A convenient and efficient protocol for the synthesis of acylals catalyzed by Bronsted acidic ionic liquids under ultrasonic irradiation

作者：Borikar Sanjay P; Daniel Thomas^*

来源：Ultrasonics Sonochemistry, 2011, 18(5): 928-931.

DOI：10.1016/j.ultsonch.2011.03.022

• Ionic liquid
• 1-Butyl-3-methylpyridinium hydrogen sulfate
• 1,1-Diacetates
• Acylals
• Solvent-free
• Ultrasonic irradiation

The synthesis of acylals (1,1-diacetates) via the reactions of aldehydes with acetic anhydride was carried Out in 85-97% yields at room temperature under ultrasound irradiation catalyzed by the Bronsted acidic ionic liquid [bmpy]HSO(4). This method provides several advantages, such as solvent-free conditions, operational simplicity, higher yields, and reduced environmental consequences. The ionic liquid was recovered and reused.

• 出版日期2011-9