81709-36-6Relevant academic research and scientific papers
2-Arylamino-6-ethynylpurines are cysteine-targeting irreversible inhibitors of Nek2 kinase
Bayliss, Richard,Boxall, Kathy,Carbain, Benoit,Coxon, Christopher R.,Fry, Andrew M.,Golding, Bernard T.,Griffin, Roger J.,Hardcastle, Ian R.,Harnor, Suzannah J.,Mas-Droux, Corine,Matheson, Christopher J.,Newell, David R.,Richards, Mark W.,Sivaprakasam, Mangaleswaran,Turner, David,Cano, Céline
supporting information, p. 707 - 731 (2020/08/24)
Renewed interest in covalent inhibitors of enzymes implicated in disease states has afforded several agents targeted at protein kinases of relevance to cancers. We now report the design, synthesis and biological evaluation of 6-ethynylpurines that act as covalent inhibitors of Nek2 by capturing a cysteine residue (Cys22) close to the catalytic domain of this protein kinase. Examination of the crystal structure of the non-covalent inhibitor 3-((6-cyclohexylmethoxy-7H-purin-2-yl)amino)benzamide in complex with Nek2 indicated that replacing the alkoxy with an ethynyl group places the terminus of the alkyne close to Cys22 and in a position compatible with the stereoelectronic requirements of a Michael addition. A series of 6-ethynylpurines was prepared and a structure activity relationship (SAR) established for inhibition of Nek2. 6-Ethynyl-N-phenyl-7H-purin-2-amine [IC50 0.15 μM (Nek2)] and 4-((6-ethynyl-7H-purin-2-yl)amino)benzenesulfonamide (IC50 0.14 μM) were selected for determination of the mode of inhibition of Nek2, which was shown to be time-dependent, not reversed by addition of ATP and negated by site directed mutagenesis of Cys22 to alanine. Replacement of the ethynyl group by ethyl or cyano abrogated activity. Variation of substituents on the N-phenyl moiety for 6-ethynylpurines gave further SAR data for Nek2 inhibition. The data showed little correlation of activity with the nature of the substituent, indicating that after sufficient initial competitive binding to Nek2 subsequent covalent modification of Cys22 occurs in all cases. A typical activity profile was that for 2-(3-((6-ethynyl-9H-purin-2-yl)amino)phenyl)acetamide [IC50 0.06 μM (Nek2); GI50 (SKBR3) 2.2 μM] which exhibited >5-10-fold selectivity for Nek2 over other kinases; it also showed > 50% growth inhibition at 10 μM concentration against selected breast and leukaemia cell lines. X-ray crystallographic analysis confirmed that binding of the compound to the Nek2 ATP-binding site resulted in covalent modification of Cys22. Further studies confirmed that 2-(3-((6-ethynyl-9H-purin-2-yl)amino)phenyl)acetamide has the attributes of a drug-like compound with good aqueous solubility, no inhibition of hERG at 25 μM and a good stability profile in human liver microsomes. It is concluded that 6-ethynylpurines are promising agents for cancer treatment by virtue of their selective inhibition of Nek2. This journal is
WEE1 inhibitors as well as preparation and application thereof
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Paragraph 0542; 0549-0552, (2020/10/14)
The invention relates to WEE1 inhibitors as well as preparation and application thereof. The present invention relates to compounds of formula (I), or pharmaceutically acceptable salts, solvates, polymorphs or isomers thereof, and their use in the preparation of medicaments for the treatment of diseases associated with WEE1 activity.
ANTITUMOR-EFFECT ENHANCER USING PYRAZOLO[3,4-D]PYRIMIDINE COMPOUND
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Paragraph 0317; 0391, (2020/01/22)
To provide a method for treating cancer using a pyrazolo[3,4-d]pyrimidine compound or a salt thereof. The present invention provides an antitumor agent comprising a pyrazolo[3,4-d]pyrimidine compound of formula (I) wherein X, Y, Z1, Z2/su
NOVEL PYRAZOLO[3,4-d]PYRIMIDINE COMPOUND OR SALT THEREOF
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Paragraph 0373; 0447, (2017/08/26)
To provide a novel compound having a HER2 inhibitory effect and having a cytostatic effect. It is also intended to provide a medicament useful in the prevention and/or treatment of a disease involving HER2, particularly, cancer, on the basis of the HER2 i
Selective Allosteric Antagonists for the G Protein-Coupled Receptor GPRC6A Based on the 2-Phenylindole Privileged Structure Scaffold
Johansson, Henrik,Boesgaard, Michael Worch,N?rskov-Lauritsen, Lenea,Larsen, Inna,Kuhne, Sebastiaan,Gloriam, David E.,Br?uner-Osborne, Hans,Sejer Pedersen, Daniel
, p. 8938 - 8951 (2015/12/09)
G protein-coupled receptors (GPCRs) represent a biological target class of fundamental importance in drug therapy. The GPRC6A receptor is a newly deorphanized class C GPCR that we recently reported for the first allosteric antagonists based on the 2-arylindole privileged structure scaffold (e.g., 1-3). Herein, we present the first structure-activity relationship study for the 2-arylindole antagonist 3, comprising the design, synthesis, and pharmacological evaluation of a focused library of 3-substituted 2-arylindoles. In a FRET-based inositol monophosphate (IP1) assay we identified compounds 7, 13e, and 34b as antagonists at the GPRC6A receptor in the low micromolar range and show that 7 and 34b display >9-fold selectivity for the GPRC6A receptor over related GPCRs, making 7 and 34b the most potent and selective antagonists for the GPRC6A receptor reported to date.
Tetrahydroindazole derivatives as ligands for GABA-A α 5 receptors
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, (2008/06/13)
4-oxo-tetrahydroindozole-3-carboxamide compounds according to Formula (I), or a pharmaceutically acceptable salt thereof, are GABA-A Alpha 5 ligands useful for enhancing cognition:
Indole-5-acetamides for treatment of migraine
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, (2008/06/13)
Compounds are disclosed of general formula (I): STR1 wherein R1, R3, R4, R6 and R7, which may be the same or different, each represents a hydrogen atom or an alkyl group; R2 represents a hydrogen atom or an alkyl, aryl, aralkyl, cycloalkyl or alkenyl group; or R1 and R2, together with the nitrogen atom to which they are attached, form a saturated monocyclic 5 to 7-membered ring which may optionally contain a further hetero function; R5 represents a hydrogen atom or an alkyl or alkenyl group; or R4 and R5 together form an aralkylidene group; Alk represents an alkylene chain containing two or three carbon atoms which may be unsubstituted or substituted by not more than two C1-3 alkyl groups; and X represents an oxygen or sulphur atom; and physiologically acceptable salts, solvates and bioprecursors thereof. The compounds are described as potentially useful for the treatment of migraine and may be formulated as pharmaceutical compositions in conventional manner using one or more pharmaceutically acceptable carriers or excipients. Various processes for the preparation of the compounds are disclosed including, for example, a process involving reacting an indole having an appropriate nitrile group at the 5-position, with a suitable oxygen- or sulphur-containing compound in order to introduce the required amide or thioamide group at the 5-position on the indole nucleus.
Anticonvulsant activity of some 4-aminophenylacetamides
Clark,Davenport
, p. 18 - 20 (2007/10/02)
A series of 4-aminophenylacetamides was prepared and evaluated for anticonsulvant activity. These compounds were prepared during studies designed to determine the relationship between benzamide-like compounds and anticonsulvant effects. Unlike benzamides, these phenylacetamides have a methylene group between the aromatic ring and the amide carbonyl. Consequently, formal conjugation is lost, and the number of conformational degrees of freedom has increased. The compounds were tested in mice against seizures induced by electroshock and pentylenetetrazol, and in the rotorod assay for neurologic deficit. The more active and selective anticonsulvants prepared in this study were those having an additional aromatic ring as part of the substituent on the amide nitrogen. Compound 16, the 4-aminophenylacetamide derived from 2,6-dimethylaniline, was the most potent compound observed (ED50 = 50.50 mg/kg against electroshock-induced convulsions and ED50 = 93.20 mg/kg against pentylenetetrazol-induced convulsions).
