We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Synthesis of Stable Diarylpalladium(II) Complexes: Detailed Study of the Aryl-Aryl Bond-Forming Reductive Elimination.
- Authors
GENsch, Tobias; Richter, Nils; Theumer, Gabriele; Kataeva, Olga; Knölker, Hans ‐ Joachim
- Abstract
The synthesis of diarylpalladium(II) complexes by twofold aryl C−H bond activation was developed. These intermediates of oxidative cyclization reactions are stabilized by chelation with acetyl groups while still maintaining sufficient reactivity to study their reductive elimination. Four distinct triggers were found for the reductive elimination of these complexes to dibenzofurans and carbazoles. Thermal elimination occurs at very high temperatures, whereas ligand-promoted and oxidatively induced reductive eliminations proceed readily at room temperature. Under these conditions, no isomerization occurs. In contrast, weak Brønsted acids, such as acetic acid, lead to a sequence of proto-demetalation, isomerization to a κ3-diarylpalladium(II) complex, and reductive elimination to non-symmetrical cyclization products.
- Subjects
ARYL group; CHELATION; COORDINATE covalent bond; DIBENZOFURANS; CHEMICAL synthesis; CARBAZOLE
- Publication
Chemistry - A European Journal, 2016, Vol 22, Issue 32, p11186
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201602849