Fe3O4@SiO2-imid-PMAn efficiently catalyzed
the conversion of aromatic, heteroaromatic, and aliphatic
aldehydes to 1,1-diacetates under solvent-free conditions at
room temperature. Deprotection of the resulting 1,1-diacetates
can also be achieved using the same catalyst in
methanol. The acylation of aldehydes was highly
chemoselective, and no ketone was acylated, which provided
a method for the synthesis of acylals from aldehydes
in the presence of ketones. Therefore, this method gives
notable advantages such as excellent chemoselectivity,
mild reaction condition, short reaction times and excellent
yield. Also, nanocatalyst can be easily recovered by a
magnetic field and is reusable without efficient loss of its
catalytic activity.
کلید واژگان :
Nanocatalyst 1,1-Diacetates Aldehydes Chemoselective Deprotection Magnetic separation
