Citric Acid → 3-(3-(Cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of N-(7-bromoisoquinolin-3-yl)cyclopropanecarboxamide (0.3305 g, 1.135 mmol), 4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic acid (0.3782 g, 1.443 mmol), potassium carbonate (0.3196 g, 2.312 mmol), and bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (81.9 mg, 0.116 mmol) in 1,4-dioxane (5.0 mL, 64 mmol) and water (0.5 mL, 30 mmol) was heated at 90° C. for 2 hours. The reaction mixture was cooled to room temperature, acidified with 10% aqueous citric acid, and extracted twice with ethyl acetate. The combined organic extracts were reduced in volume under evaporation and the product collected via filtration as a white precipitate and dried under vacuum to yield 365.5 mg (91%) of 3-(3-(cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acid. LCMS (ESI): M+H=347.2; 1H NMR (400 MHz, DMSO-d6) δ 10.90 (s, 1H), 9.19 (s, 1H), 8.50 (s, 1H), 8.04 (s, 1H), 7.93 (d, J=8.6 Hz, 1H), 7.89-7.83 (m, 2H), 7.72 (d, J=8.5 Hz, 1H), 7.45 (d, J=7.7 Hz, 1H), 2.34 (s, 3H), 2.14-2.02 (m, 1H), 0.85 (m, 4H).

Provenance & Evidence