A Cooperative Hydrogen Bond Donor/Brønsted Acid System for the Enantioselective Synthesis of Tetrahydropyrans Methodology Maskeri, M. A.; O’Connor, M. J.; Jaworski, A. A.; Bay, A. V.; Scheidt, K. A.* Angew. Chem. Int. Ed. 2018, 57, 17225-17229.