Invention Grant
- Patent Title: Reacting polyalkylene oxide with base, tertiary alkyl haloacetate, then acid to prepare polyalkylene oxide carboxylic acid
- Patent Title (中): 制备聚环氧烷羧酸的高效方法
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Application No.: US11328662Application Date: 2006-01-10
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Publication No.: US07989554B2Publication Date: 2011-08-02
- Inventor: Hong Zhao , Anthony J. Martinez
- Applicant: Hong Zhao , Anthony J. Martinez
- Applicant Address: US NJ Bridgewater
- Assignee: Enzon Pharmaceuticals, Inc.
- Current Assignee: Enzon Pharmaceuticals, Inc.
- Current Assignee Address: US NJ Bridgewater
- Agency: Lucas & Mercanti, LLP
- Main IPC: A61K47/12
- IPC: A61K47/12 ; C08G65/332 ; C08L71/02
Abstract:
A new method of preparing a tertiary alkyl ester of a polyalkylene oxide is provided. The new method employs milder conditions that avoid the back reaction to the starting polyalkylene oxide. The tertiary alkyl ester of a polyalkylene oxide is then reacted with a suitable acid to produce a polyalkylene oxide acid.
Public/Granted literature
- US20070173615A1 High efficiency method of preparing polyalkylene oxide carboxylic acids Public/Granted day:2007-07-26
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