4-[2-[2-(2-Methoxyethoxy)ethoxy]ethoxy]benzaldehyde is a benzaldehyde-functionalized, poly(ethylene glycol)–type ether linker featuring a para-substituted aldehyde that can serve as a reactive handle for PROTAC assembly. The extended, flexible oligo(ethylene glycol) chain provides conformational mobility and hydrophilicity, which can help reduce steric constraints and improve solubility of conjugates during synthesis and biological evaluation. In targeted protein degradation workflows, this aldehyde group is well suited for forming reversible or covalent linkages with complementary amine-bearing warheads or ubiquitin-recruiting ligands, enabling controlled spatial positioning between the two binding domains. By acting as a modular spacer, the linker can tune effective interdomain distance and orientation, thereby influencing ternary complex formation and degradation potency. This compound is therefore valuable for researchers optimizing linker length and physicochemical properties in PROTAC design, particularly when solubility and flexibility are key determinants of experimental success.
Structure of 153364-63-7
* For research and manufacturing use only. Not for human or clinical use.
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This benzaldehyde-functional linker is designed to enable efficient assembly of PROTAC constructs by providing a chemically addressable aldehyde handle for conjugation to ligand scaffolds. Its poly(ethylene glycol)-like ether character supports conformational flexibility and improved solubility of linker–ligand hybrids, which can be beneficial for targeted protein degradation workflows. The detailed structural and reactivity considerations are provided below to support experimental design and coupling strategy selection.
Structure: The molecule is a benzaldehyde-bearing aromatic core substituted with an oligo(ethylene glycol) ether chain. It contains an aldehyde functional group, multiple ether linkages, and a phenyl ring, with polar ether oxygen atoms that promote hydrogen-bonding and favorable solvation behavior.
Reactivity: The aldehyde group is suitable for standard PROTAC linker conjugation routes that rely on aldehyde electrophilicity, including reductive amination with primary amines to form stable secondary amines. Typical conditions use amine partners, mild reducing agents, and polar organic solvents; reaction performance is often improved by controlling pH and minimizing competing hydrolysis or oxidation.
* Our calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2
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