Synthesis of Concave and Vaulted 2H-Pyran-fused BINOLs and Corresponding [5] & [7]-Oxa-helicenoids: Regioselective Cascade Concerted Route and DFT studies

Synthesis of concave and vaulted 2H-Pyran fused BINOLs has been achieved. Regioselective, path-breaking concerted cascade route allows the placement of six-membered hetero-aromatic rings at the ste...