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US 2010/0063328 A1Published application
Heterobifunctional poly(ethylene glycol) derivatives and methods for their preparation
AssigneeNektar Therapeutics
InventorsMichael D. Bentley, J. Milton Harris, Antoni Kozlowski
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Abstract
This invention provides a method related to the preparation of derivatives of poly(ethylene glycol).
Claims10
A method comprising increasing the pH of an aqueous composition comprising a poly(ethylene glycol) bearing a —O—(CH2)n—CO2R3 functional group to result in a aqueous composition comprising a poly(ethylene glycol) bearing a —O—(CH2)n—CO2H functional group, wherein R3 is alkyl and (n) in each instance is 1-6.
Dependencies are inferred from the claim text.