PdCl2(bipy) complex—An efficient catalyst for Heck reaction in glycol–organic biphasic medium

✍ Scribed by Sangeeta V. Jagtap; Raj M. Deshpande

• Book ID: 104009751
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 491 KB
• Volume: 131
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2007.10.043

✦ Synopsis

The Palladium complex PdCl 2 (bipy) (1) was found to be efficient in catalyzing the Heck reaction of aryl halides in a biphasic system comprising ethylene glycol along with an organic solvent. A proper tailoring of the organic phase ensured that the leaching of the catalyst to the organic phase was negligible. The catalyst was active for the Heck reaction of a number of olefins, aryl halides, in presence of organic and inorganic bases. The PdCl 2 (bipy) catalyst was stable and could be recycled for five times without any loss in activity and selectivity. A major advantage of this work is that unlike hitherto reported biphasic systems; it does not employ a water-soluble ligand to achieve biphasic catalysis.