Carbolines and tetrahydrocarbolines are common structural motifs in pharmaceuticals and natural products.[1] b-Carboline and its saturated analog, tryptoline, are particularly prevalent [2, 3] and continue to inspire methods to efficiently access them.[4, 5] In contrast, methods to access the d-[6] or a-isomer [7] are uncommon despite the important biological properties exhibited by these carbolines. In addition to antibacterial and antiplasmodial ...