Scientists Create Snap-Together Degradable Plastics for Medical and Biotech Use
Researchers have developed a simple manufacturing method to produce plastic polymers that snap together with biological molecules at room temperature—without toxic solvents. The advance could accelerate development of biodegradable drug delivery systems, medical devices, and sustainable packaging, opening a faster, cheaper pathway to market for biotech companies.
Originaltitel: Synthesis of Click-Ready Aminooxy-Terminated Poly(e-caprolactone) Oligomers for Oxime Ligation
<p>Oxime ligation, a chemoselective coupling between carbonyl compounds and aminooxy groups, enables conjugation under mild and aqueous conditions. Here, we integrate this reaction with degradable polymers through a one-pot synthesis of aminooxy-functionalized poly(epsilon-caprolactone) (PCL) oligomers. The bifunctional initiator 6-(tert-butyloxycarbonylaminooxy)-1-hexanol was employed for simultaneous epsilon-caprolactone ring-opening polymerization and in situ Boc-deprotection catalyzed by methanesulfonic acid (MSA). Optimized conditions afforded &gt;95% conversion for both reactions, while maintaining well-defined oligomer structures (DP = 5-20). The resulting NH3+-O-PCL oligomers underwent rapid and efficient oxime ligation with a diverse set of aldehydes and ketones, achieving &gt;90% conversion within 1-2 h at room temperature. Reactions proceeded effectively even in mixed aqueous solvents (H2O/MeOH/CHCl3 = 1:3:1), for example, with the reducing ends of glucose and xylose. This work establishes a straightforward, water-tolerant synthetic platform for preparing "click-ready" degradable polymers, enabling broad integration with biobased and functional substrates.</p>