Trifluoromethanesulfonic acid (also named as Triflic acid,TFMS,TFSA,HOTf,TfOH)is the strongest organic acid, which is mainly used as a catalyst for esterification and deglycosylation for glycoproteins. It is known as a versatile synthetic toolkit for the preparation of various compounds of interest in medicine and chemical industry, such as nucleoside, antibiotics, steroid, glycoside, synthetic vitamin and the modification of silicone rubber, etc..
Trifluoromethanesulfonic Acid, an Unusually Powerful Catalyst for the Michael Addition Reaction of β-Ketoesters under Solvent-Free Conditions. 
Trifluoromethanesulfonic Acid Catalyzed Novel Friedel–Crafts Acylation of Aromatics with Methyl Benzoate. 
Addition reaction of dialkyl disulfides to terminal alkynes catalyzed by a rhodium complex and trifluoromethanesulfonic acid. 
Versatile synthesis of 3, 4-dihydroisoquinolin-1 (2H)-one derivatives via intra-molecular Friedel-Crafts reaction with trifluoromethanesulfonic acid. 
One-pot preparation of 2, 5-disubstituted and 2, 4, 5-trisubstituted oxazoles from aromatic ketones with molecular iodine, oxone, and trifluoromethanesulfonic acid in nitriles. 
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