| | Identification | Back Directory |  | [Name] 
 N3-PEG4-tBu
 |  | [CAS] 
 581066-04-8
 |  | [Synonyms] 
 N3-PEG4-tBu
 581066-04-8
 Azido-PEG4-Boc
 Azido-PEG4-COOtBu
 N3-PEG4-CH2CH2COOtBu
 N3-?PEG4-?t-?butyl ester
 Azido-PEG5-t-butyl ester
 15-Azido-4,7,10,13-tetraoxapentadecanoic acid 1,1-dimethylethyl ester
 N3-PEG4-CH2CH2COOtBu
 |  | [Molecular Formula] 
 C15H29N3O6
 |  | [MDL Number] 
 MFCD18916988
 |  | [MOL File] 
 581066-04-8.mol
 |  | [Molecular Weight] 
 347.407
 | 
 | Hazard Information | Back Directory |  | [Description] 
 Azido-PEG4-t-butyl ester is a click chemistry linker containing an azide (N3) and a t-butyl ester moiety. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group is reactive toward alkyne, BCN, DBCO via Click Chemistry . The t-butyl protected carboxyl group can be deprotected under acidic conditions.
 |  | [Uses] 
 Azido-PEG4-Boc is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1]. Azido-PEG4-Boc is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
 |  | [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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