Title:
POLYMERIZATION OF CYCLIC AMIDES USING N-HETEROCYCLIC CARBENE AND METAL AMIDE AND METAL ALKOXIDE CATALYSTS
Document Type and Number:
WIPO Patent Application WO2006053077
Kind Code:
A3
Abstract:
Mixtures or adducts of N-heterocyclic carbenes with metal amides or metal alkoxides are effective catalysts for the polymerization of cyclic amides. The catalysts are stable at polymerization temperatures, and the polymerization is rapid, resulting in high monomer conversion, high molecular weight, and a mechanically sound material.
Inventors:
TAM WILSON (US)
WILLIAMSON DAVID T (US)
WILLIAMSON DAVID T (US)
Application Number:
PCT/US2005/040643
Publication Date:
October 19, 2006
Filing Date:
November 09, 2005
Export Citation:
Assignee:
DU PONT (US)
TAM WILSON (US)
WILLIAMSON DAVID T (US)
TAM WILSON (US)
WILLIAMSON DAVID T (US)
International Classes:
C08G69/20
Foreign References:
| DE1953899A1 | 1971-05-06 |
Other References:
G.W. NYCE, E.A.: "In situ generation of carbenes: a general and versatile platform for organocatalytic living polymerization.", J.AM.CHEM.SOC., vol. 125, no. 10, 2003, pages 3046 - 3056, XP002391566
A. KLAPARS, E.A., J. AM. CHEM. SOC., vol. 126, no. 11, 2004, Synthesis of medium ring nitrogen heterocycles via a tandem copper-catalyzed C-N bond formation - Ring-expansion process, pages 3529 - 3533, XP002392150
S. ELDRED, E.A.: "Catalytic transamidation under moderate conditions", J. AM. CHEM. SOC., vol. 125, no. 12, 2003, pages 3422 - 3423, XP002392166
J. CHENG, E.A.: "Controlled polymerization of beta-lactams using metal-amido complexes: Synthesis of block copoly(beta-peptides)", J. AM. CHEM. SOC., vol. 123, no. 38, 2001, pages 9457 - 9458, XP002392151
A. KLAPARS, E.A., J. AM. CHEM. SOC., vol. 126, no. 11, 2004, Synthesis of medium ring nitrogen heterocycles via a tandem copper-catalyzed C-N bond formation - Ring-expansion process, pages 3529 - 3533, XP002392150
S. ELDRED, E.A.: "Catalytic transamidation under moderate conditions", J. AM. CHEM. SOC., vol. 125, no. 12, 2003, pages 3422 - 3423, XP002392166
J. CHENG, E.A.: "Controlled polymerization of beta-lactams using metal-amido complexes: Synthesis of block copoly(beta-peptides)", J. AM. CHEM. SOC., vol. 123, no. 38, 2001, pages 9457 - 9458, XP002392151
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