benzyl 4-(3-[(2S)-2-piperidyl]-1,2,4-oxadiazol-5-ylmethoxy)-1-piperidinecarboxylate   、                                                                                      
1H-苯并[d]咪唑-2-磺酰氯                                                                                                                                                              在
                                                                                                                                                                                 
benzyl 4-(3-[(2S)-1-(1H-benzo[d]imidazol-2-ylsulfonyl)-2-piperidyl]-1,2,4-oxadiazol-5-ylmethoxy)-1-piperidinecarboxylate   、                                                                                                  crude product   、                                                                                                  silica gel   、                                                                                                  
正己烷   、                                                                                                  
乙酸乙酯                                                                                                                                  作用下,
                                                                                                                                                                                                                            以ethyl acetate, in 5% increments, to afford benzyl 4-(3-[(2S)-1-(1H-benzo[d]imidazol-2-ylsulfonyl)-2-piperidyl]-1,2,4-oxadiazol-5-ylmethoxy)-1-piperidinecarboxylate as a clear oil的产率得到benzyl 4-(3-[(2S)-1-(1H-benzo[d]imidazol-2-ylsulfonyl)-2-piperidyl]-1,2,4-oxadiazol-5-ylmethoxy)-1-piperidinecarboxylate