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Active carbonates of polyalkylene oxides for modification of polypeptides

  • US 5,122,614 A
  • Filed: 04/19/1990
  • Issued: 06/16/1992
  • Est. Priority Date: 04/19/1989
  • Status: Expired due to Term
First Claim
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1. A compound having the structure:

  • ##STR8## wherein R1 is H--, H3 C--, or an oxycarbonyl-N-dicarboximide group;

    wherein each R2, R3, and R4 is an alkyl group which may be straight or branched, and wherein each R2, R3, and R4 may be independently the same as, or different from, the others of R2, R3, and R4 ;

    wherein R5 is an N-dicarboximide group; and

    wherein a is an integer between 1 and 1000 and each of b and c is an integer between 0 and 1000, and the sum of a, b, and c is between 10 and 1000.

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