Resum
The fluorous phosphines P[(CH2)mRfn]3 (Rfn = (CF2) n-1CF3; m/n = 2/8, 3/8, 3/10) are efficient nucleophilic catalysts of Michael addition reactions. They can be easily recycled based upon their highly temperature-dependent solubilities (thermomorphism), with recovery by simple liquid/solid phase separation. The phosphonium salt formed by reaction of the nucleophilic phosphine with the α,β-unsaturated system appears to be a significant component of the catalyst rest state. © 2010 Elsevier Ltd. All rights reserved.
Idioma original | Anglès |
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Pàgines (de-a) | 4662-4665 |
Revista | Tetrahedron Letters |
Volum | 51 |
Número | 35 |
DOIs | |
Estat de la publicació | Publicada - 1 de set. 2010 |