Anti liver disease drug R-YEEE and method of synthesizing branched galactose-terminal glycoproteins
First Claim
Patent Images
1. A method of synthesizing branched galactose-terminal glycoprotein comprising the steps of:
- coupling an amino alcohol with a chemically protected ester of a dicarboxylic acid, which dicarboxylic acid is selected from the group consisting of glutamic and aspartic acids to produce A;
reacting A with the oxazoline of N-acetyl galactosamine to produce the amino acid derivative B;
reacting a 1,3 diacetate of N-acetyl galatosamine with a monobenzyl ester of a dicarboxylic acid selected from the group consisting of succinic, glutaric, adipic, maleic and fumaric acids to produce C;
reacting C with a chemically protected amino alkyl alcohol to produce D;
attaching D to an amide resin;
reacting the attached D with B to form E that is attached to the amide resin;
reacting the attached E with an amino acid having a chemically protected amino group;
deprotecting and cleaving from the resin to form the branched galactose-terminal glycoprotein.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a novel method of synthesizing branched galactose-terminal glycoproteins. A number of these glycoproteins have binding affinity to the asialoglycoprotein receptor. The present invention also provides novel conjugates having branched galactose-terminal glycoproteins that is complexed to a therapeutically effective agent, such as an isolated protein, polysacharides, lipids and radioactive isotope. These conjugates may be used to deliver the therapeutically effective agent to mammalian cells generally, and to hepatocytes specifically.
36 Citations
30 Claims
-
1. A method of synthesizing branched galactose-terminal glycoprotein comprising the steps of:
-
coupling an amino alcohol with a chemically protected ester of a dicarboxylic acid, which dicarboxylic acid is selected from the group consisting of glutamic and aspartic acids to produce A;
reacting A with the oxazoline of N-acetyl galactosamine to produce the amino acid derivative B;
reacting a 1,3 diacetate of N-acetyl galatosamine with a monobenzyl ester of a dicarboxylic acid selected from the group consisting of succinic, glutaric, adipic, maleic and fumaric acids to produce C;
reacting C with a chemically protected amino alkyl alcohol to produce D;
attaching D to an amide resin;
reacting the attached D with B to form E that is attached to the amide resin;
reacting the attached E with an amino acid having a chemically protected amino group;
deprotecting and cleaving from the resin to form the branched galactose-terminal glycoprotein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of synthesizing branched galactose-terminal glycoprotein comprising the steps of:
-
coupling an amino alcohol with a chemically protected ester of a dicarboxylic acid, which dicarboxylic acid is selected from the group consisting of glutamic and aspartic acids, to produce A;
reacting A with the oxazoline of the N-acetyl galactosamine to produce the amino acid derivative B;
attaching B to an amide resin;
reacting the attached B with unattached B to form C that is attached to the amide resin;
reacting the attached C with an amino acid having a chemically protected amino group;
deprotecting and cleaving from the resin to form the branched galactose-terminal glycoprotein.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
- 21. The branched galactose terminal glycoprotein having the following chemical structure:
Specification