在
                                                                                                                                                                                 
N-甲基吗啉   、                                                                                                  
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷   、                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以7%的产率得到tert-butyl N-[4-[(12S,27S)-27-[4-[(2-methylpropan-2-yl)oxycarbonylamino]butyl]-10,25-dioxo-3,7,14,18,22,29-hexaoxa-11,26,31,32,33,34,35,36-octazaheptacyclo[26.2.1.12,5.16,9.113,16.117,20.121,24]hexatriaconta-1(30),2(36),4,6(35),8,13(34),15,17(33),19,21(32),23,28(31)-dodecaen-12-yl]butyl]carbamate