Transition metal initiators for controlled poly (beta-peptide) synthesis from beta-lactam monomers
AssigneeThe Regents of the University of California
InventorsTimothy J. Deming, Jianjun Cheng
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Abstract
A series of initiators based on transition metal complexes for the polymerization of optically active beta-lactams into poly-beta-peptides and block copolymers have been developed. These initiators are unique in being able to eliminate chain transfer and chain termination side reactions from these polymerizations resulting in narrow molecular weight distributions, molecular weight control, and the ability to prepare copolymers of defined block sequence and composition.
Claims40
A method of making a poly(β-peptide) comprising, combining a beta lactam monomer and a transition metal complex, said complex comprising a transition metal and a nucleophilic ligand, for a time and under conditions effective to polymerize the beta lactam monomer and to form the poly(β-peptide).
A composition of matter comprising a beta lactam monomer and a transition metal complex, said complex comprising a transition metal and a nucleophilic ligand.
A composition of matter made by combining a beta lactam monomer and a transition metal complex, said complex comprising a transition metal and a nucleophilic ligand.
A poly(β-peptide) having the formula:
- wherein R is an alkyl, aryl, oligo-ethylene glycol monomethyl, or side-chain protecting group and n is about 5 to about 200.
A method of making a metalated lactam comprising, combining a beta lactam monomer and a transition metal complex, said complex comprising a transition metal and a reactive nucleophilic ligand, for a time and under conditions effective liberate a reactive ligand and to form the metalated lactam.
A method of making a block copoly (β-peptide) comprising:
- combining a first beta lactam monomer and a transition metal complex, said complex comprising a transition metal and a nucleophilic ligand, in a reaction mixture, for a time and under conditions effective to polymerize the first beta lactam monomer and to form a first block of the block copoly (β-peptide);
- and
- adding a second beta lactam monomer to the reaction mixture, wherein the second monomer is different from the first monomer, for a time and under conditions effective to polymerize the second beta lactam monomer and to form a second block of the block copoly (β-peptide).
A block copoly (β-peptide) comprising a first block and a second block attached to the first block, the first block having ten or more identical first beta amino acid residues and the second block having ten or more identical second beta amino acid residues, wherein the second beta amino acid residues are different than the first beta amino acid residues.
Dependencies are inferred from the claim text.