[NH2:1][C:2]1[N:7]=[CH:6][C:5]([NH:8][C:9]([C:11]2[CH:12]=[C:13]([CH:17]=[CH:18][C:19]=2[CH3:20])[C:14]([OH:16])=O)=[O:10])=[CH:4][CH:3]=1.C(Cl)Cl.Cl.CN(C)CCCN=C=NCC.[NH2:36][CH2:37][CH:38]1[CH2:40][CH2:39]1>CN(C=O)C>[NH2:1][C:2]1[N:7]=[CH:6][C:5]([NH:8][C:9](=[O:10])[C:11]2[CH:12]=[C:13]([CH:17]=[CH:18][C:19]=2[CH3:20])[C:14]([NH:36][CH2:37][CH:38]2[CH2:40][CH2:39]2)=[O:16])=[CH:4][CH:3]=1
In a round-bottomed flask was charged 3-((6-aminopyridin-3-yl)carbamoyl)-4-methylbenzoic acid (70 mg, 0.26 mmol), DCM (1 ml), and DMF (1 ml). 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (74 mg, 0.39 mmol) was then added. The reaction mixture was stirred for 10 min before (aminomethyl)cyclopropane (27 μl, 0.31 mmol) was introduced. The reaction mixture was stirred at RT under N2 for 16 h. The reaction was partitioned between DCM (15 ml) and brine (10 mL). The aqueous layer was back exacted with DCM (3×10 mL) and the combined DCM layer was dried (Na2SO4) and concentrated. The crude product was dissolved in DCM and purified by chromatography through a Redi-Sep® pre-packed silica gel column (40 g), eluting with a gradient of 0% to 10% MeOH in CH2Cl2, to provide N3-(6-aminopyridin-3-yl)-N1-(cyclopropylmethyl)-4-methylisophthalamide as an off-white solid. m/z: 325.2 (M+1).
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