- Turkish Journal of Chemistry
- Vol: 36 Issue: 1
- Solvent-free Michael addition of 2-cyclohexenone under ultrasonic irradiation in the presence of lon...
Solvent-free Michael addition of 2-cyclohexenone under ultrasonic irradiation in the presence of long chain dicationic ammonium salts
Authors : Aytek Öge, Murat Emrah Maviş, Çiğdem Yolaçan, Feray Aydoğan
Pages : 137-146
View : 7 | Download : 4
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :Long chain dicationic ammonium salts (1a-1c), easily prepared from tert-amines and dihaloalkanes, were successfully used as efficient phase-transfer catalysts in the Michael addition reaction of various active methylene compounds to 2-cyclohexenone without solvent under ultrasonic irradiation. The investigated dicationic salts were more effective than monocationic tetrabutylammonium bromide, with short reaction times and high yields. This methodology was established under phase-transfer catalytic conditions and ultrasonic effects with many advantages, including the easy and cost-effective synthesis of the catalyst, mild reaction conditions, short reaction times, good yields, simple work-up procedures, and environmental friendliness.Keywords : Michael addition, phase-transfer catalyst, ultrasound-assisted synthesis, solvent-free reaction, 2-cyclohexenone