[CH3:1][N:2]1[CH:6]=[CH:5][CH:4]=[C:3]1[C:7]([OH:9])=O.[CH3:10]N(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C.Cl.N1[C:53]2[CH2:52][CH2:51][NH:50][CH2:49][C:48]=2[CH:47]=[CH:46][C:45]=1[C:54]([O:56][CH3:57])=[O:55]>CN(C=O)C>[CH3:1][N:2]1[CH:6]=[CH:5][CH:4]=[C:3]1[C:7]([N:50]1[CH2:51][CH2:52][C:53]2[C:48](=[CH:47][CH:46]=[C:45]([C:54]([O:56][CH3:57])=[O:55])[CH:10]=2)[CH2:49]1)=[O:9]
To a vial containing N-methylpyrrole-2-carboxylic acid (0.0206 g, 0.165 mmol) was added HATU (0.0627 g, 0.165 mmol) in DMF (1.00 mL) followed by DIPEA (0.157 mL, 0.9 mmol) in DMF (0.5 mL). The mixture was shaken at it for 30 min before methyl 5,6,7,8-tetrahydro-1,6-naphthyridine-2-carboxylate hydrochloride (0.0343 g, 0.15 mmol) in DMF (1.00 mL) was added. The solution was then shaken at rt for 13 h. The solvent was evaporated and to the residue was added DCE (3 mL), water (1 mL), and a few drops of ammonia in MeOH (7 N). After being thoroughly mixed, the layers were separated and the aqueous layer was extracted with DCE (3 mL). The combined organic phases were then concentrated to give a solid residue.
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