Transition metal initiators for controlled poly (beta-peptide) synthesis from beta-lactam monomers
US6818732B2 · kind B2 · utility
43Cited by
5References
40Claims
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Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.