Chiral 3,4-H2-Dihydro-Monothiobinaphthol-Derived Bifunctional Catalysts: Design, Synthesis, and Application to Enantioselective Disulfuration of Aza[5]Helicenes
We herein report the design and synthesis of a class of 3,4-dihydro-monothiobinaphthol (3,4-H2-MTB)-derived bifunctional catalysts and their application in the asymmetric electrophilic C–H disulfuration of aza[5]helicenes. These catalysts feature a cooperative dual-activation motif: the thioether moiety acts as a Lew...