A Highly Convergent Synthesis of 2‐Phenyl Quinoline as Dual Antagonists for NK2 and NK3 Receptors

Abstract A novel and highly convergent synthesis leading to 2‐phenyl‐quinolines has been developed. As demonstrated in the preparation of 6‐fluoro‐3‐(3‐oxo‐piperazin‐1‐ylmethyl)‐2‐phenyl‐quinoline‐4‐carboxylic acid [(S)‐1‐cyclohexyl‐ethyl]‐amide (8), the method provides fascile access to this class of analogues via the common intermediate 7.