Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
N-Arylation in the presence of FeCI3 (pyrrazole). 
| FeCI3 | 3C Yield (%) |
|---|---|
| >98% (Merck) | 87 (ref. 3a) |
| >98% (Aldrich) | 26 |
| >99.99 (Aldrich) | 9 |
| >99.99% + 5 ppm Cu2O | 78 |
| >99.99% + 10 ppm Cu2O | 79 |
| no Fe + ligand + 5 ppm Cu2O | 77 |
| no Fe + no ligand + 5 ppm Cu2O | 23 |
