Saeed Zahmatkesh - Department of Science, Payame Noor University Tehran, Iran
Sara Shivanezhad - Department of Science, Payame Noor University Tehran, Iran
Mahin Ranjbar - Department of Science, Payame Noor University Tehran, Iran

A new nano solid acid has been prepared from biological source and then an efficientmethod for deprotection of acylals (1,1-diacetates) to their corresponding aldehydes in thepresence of synthetic nano-silica sulfuric acid and MeOH is reported. All the products have beenidentified the the TLC, mp and the spectroscopic analysis

nano-silica sulfuric acid, 1,1-diacetate, solvent-free, diatoms, aldehydes