(1S,2S)-2-amino-N-cyclohexylcyclopentane-1-carboxamide hydrochloride    、                                                                                      
2',1':1,2:1",2":3,4-dibenzcyclohepta-1,3-diene-6-tert-butyloxycarbonylamino-6-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
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
                                                                                         
四氢呋喃   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 18.0h,
                                                                                                                以75%的产率得到tert-butyl (6-(((1S,2S)-2-(cyclohexylcarbamoyl)cyclopentyl)carbamoyl)-6,7-dihydro-5H-dibenzo[a,c][7]annulen-6-yl)carbamate