A new protocol for the methylation of aryl halides using the AlMe3 analogue DABAL-Me3 in a VOC/IL biphasic system is described. Very good isolated yields and chemoselectivities (methylation vs homocoupling), were observed in alkylmethylimidazolium and DABCO-based ILs, in presence of a bulky substituted phosphine (XPhos) and the structurally related sulfonated phosphine (XPhosSO3H). Recycling experiments of the IL-catalyst systems were satisfactory only in case of the butyldimethylimidazolium IL due to catalyst loss to the VOC phase. © 2010 Elsevier B.V. All rights reserved.
Palladium-catalysed methylation of aryl halides in ionic liquids with stabilized AlMe3
Fiorani, Giulia;
2010-01-01
Abstract
A new protocol for the methylation of aryl halides using the AlMe3 analogue DABAL-Me3 in a VOC/IL biphasic system is described. Very good isolated yields and chemoselectivities (methylation vs homocoupling), were observed in alkylmethylimidazolium and DABCO-based ILs, in presence of a bulky substituted phosphine (XPhos) and the structurally related sulfonated phosphine (XPhosSO3H). Recycling experiments of the IL-catalyst systems were satisfactory only in case of the butyldimethylimidazolium IL due to catalyst loss to the VOC phase. © 2010 Elsevier B.V. All rights reserved.
File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
Appl. Catal. A Gen. 2010, 381, 161-168.pdf
non disponibili
Descrizione: Apple. Catal. A: Gen. 2010, 381, 161-168
Tipologia:
Versione dell'editore
Licenza:
Accesso chiuso-personale
Dimensione
547.32 kB
Formato
Adobe PDF
|
547.32 kB | Adobe PDF | Visualizza/Apri |
I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
