BIODEGRADABLE ORGANIC RADICAL-FUNCTIONALIZED POLYCARBONATES FOR MEDICAL APPLICATIONS
申请人:International Business Machines Corporation
公开号:US20160220705A1
公开(公告)日:2016-08-04
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).
CYCLIC CARBONYL COMPOUNDS WITH PENDANT CARBONATE GROUPS, PREPARATIONS THEREOF, AND POLYMERS THEREFROM
申请人:Fujiwara Masaki
公开号:US20110269917A1
公开(公告)日:2011-11-03
A one pot method of preparing cyclic carbonyl compounds comprising an active pendant pentafluorophenyl carbonate group is disclosed. The cyclic carbonyl compounds can be polymerized by ring opening methods to form ROP polymers comprising repeat units comprising a side chain pentafluorophenyl carbonate group. Using a suitable nucleophile, the pendant pentafluorophenyl carbonate group can be selectively transformed into a variety of other functional groups before or after the ring opening polymerization.
N'-dioxide-Sc(III) complex catalysts. The BV oxidations of prochiral cyclohexanones and cyclobutanones afforded series of optically active ε- and γ-lactones, respectively, in up to 99% yield and 95% ee. Meanwhile, the kinetic resolution of racemic 2-arylcyclohexanones was also realized via an abnormal BV oxidation. Enantioenriched 3-aryloxepan-2-ones, whose formation is counter to the migratoryaptitude, were
POLYMERS BEARING PENDANT PENTAFLUOROPHENYL ESTER GROUPS, AND METHODS OF SYNTHESIS AND FUNCTIONALIZATION THEREOF
申请人:Fujiwara Masaki
公开号:US20100305281A1
公开(公告)日:2010-12-02
A one pot method of preparing cyclic carbonyl compounds comprising an active pendant pentafluorophenyl ester group is disclosed. The cyclic carbonyl compounds can be polymerized by ring opening methods to form ROP polymers comprising repeat units comprising a side chain pentafluorophenyl ester group. Using a suitable nucleophile, the pendant pentafluorophenyl ester group can be selectively transformed into a variety of other functional groups before or after the ring opening polymerization.
[EN] CYCLIC CARBONYL COMPOUNDS WITH PENDANT PENTAFLUOROPHENYL CARBONATE GROUPS, PREPARATIONS THEREOF, AND POLYMERS THEREFROM<br/>[FR] COMPOSÉS CARBONYLÉS CYCLIQUES AVEC GROUPEMENTS PENTAFLUOROPHÉNYLCARBONATE PENDANTS, LEURS SYNTHÈSES ET LEURS POLYMÈRES
申请人:IBM
公开号:WO2011135046A1
公开(公告)日:2011-11-03
A one pot method of preparing cyclic carbonyl compounds comprising an active pendant pentafluorophenyl carbonate group is disclosed. The cyclic carbonyl compounds can be polymerized by ring opening methods to form ROP polymers comprising repeat units comprising a side chain pentafluorophenyl carbonate group. Using a suitable nucleophile, the pendant pentafluorophenyl carbonate group can be selectively transformed into a variety of other functional groups before or after the ring opening polymerization.