55904-61-5

Usage

Uses

Used in Pharmaceutical Industry:
4-AMINO-2 H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER is used as a synthetic intermediate for the development of pharmaceuticals, leveraging its structural features to contribute to the creation of bioactive molecules with potential therapeutic effects.
Used in Agrochemical Industry:
In the agrochemical sector, 4-AMINO-2 H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER serves as a key intermediate in the synthesis of compounds designed to protect crops and enhance agricultural productivity, capitalizing on its reactivity and structural attributes to form agrochemicals with specific pesticidal or herbicidal properties.
Used in Organic Chemistry Research:
4-AMINO-2 H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER is utilized as a versatile building block in organic chemistry, facilitating the exploration of new reaction pathways and the synthesis of innovative organic compounds for various applications, including materials science and specialty chemicals.

InChI:InChI=1/C6H9N3O2/c1-2-11-6(10)5-4(7)3-8-9-5/h3H,2,7H2,1H3,(H,8,9)

Upstream product

• 55864-87-4 4-nitro-1H-pyrazole-3-carboxylic acid ethyl ester 

Downstream Products

• 55925-84-3 5-(5-benzoyloxymethyl-furan-2-yl)-1⁽²⁾,6-dihydro-pyrazolo[4,3-d]pyrimidin-7-one 
• 55904-50-2 5-(O⁵-benzoyl-β-D-ribofuranosyl)-1(2),6-dihydro-pyrazolo[4,3-d]pyrimidin-7-one 
• 55904-49-9 5-(O⁵-benzoyl-α-D-ribofuranosyl)-1(2),6-dihydro-pyrazolo[4,3-d]pyrimidin-7-one 
• 13877-55-9 pyrazolo<4,3-d>pyrimidin-7-one 
• 825618-95-9 4-(2,6-difluorobenzoylamino)-1H-pyrazole-3-carboxylic acid 
• 55904-62-6 5-methyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one 
• 825619-04-3 4-(2,6-dichlorobenzamido)-1H-pyrazole-3-carboxylic acid 

Relevant academic research and scientific papers

2H-PYRAZOLO [4,3-D]PYRIMIDIN-5-AMINE DERIVATIVES AS H4 HISTAMINE RECEPTOR ANTAGONISTS FOR THE TREATMENT OF ALLERGIC, IMMUNOLOGICAL AND INFLAMMATORY DISEASES

Pyrazolopyrimidine derivatives of formula (I), wherein the meaning of the different substituents are those indicated in the description. These compounds are useful as histamine H4 receptor antagonists.

PHARMACEUTICAL COMPOUNDS

The invention provides a cyclin dependent kinase (e.g. cdk-4 kinase) inhibitor of the formula (I) or a salt, tautomer, solvate or N-oxide thereof; wherein R1 is an optionally substituted monocyclic or bicyclic aryl or heteroaryl group containing 0-2 heteroatoms selected from O, N and S wherein the optional substituents are selected from halogen, C1-4 alkyl, C1-4 alkoxy, C3-4 cycloalkyl and cyano, and wherein the C1-4 alkyl and C1-4 alkoxy groups are each optionally further substituted by C1-2 alkoxy or one or more halogen atoms; and E is a group E1, E2, E3 or E4: formulae E1, E2, E3, E4 wherein n, q, A5 B, T, U, V, W, Z, R2, R5, R6 and R7 are as defined in the claims.

Identification of N-(4-piperidinyl)-4-(2,6-dichlorobenzoylamino)-1H- pyrazole-3-carboxamide (AT7519), a novel cyclin dependent kinase inhibitor using fragment-based X-ray crystallography and structure based drug design

The application of fragment-based screening techniques to cyclin dependent kinase 2 (CDK2) identified multiple (>30) efficient, synthetically tractable small molecule hits for further optimization. Structure-based design approaches led to the identification of multiple lead series, which retained the key interactions of the initial binding fragments and additionally explored other areas of the ATP binding site. The majority of this paper details the structure-guided optimization of indazole (6) using information gained from multiple ligand-CDK2 cocrystal structures. Identification of key binding features for this class of compounds resulted in a series of molecules with low nM affinity for CDK2. Optimisation of cellular activity and characterization of pharmacokinetic properties led to the identification of 33 (AT7519), which is currently being evaluated in clinical trials for the treatment of human cancers.

PYRAZOLE DERIVATIVES AS THAT MODULATE THE ACTIVITY OF CDK, GSK AND AURORA KINASES

The invention provides a compound of the formula (I): for use in medicine: or salts or tautomers or N-oxides or solvates thereof; wherein R1 is an optionally substituted heterocyclic group having from 3 to 12 ring members provided that the cyclic group joined to the pyrazole contains at least one heteroatom selected from N, O or S; A is a bond or -Y-(B)n-; B is C=O, NRg(C=O) or O(C=O) wherein Rg is hydrogen or C1-4 hydrocarbyl optionally substituted by hydroxy or C1-4 alkoxy; n is 0 or 1; Y is a bond or an alkylene chain of 1,2 or 3 carbon atoms in length; R2 is hydrogen; halogen; C1-4 alkoxy (e.g. methoxy); or a C1-4 hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4 alkoxy (e.g. methoxy); R3 is selected from optionally substituted carbocyclic and heterocyclic groups having from 3 to 12 ring members or an optionally substituted C1-8 hydrocarbyl group; with the proviso that R1 is not formula (II): where X, R3’ and R4’ are defined in the claims.

PYRAZOLE DERIVATIVES FOR THE INHIBITION OF CDK' S AND GSK' S

The invention provides compounds of the formula (I), or salts, tautomers, N-oxides or solvates thereof wherein: R1 is selected from: (a) 2,6-dichlorophenyl; (b) 2,6-difluorophenyl; (c) a 2,3,6-trisubstituted phenyl group wherein the substituents for the phenyl group are selected from fluorine, chlorine, methyl and methoxy; (d) a group R0; (e) a group R a; (f) a group Rlb; (g) a group Rlc; (h) a group Rld; and 0) 2,6-difluorophenylamino ; wherein R )0υ, r R> llaa, T Rj I1bD, T R) I1cC, r R> Iidα, r R?2zaa, r R>22bD and RJ are as defined in the claims. The compounds have activity as inhibitors of cdk kinase (such as cdkl or cdk2) and glycogen synthase kinase-3 activity.

3,4-DISUBSTITUTED PYRAZOLES AS CYCLIN DEPENDENT KINASES (CDK) OR AURORA KINASE OR GLYCOGEN SYNTHASE 3 (GSK-3) INHIBITORS

The invention provides compounds of the formula (I); or salts or solvates or N-oxides thereof; wherein: Rq is selected from groups (a), (b) and (c); the asterisk denoting the point of attachment to the pyrazole ring; X is N or CR5; X" is NR4', O, S or S(O); A is a bond or -(CH2)m-(B)n-; B is C=O, NRg(C=O) or O(C=O) wherein Rg is hydrogen or C1-4 hydrocarbyl optionally substituted by hydroxy or C1-4 alkoxy; m is 0, 1 or 2; n is 0 or 1; R0 is hydrogen or, together with NRg when present, forms a group -(CH2)p- wherein p is 2 to 4; and R1 to R6b are as defined in the description. Compounds of the formula (I) have activity as inhibitors of CDK, aurora and GSK-3 kinases are useful in treating or preventing diseases such as cancers that are mediated by the said kinases.

PHARMACEUTICAL COMPOUNDS

The invention provides a combination of a cytotoxic compound or signalling inhibitor and a compound having the formula (0): or salts or tautomers or N-oxides or solvates thereof; wherein X is a group R1-A-NR4- or a 5- or 6-membered carbocyclic or heterocyclic ring; A is a bond, SO2, C=O, NRg(C=O) or 0(C=O) wherein Rg is hydrogen or C1-4 hydrocarbyl optionally substituted by hydroxy or C1-4alkoxy; Y is a bond or an alkylene chain of 1, 2 or 3 carbon atoms in length; R1 is hydrogen; a carbocyclic or heterocyclic group having from 3 to 12 ring members; or a C1-8hydrocarbyl group optionally substituted by one or more substituents selected from halogen (e.g. fluorine), hydroxy, C1-4 hydrocarbyloxy, amino, mono- or di-C1-4 hydrocarbylamino, and carbocyclic or heterocyclic groups having from 3 to 12 ring members, and wherein 1 or 2 of the carbon atoms of the hydrocarbyl group may optionally be replaced by an atom or group selected from O, S, NH, SO, SO2; R2 is hydrogen; halogen; C1-4 alkoxy (e.g. methoxy); or a C1-4 hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4alkoxy (e.g. methoxy); R3 is selected from hydrogen and carbocyclic and heterocyclic groups having from 3 to 12 ring members; and R4 is hydrogen or a C1-4 hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4 alkoxy (e.g. methoxy).

COMBINATIONS OF PYRAZOLE KINASE INHIBITORS AND FURTHER ANTITUMOR AGENTS

The invention provides a combination of a compound having the formula (0) and two or more further anti-cancer agents: or salts or tautomers or N-oxides or solvates thereof; wherein X is a group R1-A-NR4- or a 5- or 6-membered carbocyclic or heterocyclic ring; A is a bond, SO2, C=O, NR9(C=O) or 0(C=O) wherein R9 is hydrogen or C1-4 hydrocarbyl optionally substituted by hydroxy or C1-4 alkoxy; Y is a bond or an alkylene chain of 1 , 2 or 3 carbon atoms in length; R1 is hydrogen; a carbocyclic or heterocyclic group having from 3 to 12 ring members; or a C1-8 hydrocarbyl group optionally substituted by one or more substituents selected from halogen (e.g. fluorine), hydroxy, C1-4 hydrocarbyloxy, amino, mono- or di-C1-4 hydrocarbylamino, and carbocyclic or heterocyclic groups having from 3 to 12 ring members, and wherein 1 or 2 of the carbon atoms of the hydrocarbyl group may optionally be replaced by an atom or group selected from O, S, NH, SO, SO2; R2 is hydrogen; halogen; C1-4 alkoxy (e.g. methoxy); or a C1-4 hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4 alkoxy (e.g. methoxy); R3 is selected from hydrogen and carbocyclic and heterocyclic groups having from 3 to 12 ring members; and R4 is hydrogen or a C1-4 hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4 alkoxy (e.g. methoxy).

PHARMACEUTICAL COMPOUNDS

The invention provides a combination of an ancillary agent and a compound having the formula (0): or salts or tautomers or N-oxides or solvates thereof; wherein the ancillary agent is selected from: a monoclonal antibody, an alkylating agent, an anticancer agent, a further CDK inhibitor and a hormone, hormone agonist, hormone antagonist or hormone modulating agent; X is a group R1-A-NR4- or a 5- or 6-membered carbocyclic or heterocyclic ring; A is a bond, SO2, C=O, NR9(C=O) or 0(C=O) wherein R9 is hydrogen or C1-4hydrocarbyl optionally substituted by hydroxy or C1-4 alkoxy; Y is a bond or an alkylene chain of 1 , 2 or 3 carbon atoms in length; R1 is hydrogen; a carbocyclic or heterocyclic group having from 3 to 12 ring members; or a C1-8 hydrocarbyl group optionally substituted by one or more substituents selected from halogen (e.g. fluorine), hydroxy, C1-4 hydrocarbyloxy, amino, mono- or di-C1-4 hydrocarbylamino, and carbocyclic or heterocyclic groups having from 3 to 12 ring members, and wherein 1 or 2 of the carbon atoms of the hydrocarbyl group may optionally be replaced by an atom or group selected from O, S, NH, SO, SO2; R2 is hydrogen; halogen; C1-4alkoxy (e.g. methoxy); or a C1-4 hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4 alkoxy (e.g. methoxy); R3 is selected from hydrogen and carbocyclic and heterocyclic groups having from 3 to 12 ring members; and R4 is hydrogen or a C1-4hydrocarbyl group optionally substituted by halogen (e.g. fluorine), hydroxyl or C1-4 alkoxy (e.g. methoxy).

3, 4-DISUBSTITUTED 1H-PYRAZOLE COMPOUNDS AND THEIR USE AS CYCLIN DEPENDENT KINASES (CDK) AND GLYCOGEN SYNTHASE KINASE-3 (GSK-3) MODULATORS

The invention provides compounds of the formula (0) or salts or tautomers or N-oxides or solvates thereof for use in the prophylaxis or treatment of disease states and conditions such as cancers mediated by cyclin-dependent kinase and glycogen synthase ki