Potassium Phosphate, Tribasic → HCID 86687638, compound

Participants

Reaction Conditions

Reaction Steps

A vial was charged with 1-(4-chloro-5-fluoro-2-methoxyphenyl)-N-(1,3,4-thiadiazol-2-yl)isoquinoline-6-sulfonamide (INTERMEDIATE HHHHH; 88.75 mg, 0.197 mmol). (3,5-difluorophenyl)boronic acid (62.2 mg, 0.394 mmol), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine (2.020 mg, 4.92 μmol), chloro(2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl)[2-(2-aminoethylphenyl)]palladium(ii) dichloromethane (7.46 mg, 9.84 μmol), and potassium phosphate (125 mg, 0.590 mmol). The vial was flushed with Ar (g), then 1,4-dioxane (895 μl) and water (89 μl) were added. The vial was sealed and heated in a Biotage Initiator microwave reactor for 1 h at 120° C. The mixture was extracted with EtOAc (4×). The combined organic extracts were concentrated. The residue was purified by chromatography on silica gel (12-g Redi-Sep Gold column, 0-4% MeOH/DCM, then with 4-10% MeOH/DCM) to give N-(1,3,4-thiadiazol-2-yl)-1-(2,3′,5′-trifluoro-5-methoxy-[1,1′-biphenyl]-4-yl)isoquinoline-6-sulfonamide (31.54 mg, 0.060 mmol, 30.3% yield) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ=14.50 (br. s., 1H), 8.78 (s, 1H), 8.71 (d, J=5.7 Hz, 1H), 8.57 (d, J=1.6 Hz, 1H), 8.14 (d, J=5.5 Hz, 1H), 7.90 (dd, J=1.8, 8.9 Hz, 1H), 7.80 (d, J=8.8 Hz, 1H), 7.49 (d, J=7.6 Hz, 2H), 7.43-7.34 (m, 3H), 3.73 (s, 3H). m/z (ESI) 528.9 (M+H)+.

Provenance & Evidence