Brønsted Acidic Ionic Liquids as Efficient and Recyclable Catalysts for Protection of Carbonyls to Acetals and Ketals Under Mild Conditions

Yuying Dua & Fuli Tiana* a Department of Chemistry, College of Chemistry and Chemical Engineering , Inner Mongolia University , Hohhot, China * Department of Chemistry, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China Phone: +86‐471‐4993443 E-mail: ceac@imu.edu.cn Abstract A series of acidic ionic liquids have been used as efficient catalysts for the protection of various carbonyl compounds at room temperature. The features of mild conditions, satisfactory isolated yield, simple workup, and the recyclability of the catalyst were present in this process.