Correction to: Catalysis Letters https://doi.org/10.1007/s10562-020-03220-0

An error appeared in our paper entitled “para-Toluenesulfonic Acid Catalyzed Synthesis of Indenes a Tandem Friedel–Crafts Alkylation/Hydroarylation of Tertiary Propargylic Alcohols with Electron-Rich Arenes” published in Catalysis Letters. The word “via” was unfortunately missed to include in the article title. The correct title is as follows, “para-Toluenesulfonic Acid Catalyzed Synthesis of Indenes via a Tandem Friedel–Crafts Alkylation/Hydroarylation of Tertiary Propargylic Alcohols with Electron-Rich Arenes”.

The original article has been corrected.