ChemicalBook > CAS DataBase List > 2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride

2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride

Product Name
2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride
CAS No.
294646-77-8
Chemical Name
2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride
Synonyms
R8;(S)-CR8;(R)-CR8;CR8 3HCl (R);CR8, (R)-Isomer;(R)-CR8, 10 mM in DMSO;(R)?-?CR8/CR8/(R)-Isomer;(R)-CR8|||(R)-Isomer|||CR8;CR8, (R)-Isomer - CAS 294646-77-8 - Calbiochem;(R)-2-((9-Isopropyl-6-((4-(pyridin-2-yl)benzyl)amino)-9H-purin-2-yl)amino)butan-1-ol
CBNumber
CB32518863
Molecular Formula
C24H29N7O
Formula Weight
431.53
MOL File
294646-77-8.mol
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2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride Property

Melting point:
98-100℃
Boiling point:
671.4±65.0 °C(Predicted)
Density 
1.27±0.1 g/cm3(Predicted)
storage temp. 
2-8°C
solubility 
DMSO: ≥10mg/mL
form 
powder
pka
14.56±0.10(Predicted)
color 
off-white
Stability:
Stable for 2 years as supplied. Solutions in DMSO may be stored at -20°C for up to 1 month.
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Safety

Hazard Codes 
Xn
Risk Statements 
22
WGK Germany 
3
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
C3249
Product name
CR8
Purity
≥95% (HPLC)
Packaging
5mg
Price
$320.15
Updated
2025/07/31
Sigma-Aldrich
Product number
C3249
Product name
CR8
Purity
≥95% (HPLC)
Packaging
25mg
Price
$1350
Updated
2025/07/31
Cayman Chemical
Product number
14006
Product name
(R)-CR8
Purity
≥98%
Packaging
1mg
Price
$57
Updated
2024/03/01
Cayman Chemical
Product number
14006
Product name
(R)-CR8
Purity
≥98%
Packaging
10mg
Price
$275
Updated
2024/03/01
Cayman Chemical
Product number
14006
Product name
(R)-CR8
Packaging
5mg
Price
$179
Updated
2024/03/01
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2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride Chemical Properties,Usage,Production

Description

CR8 (294646-77-8) is a second generation analog of roscovitine which inhibits cyclin-dependent kinases with increased potency, Cdk1/cyclin B, Cdk2/cyclin A, Cdk2/cyclin E, Cdk5, p25, and Cdk9/cyclin T, IC50s=0.09, 0.072, 0.041, 0.11 and 0.18 μM respectively.1,2 Acts as a molecular glue degrader that depletes cyclin K.3 CR8 displays neuroprotective effects in various models including traumatic brain injury.4

Uses

CR8, (R)-Isomer is a cell-permeable, ATP-binding pocket-targeting CDK/CK1 dual-specific inhibitor.

Biochem/physiol Actions

CR8 is a potent and selective inhibitor of cyclin dependent kinase (CDK1, 2, 5, 7, and 9). CR8 is a more potent pyridyl analogue of roscovitine (Cat. No. R7772). In comparison to roscovirtine, the compound gains in potency toward CK1, which is involved in amyloid-β formation. The R-CR8 enantiomer is slightly more potent than S. CR8 is around 30 times more potent at cellular assay then roscovitine. Acts as a molecular glue to induce cyclin K degradation.

in vivo

(R)-CR8 (5?mg/Kg; i.p.) results in a significant reduction in lesion size at 28 days in histological assessment[2].

Animal Model:Adult (10 to 12 weeks old) male Sprague-Dawley rats (310 to 330?g)[2]
Dosage:i.p.
Administration:5?mg/Kg
Result:Resulted in a significant reduction in lesion size.

IC 50

Cdk1/cyclin B: 0.09 μM (IC50); cdk2/cyclin A: 0.072 μM (IC50); CDK2/cyclinE: 0.041 μM (IC50); Cdk5/p25: 0.11 μM (IC50); CDK7/cyclin H: 1.1 μM (IC50); CDK9/Cyclin T: 0.18 μM (IC50); CK1δ/ε: 0.4 μM (IC50)

References

[1] K BETTAYEB. CR8, a potent and selective, roscovitine-derived inhibitor of cyclin-dependent kinases[J]. Oncogene, 2008, 27 44: 5797-5807. DOI:10.1038/onc.2008.191
[2] KARIMA BETTAYEB. CDK Inhibitors Roscovitine and CR8 Trigger Mcl-1 Down-Regulation and Apoptotic Cell Death in Neuroblastoma Cells.[J]. Genes and Cancer, 2010, 1 4: 369-380. DOI:10.1177/1947601910369817
[3] MIKOŁAJ SŁABICKI. The CDK inhibitor CR8 acts as a molecular glue degrader that depletes cyclin K[J]. Nature, 2020, 585 7824: 293-297. DOI:10.1038/s41586-020-2374-x
[4] TARYN G AUBRECHT. Comparing effects of CDK inhibition and E2F1/2 ablation on neuronal cell death pathways in vitro and after traumatic brain injury.[J]. Cell Death & Disease, 2018: 1121. DOI:10.1038/s41419-018-1156-y

2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride Preparation Products And Raw materials

Raw materials

Preparation Products

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2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride Suppliers

China 77 United Kingdom 1 United States 9 Global 87
3B Pharmachem (Wuhan) International Co.,Ltd.
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821-50328103-801 18930552037
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86-21-50328109
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China
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Bide Pharmatech Ltd.
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400-164-7117 13681763483
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+86-21-61629029
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China
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Sigma-Aldrich
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021-61415566 800-8193336
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orderCN@merckgroup.com
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Shanghaizehan biopharma technology co., Ltd.
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021-61350663 13052117465
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EMMX Biotechnology LLC
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Shanghai EFE Biological Technology Co., Ltd.
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021-65675885 18964387627
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Shanghai YuanYe Biotechnology Co., Ltd.
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ShangHai Biochempartner Co.,Ltd
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177-54423994 17754423994
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Shanghai Rechem science Co., Ltd.
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021-31433387 15618786686
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Shanghai Chaolan Chemical Technology Center
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294646-77-8, 2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochlorideRelated Search:

Volasertib (BI 6727) Fruquintinib 3-[(Aminocarbonyl)amino]-5-(3-fluorophenyl)-N-(3S)-3-piperidinyl-2-Thiophenecarboxamide METHOPRENE ACID Cumene 3-Methyl-2-butanone 2-Chloropropane 2-Bromopropane

  • (R)-CR8
  • 2-(R)-(1-Ethyl-2-hydroxyethylamino)-6-(4-(2-pyridyl)benzyl)-9-isopropylpurinetrihydrochloride
  • 1-Butanol,2-[[9-(1-Methylethyl)-6-[[[4-(2-pyridinyl)phenyl]Methyl]aMino]-9H-purin-2-yl]aMino]-,(2R)-
  • (S)-CR8
  • (2R)-2-[[9-(1-Methylethyl)-6-[[[4-(2-pyridinyl)phenyl]methyl]amino]-9H-purin-2-yl]amino]-1-butanol
  • R8
  • CR8, (R)-Isomer
  • (2R)-2-[[9-(1-Methylethyl)-6-[[[4-(2-pyridinyl)phenyl]methyl]amino]-9H-purin-2-yl]amino]-butanol-1
  • (R)-2-(1-Hydroxybut-2-ylamino)-6-[4-(2-pyridyl)phenylmethylamino]-9-iso-propylpurine
  • CR8, (R)-Isomer - CAS 294646-77-8 - Calbiochem
  • (R)-2-((9-Isopropyl-6-((4-(pyridin-2-yl)benzyl)amino)-9H-purin-2-yl)amino)butan-1-ol
  • CR8 3HCl (R)
  • Inhibitor,(R)??CR8,caspases,Cyclin dependent kinase,lesion,death,inhibit,cell,(R)?-?CR-8,CDK,CR8, (R)-Isomer,(R)?-?CR8,(R)? ?CR8,Hippocampus,neuroprotective,Apoptosis,PARP
  • (R)?-?CR8/CR8/(R)-Isomer
  • (R)-CR8|||(R)-Isomer|||CR8
  • (R)-CR8, 10 mM in DMSO
  • 294646-77-8
  • C24H29N7O3HCl