Abstract
Abstract A convenient “one-pot” Friedel–Crafts reaction of mono -, bi - and tert -thiophenes with trifluoroacetic acid anhydride (TFAA) as an acylating agent and magnesium perchlorate dihydrate (anhydron) as catalyst affords trifluoroacetyl-substituted products in high yields. This method provides a novel approach for the synthesis of thiophene based derivatives bearing trifluoroacetyl group. The mechanism of this reaction is suggested.
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