OICC Press Iranian Journal of Catalysis 2345-4865 1 1 2024 02 03 Melamine trisulfonic acid: A new, efficient and reusable catalyst for the protection of alcohols, phenols, aldehydes and amines EN Farhad Shirini Department of Chemistry, College of Science, University of Guilan, Rasht, Iran 0000-0002-7204-5000 Mohammad A. Zolfigol College of Chemistry, Bu-Ali Sina University, Hamedan,I.R. Iran Jalal Albadi Department of Chemistry, Faculty of Science, Shahrekord University, Shahrekord, Iran. Toktam F. Rastegar College of Chemistry, Bu-Ali Sina University, Hamedan,I.R. Iran Journal Article 2024 02 03 Tetrahydropyranylation of alcohols and phenols, acetylation of aldehydes and N-Boc protection of amines are efficiently catalyzed by melamine trisulfonic acid (MTSA). All reactions were performed at room temperature in good to high yields.