Abstract
Phospha- and nitrogen-palladacycles are very powerful Pd catalyst systems for the Heck reaction. NHC-substituted nitrogen-palladacycles combines the advantageous stability of nitrogen-palladacycles with the steric demand and high R-donor strength of N-heterocyclic carbenes. The new catalysts are prepared by the addition of free carbenes to phospha- and nitrogen-palladacycles. A selection of the new NHC-palladacycles is tested in Heck coupling reaction of aryl chlorides and bromides with styrene. Turnover numbers > 530,000 and yields up to 99% have been obtained. This is an abstract of a paper presented at the 229th ACS National Meeting (San Diego, CA 3/13-17/2005).
| Original language | English |
|---|---|
| Pages (from-to) | INOR-226 |
| Journal | ACS National Meeting Book of Abstracts |
| Volume | 229 |
| Issue number | 1 |
| State | Published - 2005 |
| Event | 229th ACS National Meeting - San Diego, CA., United States Duration: 13 Mar 2005 → 17 Mar 2005 |