Catalytic cyclopropanation of polybutadienes
Catalytic cyclopropanation of commercial 1,2- or 1,4- cis -polybutadiene, respectively, with ethyl diazoacetate catalyzed by [Tp Br3 Cu(NCMe)] (Tp Br3 ¼ hydrotris(3,4,5-tribromo-1-pyrazo- lyl)borate) at room temperature afforded high molecular weight ( M n > 10 5 mol 1 ) side-chain or main-ch...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2010 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/10964 |
| Acceso en línea: | http://hdl.handle.net/10272/10964 |
| Access Level: | acceso abierto |
| Palabra clave: | Carbene addition Catalysis Functionalization of polymers Organometallic catalysis Polar groups Polybutadienes |
| Sumario: | Catalytic cyclopropanation of commercial 1,2- or 1,4- cis -polybutadiene, respectively, with ethyl diazoacetate catalyzed by [Tp Br3 Cu(NCMe)] (Tp Br3 ¼ hydrotris(3,4,5-tribromo-1-pyrazo- lyl)borate) at room temperature afforded high molecular weight ( M n > 10 5 mol 1 ) side-chain or main-chain, respectively, carbox- yethyl cyclopropyl-substituted polymers with variable and con- trolled degrees of functionalization. Complete functionalization of 1,4- cis -polybutadiene afforded poly[ethylene-alt-(3-ethoxycar- bonyl-cyclopropene)]. Catalytic hydrogenation of residual dou- ble bonds of partially cyclopropanated polybutadienes provided access to the corresponding saturated polyolefins. Thermal properties are reported. |
|---|