Azlactone activated polyalkylene oxides
First Claim
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1. A water-soluble, hydrolytically-stable, azlactone-activated polyalkylene oxide, comprising a structure represented by:
- ##STR9## wherein R represents the non-terminal portion of a water-soluble polyalkylene oxide having a number average molecular weight between about 600 and about 100,000 daltons;
L is selected from the group consisting of --O-- and --CH2 --;
R1 is a moiety selected from the group consisting of hydrogen, alkyl and cycloalkyl moieties, carbocyclic and heterocyclic aromatic rings and α
, β
-unsaturated alkyl moieties;
R4 and R5 are moieties independently selected from the group consisting of hydrogen, alkyl, aryl and alkylaryl moieties; and
X is a terminal moiety of said polyalkylene oxide selected from the group consisting of alkoxy moieties containing up to four carbon atoms.
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Abstract
Water-soluble azlactone activated polyalkylene oxides having improved hydrolytic stability and conjugates of the azlactone activated polyalkylene oxides with biologically active nucleophiles are disclosed. Methods of forming and conjugating the activated polyalkylene oxides with biologically active nucleophiles are also disclosed.
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9 Claims
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1. A water-soluble, hydrolytically-stable, azlactone-activated polyalkylene oxide, comprising a structure represented by:
- ##STR9## wherein R represents the non-terminal portion of a water-soluble polyalkylene oxide having a number average molecular weight between about 600 and about 100,000 daltons;
L is selected from the group consisting of --O-- and --CH2 --; R1 is a moiety selected from the group consisting of hydrogen, alkyl and cycloalkyl moieties, carbocyclic and heterocyclic aromatic rings and α
, β
-unsaturated alkyl moieties;R4 and R5 are moieties independently selected from the group consisting of hydrogen, alkyl, aryl and alkylaryl moieties; and X is a terminal moiety of said polyalkylene oxide selected from the group consisting of alkoxy moieties containing up to four carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- ##STR9## wherein R represents the non-terminal portion of a water-soluble polyalkylene oxide having a number average molecular weight between about 600 and about 100,000 daltons;
Specification