Chemoselective Protection and Deprotection of Aldehydes Using Solid Supported Reagent (Silica Chloride) under Solvent-Free Conditions. -Silica chloride is found to be a highly efficient catalyst for both protection and deprotection of aldehydes. Aldehydes react chemoselectively in the presence of ketones. -(DATTA, B.; PASHA*, M. A.; Synth. Commun. 41 (2011) 8, 1160-1166, http://dx.