NCCNC(=O)OCC1C=CC=CC=1.[N:15]([C:18](=[CH:23][C:24]1[CH:32]=[CH:31][CH:30]=[C:29]2[C:25]=1[CH:26]=[CH:27][NH:28]2)[C:19]([O:21][CH3:22])=[O:20])=[N+]=[N-].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C>[CH:23]1[C:24]2=[C:25]3[C:29]([CH:30]=[CH:31][C:32]2=[N:15][C:18]=1[C:19]([O:21][CH3:22])=[O:20])=[N:28][CH:27]=[CH:26]3To compound 1 (18.2 mg, 0.03 mmol) in DMF (2 mL) was added 2 (16 mg, 0.036 mmol) and HATU (14 mg, 0.036 mmol) followed by adding DIPEA (19 uL) and the reaction mixture was stirred for 7 hrs at 25° C. The solvent was removed under vacuo and the product was purified by Prep HPLC (SymmetrPrep C18, 7 μm, 19×150 mm column), eluted at 10 ml/min (0.01% TFA in water/acetonitrile) with a gradient: 10% acetonitrile in 5 min, 10% to 50% acetonitrile in 15 min, maintaining 50% acetonitrile in 5 min, 50% to 100% acetonitrile in 5 min, to give 3 (15.8 mg, 53%). MS: calcd for C59H58ClN7O9 (M+H) m/z 1044.4 found 1045.
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