Fig. 10. (a) Catalysts designed to potentially alter diastereoselection in DAL organocascades, and TSSs depicting potential stabilization by n → π* interaction optimized with SMD(DCM)-M06-2X/6-31G(d), modelled with an explicit Brønsted base (2,6-lutidine). Selected bond distances are shown (Å). (b) Preparative synthesis of electronically tuned BTM-based catalysts.
