Isolatable, water soluble, and hydrolytically stable active sulfones of poly(ethylene glycol) and related polymers for modification of surfaces and molecules
First Claim
1. An activated poly(ethylene glycol) derivative having the structure:
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space="preserve" listing-type="equation">R--CH.sub.2 CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n --Ywherein n equals 5 to 3,000, Y is --SO2 --CH═
CH2, and R is selected from the group consisting of HO--, H3 CO--, X--CH2 --CH2 --SO2 --, where X is halogen, and CH2 ═
CH--SO2 --.
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Accused Products
Abstract
A poly(ethylene glycol) derivative is disclosed that is activated with a sulfone moiety for selective attachment to thiol moieties on molecules and surfaces. The activated PEG is water soluble, hydrolytically stable for extended periods, and forms hydrolytically stable linkages with thiol moieties. The linkages generally are not reversible in reducing environments. The PEG derivative is useful for modifying the characteristics of substances including modifying biologically active molecules and surfaces for biocompatibility. Methods for synthesizing the active PEG and for preparing conjugates of the active PEG and other substances, including biologically active substances, are also disclosed.
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Citations
25 Claims
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1. An activated poly(ethylene glycol) derivative having the structure:
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space="preserve" listing-type="equation">R--CH.sub.2 CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n --Ywherein n equals 5 to 3,000, Y is --SO2 --CH═
CH2, and R is selected from the group consisting of HO--, H3 CO--, X--CH2 --CH2 --SO2 --, where X is halogen, and CH2 ═
CH--SO2 --. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An activated poly(ethylene glycol) derivative having the structure:
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space="preserve" listing-type="equation">CH.sub.3 --(OCH.sub.2 CH.sub.2).sub.n --SO.sub.2 --CH═
CH.sub.2wherein n equals 5 to 3,000.
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11. An activated poly(ethylene glycol) derivative having the structure:
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space="preserve" listing-type="equation">CH.sub.2 ═
CH--SO.sub.2 --CH.sub.2 --CH.sub.2 --(OCH.sub.2 CH.sub.2)hd n--SO.sub.2 --CH═
CH.sub.2wherein n equals 5 to 3,000.
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12. A hydrolytically stable, biologically active conjugate that is the reaction product of 1) at least one biologically active molecule having the structure W-SH, wherein W- is a biologically active moiety and --SH is a reactive thiol moiety, and 2) a poly(ethylene glycol) derivative activated with one or more sulfone moieties and having the structure:
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space="preserve" listing-type="equation">R--CH.sub.2 --CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n --Ywherein n equals 5 to 3,000, Y is --SO2 --CH═
CH2, and R is selected from the group consisting of HO--, H3 CO--, X--CH2 --CH2 --SO2 --, wherein X is halogen, and CH2 ═
CH`SO2 --, and wherein said reactive thiol moiety is linked to said at least one active sulfone moiety. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for preparing poly(ethylene glycol) vinyl sulfone comprising the steps of:
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(a) reacting poly(ethylene glycol) having at least one active hydroxyl moiety with a compound to form either an ester or a halide substituted poly(ethylene glycol); (b) reacting the ester or a halide substituted poly(ethylene glycol) of step (a) with mercaptoethanol to substitute the mercaptoethanol radical for the ester or halide moiety; (c) reacting the mercaptoethanol substituted poly(ethylene glycol) of step (b) with an oxidizing agent to oxide sulfur in the mercaptoethanol moiety to sulfone; (d) reacting the sulfone of step (c) with a compound to convert the hydroxyl of the mercaptoethanol moiety to an ester or halide moiety; (e) reacting the ethyl sulfone of step (d) with base to form poly(ethylene glycol) vinyl sulfone. - View Dependent Claims (19, 20, 21)
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22. A method for preparing a biologically active conjugate of at least one biologically active molecule having the structure W-SH, wherein W-- is a biologically active moiety and --SH is an active thiol moiety, and an activated poly(ethylene glycol) derivative having at least one active sulfone moiety, the activated poly(ethylene glycol) derivative having the structure R--CH2 CH2 --(OCH2 CH2)n --Y, wherein n equals 5 to 3,000, Y is --SO2 --CH═
- CH2, and R is selected from the group consisting of HO--, H3 CO--, X--CH2 --CH2 --SO2 --, wherein X is halogen, and CH2 ═
CH--SO2 --, said method comprising the steps of reacting the biologically active molecule with the activated poly(ethylene glycol) derivative and forming a linkage between the active thiol moiety and the at least one active sulfone moiety of the poly(ethylene glycol). - View Dependent Claims (23)
- CH2, and R is selected from the group consisting of HO--, H3 CO--, X--CH2 --CH2 --SO2 --, wherein X is halogen, and CH2 ═
- 24. A method for preparing a biologically active conjugate having the structure
- space="preserve" listing-type="equation">protein-S--CH.sub.2 --CH.sub.2 --SO.sub.2 --CH.sub.2 --CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n --SO.sub.2 --CH.sub.2 --CH.sub.2 --S-protein,
wherein n equals 5 to 3,000, the method comprising the steps of
1) reacting at least one protein having an active thiol moiety with a sulfone activated poly(ethylene glycol) derivative having the structure R--CH2 CH2 --(OCH2 CH2)n --SO2 --CH═
CH2, wherein R is selected from the group consisting of CH2 ═
CH--SO2 -- and X--CH2 --CH2 --SO2 --, and wherein X is halogen, and
2) forming a linkage between the active thiol moiety of the protein and the active sulfone moieties of the activated polymer.
- 25. A method for preparing a biologically active conjugate having the structure
- space="preserve" listing-type="equation">H.sub.3 CO--CH.sub.2 --CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n --SO.sub.2 --CH.sub.2 --CH.sub.2 --S-protein
wherein n equals 5 to 3,000, the method comprising the steps of
1) reacting a protein having an active thiol moiety with an activated poly(ethylene glycol) derivative having the structure H2 CO--CH2 --CH2 --(OCH2 CH2)n --SO2 --CH═
CH2, and
2) forming a linkage between the active thiol moiety of the protein and the active sulfone moiety of the activated polymer.
Specification