Regioselective synthesis of substituted 3,6-dihydropyran from 3-butene-1-ol and aromatic aldehydes via Prins cyclization mediated by TfOH (triflic acid). - Deshmukh, Shubham; Sarkar, Sujit; Rathod, Vishwajeet; Patel, Chandan; Agawane, Ganesh; Suresh, Selvaraj; Bhuse, Darpan (Discover Chemistry, 2026)