Comparative study of reactions of 2-benzylisoquinolinium and 3,4-dihydro-2-benzylisoquinolinium salts with carbon disulfide in two base-solvent environments
Comparative study of reactions of 2-benzylisoquinolinium and 3,4-dihydro-2-benzylisoquinolinium salts with carbon disulfide in two base-solvent environments
omnipresent in biologically active molecules. Here we report on the direct asymmetric synthesis of these valuable compounds via the reaction of 3,4-dihydroisoquinolinium tetraarylborates. The dualroles of anionic tetraarylborates, which function as both prenucleophiles and stabilizers of 3,4-dihydroisoquinolinium cations, enable this rhodium(I)-catalyzed protocol to convergently provide enantioenriched 1-aryl