20,24-diamino-2,3,11,12-dibenzo-1,4,7,10,13,16-hexaoxacyclooctadeca-2,11-diene   、                                                                                      
cis-3-methyl-Δ4-tetrahydrophthalic anhydride                                                                                                                                                              在
                                                                                                                                                                                 PPA                                                                                                                                  作用下,
                                                                                                                                                                                        反应 2.0h,
                                                                                                                以78%的产率得到14,36-dimethyl-2,5,8,24,27,30-hexaoxa-20,42-diazaheptacyclo[29.13.0.09,23.011,21.013,18.033,43.035,40]tetratetraconta-1(31),9(23),10,15,21,32,37,43-octaene-12,19,34,41-tetrone