea; 42) N-(5-bromo-1, 3 -thiazol-2-yl)-N'-(2-hydroxy-phenyl)- urea; 43) N-(5pey-,-hao -l)N-2hdoypey) urea; 44) N-(5-cyclopropyl-1,3thiazo..2-yl).N'-(2-hydroxy- phenyl)-urea; N-(5-isopropyl-1,3thiazo2yl)-N'-( 4 -nitro-phenyl)- urea; 46) N-(5-bromo-1,3-thiazol-2yl).N'-( 4 -nitro-phenyl)-urea; 47) N-(5-phenyl-1,3thiazo2yl)-N'(4-nitro--phenyl) urea; 48) N-(5-cyclopropy1-1,3thiazo12-yl)N.(4-nitro-phenyl)- urea; 49) N-5iorpl13tizl2y)N-4aiopey) urea; 79 N-(5-bromo-1,3thiazo2yl)-I (4-amino-phenyl) -urea; 51) N-Spey-,-hao- y)N-4aiopey)urea; 52) N-(5-cyclopropy1,13-thiazo1-2y)N(4aminophenl) urea; 53) N-(5-isopropyl-1,3-thiazo12-y)N'-.( 3 -nitro-pheiyl)- urea; 54) N-(5-bromo-l, 3 -thiazo2.yl)N..(3.nitro-phenyl) urea; N-(5pey-,-hazl2y)N-3nir-hnl-ra 56) N-(5-cyclopropy-1,3thiazo2yl)-NK.(3nitro-phenyl)- urea; 57) N-(5-isopropyl1,3-thiazol.2..y)N(3-amino-phenyl)- urea; 58) N- (5-broro1, 3 -thiazol -2 -amhino-phenyl) -ra 59) N-(5-phenyl-1,3thiaz2yl)-NL 3 -amino-phenyl)-urea; 60) N- (5-cyclopropy-1,3thiazo2y)-N-(3-amino-phenyl)- urea; 61) N- isopropy 3 thiaz o 2 yl) N'benzyl urea; 62) N- (5-bromo-1, 3-thiazol-2-yl) -N'-berizyl-urea; 63) N- (5-phenyl-1, 3-thiazo12-yl) N-benzyl-urea; 64) N- (5-cyclopropy-1, 3thiazo2yl) N'-benzyl-urea; N- (5-isopropyl-1, 3thiazo12-yl)-N'- (pyrid-3-yl) -urea; 66) N- (5-bromo-1, 3-thiazo-2y)N-(pyrid-3yl)-urea; 67) N- (5-pheny-1, 3thiazo2yl)-N- -(pyrid-3-yl) -urea; 68) N- (5-cyclopropy-1, 3thiazo12-yl)N'-..(pyrid 3 yl) urea; 69) N- (5-bromo-1,3-thiazol-2-yl)-NQ (pyrid-4-yl)-urea; N-5iorpl13tiao -l--prd4yl) urea; 71) N-5p ey -h a o l i -l -r a 72) N-(5-cyclopropyl-1,3-thiazo2yl).NK(pyrid 4 yl)- urea; 73) N-5iorpl13tizl2-l-'(yi--l-ra 74) N-(5-bromo-1,3-thiazo12-yl)N.(pyrid-2 yl) urea; N-(5-phenyl-1, 3 -thiazo2yl)-NK(pyrid->yl) urea; 76) N-(5-cyclopropy-1,3thiazo12y)N'(pyrid2yl)- urea; 77) N-(5-isopropy1-1,3-thiazo1>yl).NL-(benzothiophen- 2 yl) -urea; 80 78) N- (5-bromo-1,3-thiazol-2-yl) (benzothiophen-2-yl) urea; 79) N- (5 -phenyl 3 -thiazol 2-yl) (benzothiophen- 2-yl) urea; 79a) N- (5 -cyclopropyl 3- thiazol 2-yl) (benzothiophen- 2-yl) -urea; N-(5-isopropyl-1,3-thiazol-2-yl)-4-morpholine carboxamide; 81) N- (5 isopropyl 3- thiazol -2 (4 -methyiphenyl) urea; 82) N-(5-isopropyl-1,3-thiazol-2-y.)-N'-(3- fluorophenyl) urea; 83) N-(5-isopropyl-1,3-thiazol-2-y.)-N'-(4- cyanophenyl) urea; 84) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3- cyanophenyl) urea; N- (5 isopropyl 3 -thiazol 2-yl) (2,6 dimethyiphenyl) urea; 86) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- fluorobenzyl) urea; 87) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3- acetyiphenyl) urea; 88) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- acetyiphenyl) urea; 89) 3-({[(5-isopropyl-1,3-thiazol-2- yl) amino] carbonyl)amino) benzoic acid; N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- isopropyiphenyl) urea; 91) 3-({[(5-isopropyl-1,3-thiazol-2- yl) amino] carbonyl )amino) benzamide; 92) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- methoxybenzyl) urea; 93) N-(5-isopropyl-1,3-thiazol-2-y)-N'-(4- butyiphenyl) urea; 94) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- trifluoromethyiphenyl) urea; H:\Shonal\Keep\Speci\P53468- Divisional Speci 17/06/04 80a N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3- bromophenyl) urea; 96) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- cyclohexyiphenyl) urea; H: \Shonal\Keep\Speci\PS3468 Divisional Speci 17/06/04 81 phenoxyphenyl) urea; 98) N-.(5-isopropyl-1,3-thiazol-2-yl)-N-(4- benzyloxyphenyl )urea; 99) N-5iorpl13tizl2y)N-35 dime thy iphenyl) urea; 100) N-(5-isopropyl-1,3-thiazo-2yl)-NL(2,3- dime thy iphenyl )urea; 101) N-(5-isopropyl-1,3-thiazol-2-y)N(3.methoxy[1,1'- biphenyl] -4-yl)urea; 102) N-(5-isopropyl-1,3-thiazol-2-yl)-3,4dihydro.2(lH)- isoquinoline carboxanide; 103) N-benzyl-N- -(5-isopropyl-1,3-thiazol-2yl).N- methylurea; 104) N-(5-isopropyl-1,3-thiazol-2-yl)6,7dimethoxy3,4 dihydro-2 (1H) -isoquinoline carboxamide; 105) N-(5-isopropyl-1,3-thiazol-2-y1)-NK-[(3-chloro-4- methyl) -phenyl Jurea; 106) N-(5-isopropyl-1,3-thiazol-2-yl)-N.[ (3-chloro-6- methyl) phenyllIurea; 107) N-(5-isopropyl-1,3-thiazo-2yl)N'(2,5 dime thoxyphenyl )urea; 108) N-(5-isopropyl-1,3-thiazol-2-yl)-NL-(3,4- dime thoxyphenyl )urea; 109) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[(2-methoxy-5- chioro) phenyl ]urea; 110) N-(5-isopropyl-1,3-thiazol-2-yl)-N-( (2-chloro-4- methoxyphenyl )urea; 111) N-(5-isopropyl-1,3-thiazol-2-yl)-NL-(3,5- dichiorophenyl) urea; 112) 11-ihnl--y]N(-spoyl13tizl2 yl )urea; 113) N-ethyl-N t (5-isopropyl-l,3-thiazol-2-y)-Nphenylurea; 114) N- [(5-isopropyl-1, 3-thiazol-2- yl) amino] carbonyl~amino) -2-methoxyphenyl] acetamide; 115) 2 -({[(5-isopropyl-1,3-thiazol-2- yl) amino) carbonyl} amino) -N-phenylbenzamide; 82 116) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2- morpholinophenyl )urea; 117) N- [(5-isopropyl-1, 3-thiazol-2- yl) amino] carbonyl)amino)phenyl] -N-methyl acetamide; 118) N- 2 -{f[cyclohexyl (methyl) amino] methyl)phenyl) isopropyl-1, 3-thiazol-2-yl)urea; 119) N-[3-({[(5--isopropyl-1,3-thiazol-2- yl) amino] carbonyllamino) -4-methoxyphenyl] acetamide; 120) N-(5-isopropyl-1,3-thiazol-2-yl)-4-(4-methoxyphenyl)- 1-piperazine carboxamide; 121) N-(2-furylmethyl)-N' -(5-isopropyl-1,3-thiazol.2- yl) urea; 122) N-(4-fluorophenyl)-N'-(5-isopropyl-1,3-thiazol-2. yl) urea; 123) N-(2-methoxybenzyl)-N'-(5-isopropyl-1,3-thiazo..>. yl) urea; 124) N- (5-isopropyl-1,3-thiazol-2-yl)-N'-[2-(l-methyl.4H. pyrrol-2 -yl) ethyl] urea; 125) N-(34dmtoyezl '(5iorpl13tizl2 yl)urea; 126) N- (5-isopropyl-1,3-thiazol-2-yl)-4-oxo-1-phenyl-1,3,8- triazaspiro [4 decane-8-carboxamide; 127) N-(5-isopropy1-1,3-thiazol-2-y1)-1,4-dioxa-8- azaspiro decane-8-carboxamide; 128) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[2-(1- piperidinyl) ethyl] urea; 129) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[2-(1- morphol inyl) ethyl ]urea; 130) 4-(4-fluorophenyl)-N-(5-isopropy1-1,3-thiazo1-2-yl)-l piperazine carboxamide; 131) N-[C4 -chlorophenyl) 3-ethyl- isopropyl-1, 3-thiazol-2-yl)urea; 132) (4-f luorophenyl) 1, 3-thiazol-2-yl) -1-piperidine carboxarnide; 133) N-(3-ethynylphenyl)-N'-(5-isopropyl-1,3-thiazop2- yl) urea; 134) N-(2-methoxy-3-fluorophenyl)-N'-(5-isopropyl-1,3- thiazol-2-yl)urea; 83 135) N-(5-isopropy-1,3-thiazo-2-y)-I '-(4-oxo-1- piperidinyl) urea; 136) N-(3-acetylaminophenyl)-N'-(5-isopropyl-1,3-thiazol-2- yl )urea; 137) N-[3-(2-furyl)-1H-pyrazol-5-ylJ-N'-(5-isopropyl-1,3- thiazol-2-yl.) urea; 138) N- [ethyl (isopropyl) amino] phenyl) ii 3-thiazol-2-yl)urea; 139) N-(1,3-benzodioxol-5-yl)-Nl-(5-isopropyl-1,3-thiazol-2- yl)urea; 140) 5- [(5-isopropyl-1,3-thiazol-2- yl)amnojcarbonyl) amino) -1-phenyl-1H-pyrazole-4- carboxamide; 141) N- (5-isopropyl-1..3-thiazol-2-yl)-N'- (4- pyridinylmethyl) urea; 142) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2-pyrazinyl)urea; 143) N-(5-isopropyl-1,3-thiazo1-2-y1)-N'-(5-phenyl-1,3,4- oxadiazol-2-yl )urea; 144) N-(5-isopropy1-1,3-thiazo1-2-yl)-4-(2-oxo-2,3-dihydro- 1H-benzimidazol-1-yl) -1-piperidine carboxamide; 145) N- (1,3-benzothiazol-6-yl)-N'-(5-isopropyl-1,3-thiazol- 2-yl) urea; 146) N-i1,3-dimethyl-1H-pyrazol-5-yl)-N'-(5-isopropyl-1,3- thiazol-2-yl )urea; 147) N- (3-phenyl-1-methyl-1H-pyrazol-5-yl)-N'- 1, 3-thiazol-2-yl)urea; 148) N-(5-isopropyl-1,3-thiazol-2-yl)-3-hydroxy-1- piperidine carboxamide; 149) N-(5-isopropy1-1,3-thiazo1-2-y1)-N-(2-methy1-1,3- dioxo-2, 3-dihydro-1H-isoindol-5-yl)urea; 150) N- (5-isopropyl-1,3-thiazol-2-yl)-4-benzyl-1-piperazine carboxamide; 151) N-(5-isopropyl-1,3-thiazol-2-yl)-4-methyl-1-piperazine carboxamide; 152) 4-hydroxy-N-(5-isopropyl-1,3-thiazol-2-yl)-1- piperidine carboxamide; 153) N-(5-isopropyl-1,3-thiazol-2-yl)-3- azabicyclo [3.2.2 ]nonane-3-carboxamide;

84- 154) N-(5-isopropyl-1,3-thiazol-2-yl)-4-(4-acetylphenyl)1l piperazine carboxamide; 155) 4-[bis(4-fluorophenyl)-N-(5-ispopropy3thiazol>2 yl) -1-piperazine carboxaniide; 156) N-(5-isopropyl-1,3-thiazol-2-yl)-4-oxo-2,3,4,5- tetrahydro-1H-1, 5-benzodiazepine-1-carboxamide; 157) N-(5-isopropyl-1,3-thiazol-2-y)-N'-(567,8 tetrahydro-l1-naphtalenyl) urea; 158) N-(4-pheny1-2-thiazoly1)-N(-(5-isopropyl-.1,3-thiazo12. yl)urea; 159) 4-(4-fluorobenzoyl)-N-(5-isopropyl-1,3-thiazol-2yl). 1-piperidine carboxamide; 160) N-(5-isopropy1-1,3-thiazo1-2-yl)-N'-1,3-dihydro-2 )urea; 161) N- (5-isopropyl-1, 3-thiazol-2-yl) -4 (2-pyrimidinyl) 1- piperazirie carboxamide; 162) N-(5-isopropyl-1,3-thiazol-2-yl)-3-oxo-3,4-dihydro- 1 (2H) -quinoxaline; 163) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(1H-indazol.6- yl)urea; 164) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2- chlorobenzyl )urea; 165) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2,4- dichlorobenzyl) urea; 166) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3- fluorobenzyl) urea; 167) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3,4- dichlorobenzyl) urea; 168) N-5iorpl13thao--l--24 difluorobenzyl) urea; 169) N- (5-isopropyl-1,3-thiazol-2-yl)-N'-(2,5- difluorobenzyl) urea; 170) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2,6- difluorobenzyl) urea; 171) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[ (4-hydroxy-3- methoxy) benzyl] urea; 172) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(5-methyl-2- furyl )urea; 85 173) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(4- methylsulfonylbenzyl )urea; 174) (lR,2R)-2-hydroxy-2,3-dihydro-Hinden1y1>N.j5- isopropyl-1, 3-thiazol-2-yl)urea; 175) N-(5-isopropyl-1,3-thiazol-2-yl)-NK.(4- chlorobenzyl) urea; 176) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2- pyridiiylmethyl) urea; 177) N- (5-isopropyl-1, 3-thiazol-2-y)-N'- dimethoxybenzyl) urea; 178) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3- pyri dinylme thyl) urea; 179) N- (5-isopropyl-1, 3-thiazol-2-yl) (4- trifluorobenzyl )urea; 180) N-(5-isopropy1-1,3-thiazo1-2-y1)-Nu-(3, 4 5 trimethoxybenzyl )urea; 181) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2,4- dime thoxybenzyl) urea; 182) N-(5-isopropyl-1,3-thiazol-2-yl)-N-(4- dimethylaminobenzyl) urea; 183) N-(5-isopropyl-1,3-thiazol-2-y)-N'(2,5- dime thoxybenzyl) urea; 184) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[(2-chloro-6- phenoxy) benzyl ]urea; 185) N-(5-isopropyl-1,3-thiazol-2-y1)-N-[(1R,2S)-2-hydroxy- 2, 3-dihydro-1H-inden-1-yllurea; 186) N-(5-isopropyl-l 1 3-thiazol-2-yl)-N'-(3.hydroxy4- methyl)phenyl]urea; 187) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[4-(1H- benzirnidazoj-2-yl)phenyl]urea; 188) N-(5-isopropyl-1,3-thiazol-2-yl)-N-(3-phenyl-J1. urea; 189) N-(5-isopropy1--1,3-thiazol-2-y1)-N'-(2-methy..6- quinolinyl) urea; 190) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[4- (cyanomethyl.) phenyl] urea; 191) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2-quinolinyl)urea; 86 192) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(-ox0-2,3-dihydro- )urea; 193) N-.(5-isopropyl-1,3-thiazo1-2-y1)-N'-(3oxo13dihydro- )urea; 194) N-(5-isopropy1-1,3-thiazo-2-y)-N'-(5oxo56,78 tetrahydro-2 -raphtalenyl) urea; 195) methyl-3- (5-isopropyl-1, 3-thiazol-2- yl) amino] carborayl} amino) -4--methylbenzoate; 196) methyl-4- (5-isopropyl-1,3-thiazol-2- yl)aminolcarbonyl~amino) -3-methylbenzoate; 197) N-(5-isopropy1-1,3--thiazo1-2-yl)-N'-(4-imidazo[1,2 a] pyridin-2-yl-phenyl) urea; 198) ethyl-4- (5-isopropyl-1, 3-thiazol-2- yl) amino] carbonyl }amino) benzoate; 199) (2R)-1-benzyl-2-((f (5-isopropyl-1,3-thiazol-2-. yl) amino] carbonyl }amino) propanamide; 200) 2-hydroxy-5- [(5-isopropyl-1, 3-thiazol-2- yl)amino] carbonyl~benzoic acid; 201) 2-chloro-5-({ [(5-isopropyl-1,3-thiazol-2- yl)amino] carbonyllamino)benzoic acid; 202) 3- {[(5-isopropyl-1, 3-thiazol-2- yl)amino~carbonyl}amino)benzoic acid; 203) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(-methy>> isoxazolyl) urea;. 204) N-(5--isopropyl-1,3-thiazol-2-yl)-N'-(2,6- dirnethoxyphenyl) urea; 205) N-(5-isopropy1-1,3-thiazo1-2-yl)-N'-(2,3- dime thoxybenzyl) urea; 206) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3,4- difluorobenzyl) urea; 207) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(2,4- dirnethyiphenyl) urea; 208) N- (5-isopropyl-1, 3-thiazol-2-yl) yl )urea; 209) N-(5--isopropyl-1,3-thiazol-2-yl)-NI-[(R)- phenylglicinamido] urea; 87 210) N- (5-isopropyl-1, 3-thiazol-2-yl) phenoxyacetamido) urea; 211) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-[(S)- phenylgi ic inamido }urea; 212) N-(5-isopropyl-1,3-thiazol-2-yl)-N-{2-[(l-nethyl-lH- imidazol-2 -yl) methoxy] phenyl }urea; 213) N-(3--iodophenyl)-N'-(5-isopropyl-1,3-thiazol-2-yl)urea; 214) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-(3-(3-methoxy-1- propynyl )phenyl] urea; 215) N-{3-113-(dimethylamino)-l-propynyllphenyl}-N'-(5- isopropyl-1, 3-thiazol-2-yl)urea; 216) N-(4-({[(5-isopropyl--1,3-thiazol-2- yl) amino] carbonyllamino)phenyl] methanesulfonamide; 217) 2-[3-({[(5-isopropyl-l,3-thiazol-2- ylamino] carbonyl~amino)anilinolacetamide; 218) N-[3-(3-hydroxy-1-butynyl)phenyl-N'-(5-isopropyl-1,3- thiazol-2-yl) urea; 219) N-(imidazo[1,2-a]pyridin-2-yl-methyl)-N--(5-isopropyl- 1, 3-thiazol-2-yl)urea; 220) 2-{[([(5-isopropyl--1,3-thiazol--2-yl)amino]carbonyl}(2- propynyl )amino] methyl) benzenesul fonamide; 221) N-(lH-indol-6-yl)-N'-(5-isopropyl-1,3-thiazol-2- yl )urea; 222) (1S)-2-hydroxy-1-phenylethyl]-N'-(5-isopropyl-l,3- thiazol-2-yl)urea; 223) N-(1H--indol-5-yl)-N'-(5-isopropyl-l,3-thiazol-2- yl) urea; 224) (1R-2-hydroxy--1-phenylethylll-N'-(5-isopropyl-1,3- thiazol-2-yl )urea; 225) N-(5-isopropyl-1,3-thiazol-2-yl)-N'-butylurea; 226) N-(5-isopropyl-1,3-.thiazol-2-yl)-N"-benzoylurea; 227) N-(5-methyl-1,3-thiazo1-2-yl)-N'-(2,6- dime thyiphenyl )urea; 228) N- (5-methyl-i,3-hao -l-N-ezlra 229) N-(5-methyl-1, 3-thiazol-2-yl)-N'-butylurea; 230) N- (5-methyl-i, 3-thiazol-2-yl) -4-morpholinecarboxamide; 231) N-(5-methyl-1,3-thiazol-2-yl)-N 1 -phenylurea; 232) N-(5-methyl-1,.3-thiazol-2-yl) -4-methoxybenzylurea; -88- 233) N-(5-methyl-l,3-thiazol-2-yl)-N'-(4-fluorophenyl)urea; 234) N-[(l-ethyl-2-pyrrolidinyl)methyl]-N'-(5-methyl-1,3- thiazol-2-yl)urea; 235) N-(5-methyl-l,3-thiazol-2-yl)-N'-(5-hydroxy-!H-pyrazol- 3-yl)urea; 236) N-(5-methyl-1,3-thiazol-2-yl)-N'-(3-pyridinyl)urea; 237) N-(4-fluorophenyl)-N'-(5-methyl-1,3-thiazol-2-yl)urea. 14. A process for preparing a compound of formula as defined in claim 7, which process comprises: a) when R 2 is a hydrogen atom reacting a compound of formula (II) R S NH 2 wherein R is as defined in claim 7, with a compound of formula (III) R-NCO (III) wherein R, is as defined in claim 7; or b) when R 2 is as defined in claim 7 reacting a compound of formula (IV) (IV) R S NCO wherein R is as defined in claim 7, with a compound of formula (V) R-I\ (V) wherein R and R, are as defined in claim 7; and, if desired, converting a 2-ureido-1,3-thiazole derivative of formula into another such derivative of formula and/or into a salt thereof. A process for preparing a compound of formula as defined in claim 7, which process comprises reacting a compound of formula (II) -89- R S NH 2 wherein R is as defined in claim 7, with 4-nitrophenyl- chloroformate, or a polymer supported form of it, thus obtaining a compound of formula or a polymer supported form of it, 00 0- wherein R is as defined in claim 7; and reacting a compound of formula (VI) with a compound of formula (V) RF (V) R2 wherein R 1 and R 2 are as defined in claim 7; and, if desired, converting a 2-ureido-l,3-thiazole derivative of formula or a polymer supported form of it, into another such derivative of formula and/or into a salt thereof. 16. A pharmaceutical composition comprising one or more pharmaceutically acceptable carriers and/or diluents and, as the active principle, an effective amount of a compound of formula as defined in claim 1. Dated this 17th day of June 2004 PHARMACIA UPJOHN SPA By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia