A mixture of 3-(3-(cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acid (41.0 mg, 0.118 mmol), 1-methylcyclobutylamine (22.5 mg, 0.264 mmol), (7-azabenzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate (81.1 mg, 0.156 mmol), N,N-diisopropylethylamine (64 uL, 0.37 mmol), 4-dimethylaminopyridine (2.89 mg, 0.0237 mmol), and N,N-dimethylformamide (2.0 mL, 26 mmol) was stirred at 50° C. for 15 hours. The reaction mixture was poured into ethyl acetate and washed with water and brine, filtered through a plug of silica gel, and evaporated in vacuo. The crude product was purified via reverse phase HPLC and lyophilized to yield 23.3 mg (78%) of 3-(3-(cyclopropanecarboxamido)isoquinolin-7-yl)-4-methyl-N-(1-methylcyclobutyl)benzamide. LCMS (ESI): RT (min)=5.083, M+H=414.2, method=E; 1H NMR (400 MHz, DMSO) δ 10.90 (s, 1H), 9.19 (s, 1H), 8.51 (s, 1H), 8.35 (s, 1H), 8.04 (s, 1H), 7.94 (d, J=8.5 Hz, 1H), 7.82 (s, 1H), 7.80 (d, J=7.9 Hz, 1H), 7.73 (dd, J=8.5, 1.5 Hz, 1H), 7.41 (d, J=7.9 Hz, 1H), 2.40-2.29 (m, 5H), 2.13-2.04 (m, 1H), 2.03-1.92 (m, 2H), 1.86-1.75 (m, 2H), 1.47 (s, 3H), 0.91-0.80 (m, 4H).
