Heterobifunctional PEG with Crown Ether and Halogen Ends
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Solution Overview
Problem
There is a need for heterobifunctionalized poly(ethylene glycol) (PEG) compounds with various terminal functional groups to enhance the therapeutic applications, particularly in pharmaceutical and biomedical fields, where PEGylation is used to improve aqueous solubility and biodistribution profiles of hydrophobic drugs and biological molecules.
Innovation Solution
The development of compounds with specific functional groups, such as crown ethers, halogens, and detectable moieties, attached to PEG chains, allowing for versatile terminal modifications that can react with different substrates and molecules, facilitating improved solubility and delivery mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PEG compounds with various terminal functional groups are developed, then the versatility and adaptability for different therapeutic applications are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The PEG compound is divided into distinct functional segments: a central PEG chain and separate terminal functional groups (e.g., crown ether at one end, halogen or detectable moiety at the other). This segmentation allows each end to perform specific functions independently, enhancing versatility while maintaining a modular structure that simplifies conceptual understanding and manufacturing planning.
Solution Approach 2:
The patent creates universal heterobifunctionalized PEG compounds that can serve multiple therapeutic purposes through their diverse terminal groups. The crown ether group provides one function (e.g., metal ion binding), while the halogen or detectable moiety provides another (e.g., conjugation or detection), making a single compound adaptable to various applications without requiring multiple specialized compounds.
2Adaptability or versatility
If specific functional groups are attached to PEG chains for versatile terminal modifications, then the ability to react with different substrates is improved, but the manufacturing precision and ease of manufacture deteriorate
Solution Approach 1:
The functional groups (crown ether, halogen, detectable moiety) are pre-attached to the PEG chain during the polymerization process or through controlled post-polymerization modifications. This preliminary action ensures that the functional groups are positioned at the terminals with correct orientation and spacing, enabling subsequent reactions with different substrates without requiring complex post-processing steps.
Solution Approach 2:
The patent utilizes changes in chemical parameters during synthesis (e.g., initiator selection, reaction conditions, stoichiometry) to control the attachment of specific functional groups at PEG terminals. By adjusting these parameters, the manufacturing process achieves the required precision for functional group placement while maintaining flexibility in choosing different functional groups for different applications.
Data Source
AI summary
The present invention provides bifunctional polymers, methods of preparing the same, and intermediates thereto. These compounds are useful in a variety of applications including the PEGylation of biologically active molecules. The invention also provides methods of using said compounds and compositions thereof.