Investigations in the competition of the cleavage of the CCl bond of a telogen that exhibits both trichloromethyl and dichloromethylene groups for the redox telomerization of methylmethacrylate and ethylacrylate
✍ Scribed by C. Alfiguigui; B. Améduri; J.M. Bessiére; B. Boutevin
- Book ID
- 103075665
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 642 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
Abatrae-The redox telomerizations of ethylacrylate and methylmethacrylate with the 2,2,4,4,4pentachloromethylbutyrate catalyzed by copper salts or by RuCl,(PPh,), were investigated to obtain monodispersed telechelic oligomers. For both monomers, the expected linear products were produced in low yields mainly in the presence of the ruthenium complex. The difunctional telomers Cl,CCH,CCl(CO,CH,)CH,CXYCl where X = CH, (or X = H) and Y = CO,CH, or CO,C,H, were obtained as the major products. This was explained by the cleavage of the C-Cl bond of the dichloromethylene group, more activated by the ester group than the trichloromethyl one. The copper salts led to better yields than the ruthenium complex. The evidence of the formation of such products was given by 'H and "C NMR spectroscopy.