Catalytic activity of PEG-quat phase-transfer catalysts in dehydrohalogenation reactions

✍ Scribed by Sarina Grinberg; Eleonora Shaubi

• Book ID: 104204363
• Publisher: Elsevier Science
• Year: 1991
• Tongue: French
• Weight: 478 KB
• Volume: 47
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(01)87094-0

✦ Synopsis

New polyethylene glycol ammonium and phosphonium salts (PEG-quat) phasetransfer catalysts were synthesized and their catalytic activity was studied in a dehydrohalogenation liquid-liquid phase-transfer system. The catalytic activity of the PEG-quat catalyst depended on the nature of the quaternary salt, the most effective compounds being those in which only one hydroxyl group is replaced by the quatemary function.

Recently, much interest has been shown in the use of polyethylene glycols and their derivatives as inexpensive phase-transfer catalysts ln a variety of organic reactions.'-* The suitability of these compounds lies in their low cost; availability on an industrial scale; lack of toxicity, antigenicity and immunogenicity; high degree of stability in work reaction systems;