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Issue 8, 2010
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Investigation into thiol-(meth)acrylate Michael addition reactions using amine and phosphine catalysts

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Abstract

This work describes a study into thiolene based Michael addition reactions. Different catalysts, primary and tertiary amines and phosphines, were investigated for the reaction of a range of thiols with dimers and oligomers of some (meth)acrylates. Primary and tertiary amines are efficient catalysts for the thiolene reaction, although these catalysts require several hours to reach high conversion. Moreover, the phosphine catalysts, dimethylphenylphosphine (DMPP) and tris-(2-carboxyethyl)phosphine (TCEP), were investigated in detail. DMPP is an efficacious catalyst yielding complete conversion in few minutes under optimized conditions. Importantly, the concentration of DMPP should be kept at catalytic levels to avoid the formation of by-products, originating from the addition of DMPP to the vinyl group. Furthermore, TCEP is an efficient catalyst for thiolene reactions in aqueous media when the pH of the medium is higher than 8.0 since at acidic pH the formation of by-products is observed.

Graphical abstract: Investigation into thiol-(meth)acrylate Michael addition reactions using amine and phosphine catalysts

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Publication details

The article was received on 26 Mar 2010, accepted on 03 May 2010 and first published on 07 Jun 2010


Article type: Paper
DOI: 10.1039/C0PY00100G
Citation: Polym. Chem., 2010,1, 1196-1204
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    Investigation into thiol-(meth)acrylate Michael addition reactions using amine and phosphine catalysts

    G. Li, R. K. Randev, A. H. Soeriyadi, G. Rees, C. Boyer, Z. Tong, T. P. Davis, C. R. Becer and D. M. Haddleton, Polym. Chem., 2010, 1, 1196
    DOI: 10.1039/C0PY00100G

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