[N+:1]([C:4]1[N:9]=[CH:8][C:7]([N:10]2[CH2:15][C@@H:14]3[CH2:16][C@H:11]2[CH2:12][N:13]3C(OC(C)(C)C)=O)=[CH:6][CH:5]=1)([O-:3])=[O:2].FC(F)(F)C(O)=O.C(Cl)Cl>>[N+:1]([C:4]1[N:9]=[CH:8][C:7]([N:10]2[CH2:15][C@@H:14]3[CH2:16][C@H:11]2[CH2:12][NH:13]3)=[CH:6][CH:5]=1)([O-:3])=[O:2]The product from Example 3A was treated with trifluoroacetic acid:methylene chloride (1:2) at ambient temperature for 2 hours. The volatiles were removed under reduced pressure, and the residue was purified on SiO2 (5% MeOH/CH2Cl2/1%NH4OH) to provide the title compound as a yellow gum. MS (DCI/NH3) m/z 221 (M+H)+, 238 (M+NH4)+.
불러오는 중…