methyl 5-(3-fluoro-4-vinylphenyl)nicotinate   、                                                                                      
溶剂黄146                                                                                                                                                              在
                                                                                                                                         palladium 10% on activated carbon                                                                                                                                                                          作用下,
                                                                                                                                                                                                85.0 ℃
                                                                                                                            、6.0 MPa
                                                                                条件下,
                                                                                                                                                    生成                                                 trans methyl 5-(4-ethyl-3-fluorophenyl)-1-formylpiperidine-3-carboxylate   、                                                                                             cis methyl 5-(4-ethyl-3-fluorophenyl)-1-formylpiperidine-3-carboxylate