An inexpensive and industrially advantageous method for producing optically active syn-3-(N-substituted-aminomethyl)-4-fluoropyrrolidine which may be an intermediate for producing pharmaceuticals is provided. The present invention relates a method for producing a syn-1-protected-4-fluoro-3-(N-substituted-N-nitrobenzenesulfonyl)pyrrolidine derivative or it's enantiomer, or their salts comprising the process of fluorinating a compound represented by the general formula (6) (in the formula, PG1 represents a protecting group for an amino group, R1 represents a C1 to C6 alkyl group which may be substituted or a C3 to C8 cycloalkyl group which may be substituted, and Ns represents a 2-nitrobenzenesulfonyl group or a 4-nitrobenzenesulfonyl group) or it's enantiomer using a nucleophilic fluorinating agent and an organic base having an amidine or guanidine structure.
本发明提供了一种生产具有光学活性的合成-3-(N-取代-
氨甲基)-4-
氟吡咯烷的廉价且具有工业优势的方法,该方法可作为生产药物的中间体。本发明涉及一种生产受 syn-1 保护的-4-
氟-3-(N-取代-N-
硝基苯磺酰基)
吡咯烷衍
生物或其对映体或它们的盐的方法,包括将通式 (6) 所代表的化合物
氟化的过程(式中,
PG1 代表
氨基的保护基团、R1 代表可能被取代的 C1 至 C6 烷基或可能被取代的 C3 至 C8 环烷基,Ns 代表 2-
硝基苯磺酰基或 4-
硝基苯磺酰基)或其对映体,使用亲核
氟化剂和具有脒基或
胍基结构的有机碱。