Complementary asymmetric routes to fused tricyclic (R)-2,3,4,4a,5,6-hexahydro-1H-pyrazino[1,2-a]quinolines and (R)-1,2,3,4,5,5a,6,7-octahydro-[1,4]diazepino[1,2-a]quinolines
Keywords: GPCR ligand; Asymmetric synthesis; Dilithiation; Tetrahydroquinoline; Fsp3; CNS drugs;