(1S,3R)-3-(tert-butoxycarbonylamino)cyclohexanecarboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
哌啶   、                                                                                                  O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate   、                                                                                                  
N,N-二异丙基乙胺   、                                                                                                  N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 
(S)-2-[((1S,3R)-3-{(S)-2-[((1S,3R)-3-tert-Butoxycarbonylamino-cyclohexanecarbonyl)-methyl-amino]-propionylamino}-cyclohexanecarbonyl)-methyl-amino]-propionic acid 9H-fluoren-9-ylmethyl ester