| | Identification | Back Directory |  | [Name] 
 Acid-PEG2-t-butyl ester
 |  | [CAS] 
 2086688-99-3
 |  | [Synonyms] 
 COOH-PEG2-OtBu
 Acid-PEG2-C2-Boc
 t-butyl ester-PEG1-acid
 Acid-PEG2-t-butyl ester
 3-(2-(3-(tert-Butoxy)-3-oxopropoxy)ethoxy)propanoic acid
 3-[2-(2-Carboxyethoxy)ethoxy]propanoic acid tert-butyl ester
 Propanoic acid, 3-[2-(2-carboxyethoxy)ethoxy]-, 1-(1,1-dimethylethyl) ester
 |  | [Molecular Formula] 
 C12H22O6
 |  | [MDL Number] 
 MFCD30723272
 |  | [MOL File] 
 2086688-99-3.mol
 |  | [Molecular Weight] 
 262.3
 | 
 | Chemical Properties | Back Directory |  | [Boiling point ] 
 384.3±27.0 °C(Predicted)
 |  | [density ] 
 1.104±0.06 g/cm3(Predicted)
 |  | [solubility ] 
 Soluble in Water, DMSO, DMF
 |  | [form ] 
 Liquid
 |  | [pka] 
 4.27±0.10(Predicted)
 |  | [color ] 
 Colorless to light yellow
 |  | [InChI] 
 InChI=1S/C12H22O6/c1-12(2,3)18-11(15)5-7-17-9-8-16-6-4-10(13)14/h4-9H2,1-3H3,(H,13,14)
 |  | [InChIKey] 
 FVMOAKLTZMCDOV-UHFFFAOYSA-N
 |  | [SMILES] 
 C(OC(C)(C)C)(=O)CCOCCOCCC(O)=O
 | 
 | Hazard Information | Back Directory |  | [Description] 
 Acid-PEG2-t-butyl ester is a PEG linker containing a t-butyl protected carboxyl group with a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl protected carboxyl group can be deprotected under acidic conditions.
 |  | [Uses] 
 Acid-PEG2-C2-Boc is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1].
 |  | [IC 50] 
 PEGs; Alkyl/ether
 |  | [References] 
 [1] An S, et al. Small-molecule PROTACs: An emerging and promising approach for the development of targeted therapy drugs. EBioMedicine. 2018 Oct;36:553-562 DOI:10.1016/j.ebiom.2018.09.005
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