Direct synthesis of 2-/3-(trifluoromethyl)thiochroman-4-ones: Superacid-induced tandem alkylation-cyclic acylation of benzenethiols using 2-/3-(trifluoromethyl)acrylic acid

Direct one-pot synthesis of 2-/3-(trifluoromethyl)thiochroman-4-ones is achieved by a superacid induced tandem S-alkylation-cyclic acylation.