Crawforth, C.M., Fairlamb, I.J.S., Kapdi, A.R., Serrano, J.L., Taylor, R.J.K. and Sanchez, G. (2006) Air stable, phosphine-free anionic palladacyclopentadienyl catalysts: Remarkable halide and pseudohalide effects in Stille coupling. Advanced Synthesis & Catalysis, 348 (4-5). pp. 405-412. ISSN 1615-4150
Full text not available from this repository.Abstract
The Stille cross-coupling of allylic and benzyl bromides is shown to proceed efficiently using phosphine-free dinuclear anionic palladacyclopentadienyl catalysts possessing bridging (N,O)-imidate ligands. The type of bridging anion influences the catalytic activity considerably. Halide anions such as chloride, bromide or iodide also influence the catalytic activity but to a far lesser extent than the pseudohalide imidate anions (from succinimide or phthalimide). A Baldwin-type cooperative effect is seen with 7a using CuI as a co-catalyst, in the presence of two equivalents of CsF in DMF at 40 °C. In toluene, these additives slow down substrate turnover.
| Item Type: | Article |
|---|---|
| Keywords: | CC bond formation • copper(I) salts • cross-coupling • halide effects • palladium |
| Academic Units: | The University of York > Chemistry (York) |
| Depositing User: | York RAE Import |
| Date Deposited: | 14 Aug 2009 12:53 |
| Last Modified: | 14 Aug 2009 12:53 |
| Published Version: | http://dx.doi.org/10.1002/adsc.200505325 |
| Status: | Published |
| Publisher: | John Wiley & Sons |
| Identification Number: | 10.1002/adsc.200505325 |
| URI: | http://eprints.whiterose.ac.uk/id/eprint/5562 |
Actions (login required)
 |
View Item |
