P. Gros et al., SILICA-SUPPORTED GUANIDINIUM CHLORIDE ACETYL-CHLORIDE AS AN EFFICIENTDEPROTECTING REAGENT FOR ACETALS, Journal of chemical research. Synopses, (5), 1995, pp. 196-197
Acetals have been treated with acetyl chloride in the presence of cata
lytic amounts of silica-supported guanidinium chloride to produce the
corresponding aldehydes and ketones in good yields under neutral condi
tions.