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Tos-PEG5-CH2CO2t-butyl ester, also known as Tos-PEG5-CH2CO2tBu, is a PEG (polyethylene glycol) linker that features a t-butyl ester and a tosyl group. This molecule is designed to enhance solubility in aqueous media due to the hydrophilic PEG spacer. The t-butyl protected carboxyl group can be deprotected under acidic conditions, allowing for further chemical modifications or reactions. The tosyl group serves as an excellent leaving group for nucleophilic substitution reactions, making it a versatile component in various chemical and biological applications.

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  • 169751-73-9 Structure
  • Basic information

    1. Product Name: Tos-PEG5-CH2CO2t-butyl ester
    2. Synonyms: Tos-PEG5-CH2CO2t-butyl ester;Tos-PEG4-CH2COOtBu;Tos-PEG5-CH2CO2tBu
    3. CAS NO:169751-73-9
    4. Molecular Formula: C21H34O9S
    5. Molecular Weight: 462.55426
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 169751-73-9.mol
  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: 550.0±50.0 °C(Predicted)
    3. Flash Point: N/A
    4. Appearance: /
    5. Density: 1.163±0.06 g/cm3(Predicted)
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: Tos-PEG5-CH2CO2t-butyl ester(CAS DataBase Reference)
    10. NIST Chemistry Reference: Tos-PEG5-CH2CO2t-butyl ester(169751-73-9)
    11. EPA Substance Registry System: Tos-PEG5-CH2CO2t-butyl ester(169751-73-9)
  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 169751-73-9(Hazardous Substances Data)

169751-73-9 Usage

Uses

Used in Chemical Synthesis:
Tos-PEG5-CH2CO2t-butyl ester is used as a PEG linker for chemical synthesis, providing a hydrophilic spacer that increases solubility in aqueous media. The t-butyl ester allows for selective deprotection under acidic conditions, enabling the introduction of various functional groups or molecules.
Used in Bioconjugation:
In the field of bioconjugation, Tos-PEG5-CH2CO2t-butyl ester is used as a versatile PEG linker to attach biologically active molecules, such as peptides, proteins, or small molecules, to a PEG chain. The tosyl group acts as a good leaving group for nucleophilic substitution reactions, facilitating the conjugation process.
Used in Drug Delivery Systems:
Tos-PEG5-CH2CO2t-butyl ester is used as a component in drug delivery systems, particularly for the development of targeted therapies. The PEG linker can improve the solubility and stability of drug molecules, while the t-butyl ester and tosyl group can be utilized for attaching the drug to the PEG chain or for further functionalization.
Used in Material Science:
In material science, Tos-PEG5-CH2CO2t-butyl ester is used as a building block for the development of novel materials with enhanced properties. The PEG linker can be incorporated into polymers, hydrogels, or other materials to improve their hydrophilicity, biocompatibility, and responsiveness to environmental stimuli.
Used in Analytical Chemistry:
Tos-PEG5-CH2CO2t-butyl ester is used as a reagent in analytical chemistry for the modification of surfaces or the development of new chromatographic stationary phases. The PEG linker can provide improved separation and detection of various analytes, while the t-butyl ester and tosyl group can be used for immobilization or further functionalization.

Check Digit Verification of cas no

The CAS Registry Mumber 169751-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,7,5 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 169751-73:
(8*1)+(7*6)+(6*9)+(5*7)+(4*5)+(3*1)+(2*7)+(1*3)=179
179 % 10 = 9
So 169751-73-9 is a valid CAS Registry Number.

169751-73-9Downstream Products

169751-73-9Relevant articles and documents

Gene coding compound library starting head fragment compound and application thereof in gene coding compound library synthesis

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Paragraph 0059-0061, (2021/11/14)

The invention provides a gene coding compound library starting head fragment compound and application thereof in synthesis of a gene coding compound library, and has good universality. The method is mild in condition, convenient to operate and high in yie

Discovery and biological evaluation of proteolysis targeting chimeras (PROTACs) as an EGFR degraders based on osimertinib and lenalidomide

He, Kailun,Wang, Wenbing,Wang, Xiaoju,Zhang, Xingxian,Zhang, Zhuo,Zheng, Xiaoliang

, (2020/04/21)

Epidermal growth factor receptor (EGFR) is one of the important and valuable drug targets. Overexpression of EGFR is associated with the development of many types of cancer. In this study, three PROTACs small molecules (16a–16c) were designed, synthesized and evaluated for their cytotoxicity against the growth in different NSCLC cell line and the degradation effect. The bioassay results indicated that 16c has a good inhibition in PC9 cells and H1975 cells, and the corresponding IC50 value was 0.413 μM and 0.657 μM, respectively. Western blotting results demonstrated that compound 16c could serve as an effective EGFRdel19-targeting degrader in PC9 cells.

Lenalidomide-based small-molecular compound targeting to EGFR protein degradation, and preparation and application thereof

-

Paragraph 0050; 0061; 0068; 0069; 0070, (2020/09/09)

The invention relates to a lenalidomide-based small-molecular compound targeting to EGFR protein degradation, and preparation and application thereof, and provides a compound targeting to ubiquitination induced EGFR protein degradation and shown as a form

AMIDE COMPOUND HAVING BET PROTEOLYSIS-INDUCING ACTION AND MEDICINAL APPLICATION THEREOF

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Paragraph 0369-0371; 0414-0416, (2020/01/31)

The present invention aims to provide a compound that: has an excellent cytotoxic action on cancer cells, excellent induction of BET protein degradation in cancer cells, and an excellent binding-inhibiting action on BET protein and acetylated histone; and is effective as an anti-cancer agent, a BET protein degradation-inducing agent, or a BET protein inhibiting agent. A compound indicated in general formula (I) or a pharmacologically acceptable salt thereof. {In the formula, each symbol is as outlined in the Description.}

Atorvastatin Derived HMG-CoA Reductase Degradation Inducing Compound

-

Paragraph 0509-0512, (2020/12/01)

The present invention relates to a HMG-CoA reductase degradation-inducing compound and, more specifically, to a bifunctional compound in which atorvastatin and E3 ubiquitin ligase binding moiety are chemically linked as HMG-CoA reductase binding moiety, to a production method thereof, to a HMG-CoA reductase degradation method using the same, and to a pharmaceutical composition for preventing or treating HMG-CoA reductase-related diseases, comprising the same.

Compound for targeted ubiquitin degradation of EGFR protein as well as pharmaceutical composition and application thereof

-

Paragraph 0043; 0061-0062, (2019/07/04)

The invention discloses a compound for targeted ubiquitin degradation of EGFR protein or a pharmaceutically acceptable salt thereof, and also discloses a pharmaceutical composition comprising the compound or a pharmaceutically acceptable salt thereof and

Identification and Characterization of von Hippel-Lindau-Recruiting Proteolysis Targeting Chimeras (PROTACs) of TANK-Binding Kinase 1

Crew, Andrew P.,Raina, Kanak,Dong, Hanqing,Qian, Yimin,Wang, Jing,Vigil, Dominico,Serebrenik, Yevgeniy V.,Hamman, Brian D.,Morgan, Alicia,Ferraro, Caterina,Siu, Kam,Neklesa, Taavi K.,Winkler, James D.,Coleman, Kevin G.,Crews, Craig M.

, p. 583 - 598 (2018/02/07)

Proteolysis targeting chimeras (PROTACs) are bifunctional molecules that recruit an E3 ligase to a target protein to facilitate ubiquitination and subsequent degradation of that protein. While the field of targeted degraders is still relatively young, the potential for this modality to become a differentiated and therapeutic reality is strong, such that both academic and pharmaceutical institutions are now entering this interesting area of research. In this article, we describe a broadly applicable process for identifying degrader hits based on the serine/threonine kinase TANK-binding kinase 1 (TBK1) and have generalized the key structural elements associated with degradation activities. Compound 3i is a potent hit (TBK1 DC50 = 12 nM, Dmax = 96%) with excellent selectivity against a related kinase IKK?, which was further used as a chemical tool to assess TBK1 as a target in mutant K-Ras cancer cells.

COMPOUNDS FOR THE MODULATION OF RIP2 KINASE ACTIVITY

-

, (2017/04/11)

The present invention relates to compounds, compositions, combinations and medicaments containing said compounds and processes for their preparation. The invention also relates to the use of said compounds, combinations, compositions and medicaments, for example as inhibitors of the activity of RIP2 kinase, including degrading RIP2 kinase, the treatment of diseases and conditions mediated by the RIP2 kinase, in particular for the treatment of inflammatory diseases or conditions.

Antithrombotic compound

-

, (2008/06/13)

The present invention relates compounds of the formula Aoligosaccharide-spacer-GpIIb/IIIa antagonist wherein the oligosaccharide is a negatively charged oligosaccharide residue comprising four to twenty five monosaccharide units, the charge being compensa

Synthese von massgeschneiderten Glycokonjugaten, die AT-III-vermittelt die Blutgerinnungsfaktoren Xa und Thrombin inhibieren

Westerduin, Pieter,Basten, Jan E. M.,Broekhoven, Marc A.,Kimpe, Vera de,Kuijpers, Will H. A.,Boeckel, Constant A. A.

, p. 339 - 342 (2007/10/03)

Keywords: Antithrombotica; Enzyminhibitoren; Heparin

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