| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5203656 | Polymer Degradation and Stability | 2010 | 6 Pages |
Abstract
4-13C-isoprene was prepared by the Wittig reaction. All reaction steps were optimised using unlabelled compounds. By reaction with triphenyl phosphine, 13C labelled methyl iodide afforded labelled methyl-triphenyl phosphine iodide in 84% yield. This reacted with meth acrolein with production of 4-13C-isoprene in 64% yield. Labelled polyisoprene was prepared by anionic polymerisation initiated by t-butyl lithium. Based on 13CH3I the overall yield is ca 30%. The polymer was characterized by 1H and 13C NMR spectroscopy. The contribution of each microstructure was [cis 1-4, 72%]; [trans 1-4, 10%]; [3-4, 18%].
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Jean-François Pilichowski, Myriam Morel, Farba Tamboura, Stefan Chmela, Mohamed Baba, Jacques Lacoste,