The cyclometalated complex 2 is easily obtained in high yield from the 14-electron complex [RuCl2{(2,6-Me2C6H3)PPh2}2] (1) by reaction with formaldehyde in the presence of triethylamine. The molecular structure of 2 has been determined by an X-ray investigation and reveals a five-coordinate complex with a δ-agostic interaction of one ortho-methyl group. By displacement of one phosphane from 2, a series of new cyclometalated complexes can be obtained. The derivative 4 bearing 2-(aminomethyl)pyridine is a highly active catalyst for hydrogen transfer reactions. Thus, a large number of ketones can be quantitatively converted to alcohols with very high TOF values (up to 63000 h-1).
Cyclometalated Ruthenium(II) Complexes as Highly Active Transfer Hydrogenation Catalysts
BARATTA, Walter;DEL ZOTTO, Alessandro;RIGO, Pierluigi
2004-01-01
Abstract
The cyclometalated complex 2 is easily obtained in high yield from the 14-electron complex [RuCl2{(2,6-Me2C6H3)PPh2}2] (1) by reaction with formaldehyde in the presence of triethylamine. The molecular structure of 2 has been determined by an X-ray investigation and reveals a five-coordinate complex with a δ-agostic interaction of one ortho-methyl group. By displacement of one phosphane from 2, a series of new cyclometalated complexes can be obtained. The derivative 4 bearing 2-(aminomethyl)pyridine is a highly active catalyst for hydrogen transfer reactions. Thus, a large number of ketones can be quantitatively converted to alcohols with very high TOF values (up to 63000 h-1).File | Dimensione | Formato | |
---|---|---|---|
Angew-article.pdf
non disponibili
Tipologia:
Altro materiale allegato
Licenza:
Non pubblico
Dimensione
143.21 kB
Formato
Adobe PDF
|
143.21 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.