Biodegradable organic radical-functionalized polycarbonates for medical applications

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United States of America Patent

PATENT NO 9718957
SERIAL NO

14609778

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Abstract

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Paramagnetic, amphiphilic, biocompatible polymers were prepared comprising a carbonate repeat unit bearing a paramagnetic organic radical, more specifically a nitroxyl radical. The radical polymers can be produced in one step from a precursor polymer bearing an active ester side chain by treating the precursor polymer with a radical-bearing nucleophile. The precursor polymer can be prepared by organocatalyzed catalyzed ring opening polymerization (ROP) of a cyclic carbonate monomer bearing an active ester side chain. The radical polymers can be non-toxic and partially biodegradable. The radical polymers have utility as contrast enhancing agents in a medical imaging application and/or as therapeutic agents for treating a medical condition. The radical polymers can also serve as carriers for therapeutic agents (e.g., drugs) and/or medical image enhancing agents (e.g., NIRF dyes).

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Patent Owner(s)

  • AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH;INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chan, Julian M W Fremont, US 11 26
Hedrick, James L Pleasanton, US 294 1238
Lee, Ashlynn L Z Singapore, SG 11 35
Wojtecki, Rudy J San Jose, US 156 705
Yang, Yi Yan Singapore, SG 115 482

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