tert-butyl 2-((4S,9S,14aS,E)-4-(((9H-fluoren-9-yl)methoxy)carbonylamino)-3,10-dioxo-3,4,5,8,9,10,12,13,14,14a-decahydro-1H-pyrrolo[2,1-c][1,4]oxaazacyclododecin-9-yl)acetate   、                                                                                      
三氟乙酸   、                                                                                      
2-((4S,9S,14aS,E)-4-(((9H-fluoren-9-yl)methoxy)carbonylamino)-3,10-dioxo-3,4,5,8,9,10,12,13,14,14a-decahydro-1H-pyrrolo[2,1-c][1,4]oxaazacyclododecin-9-yl)acetic acid   、                                                                                      
对氯苄胺                                                                                                                                                              在
                                                                                                                                                                                 ice water                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷   、                                                                                         
methanol-dichloromethane                                                                                  为溶剂,
                                                                                                                                                    反应 5.0h,
                                                                                                                以The product (44 mg) was obtained in 50% yield over 2 steps after column chromatography (MeOH/DCM gradient)的产率得到