Pentafluoropropionic Acid: An Efficient and Metal-Free Catalyst for the One-Pot Synthesis of Tetrahydrobenzo[<i>b</i>]pyran Derivatives

<table>Synthesis of tetrahydrobenzo[<i>b</i>]pyrans catalyzed by pentafluoropropionic acid.</table>

Journal of Chemistry

Scheme 1: Pentafluoropropionic Acid: An Efficient and Metal-Free Catalyst for the One-Pot Synthesis of Tetrahydrobenzo[<i>b</i>]pyran Derivatives 