The present invention relates to a method comprising the step of contacting a protected N,N-bis(2-X-ethyl)amine with a (2-fluorophenyl)acetonitrile in the presence of a water- soluble phase transfer reagent, concentrated aqueous base, and an immiscible organic solvent, and under such conditions to form a 4-(2-fluorophenyl)-4-piperidinecarbonitrile in at least a 70% yield, wherein X is a leaving group. The 4-(2-fluorophenyl)-4- piperidinecarbonitrile is useful in preparing spiroindolines, which can be used as precursors of compounds that are modulators of CCR2 receptor.
本发明涉及一种方法,包括以下步骤:在
水溶性相转移试剂,浓缩
水溶性碱和不相容有机溶剂的存在下,将受保护的N,N-双(2-X-乙基)胺与(2-
氟苯基)
乙腈接触,以形成至少为70%的4-(2-
氟苯基)-4-
哌啶碳腈,其中X为离去基团。4-(2-
氟苯基)-4-
哌啶碳腈可用于制备螺内酰胺,其可用作CCR2受体调节剂的前体化合物。