Hydrochloric Acid → HCID 86687692, compound

Participants

Reaction Steps

A solution of PdCl2(dppf)-CH2Cl2 adduct (7.78 mg, 9.53 μmol), 2-(4-(difluoromethyl)-2,5-dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (Intermediate NNNNN; 0.078 g, 0.248 mmol), 1-chloro-N-(4-methoxybenzyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide (Intermediate JJJ; 0.085 g, 0.191 mmol), and potassium carbonate (0.079 g, 0.572 mmol) in 2 mL dioxane, 1 mL water was heated to 100° C. overnight. LC/MS showed mostly product, so the reaction mixture was allowed to cool to room temperature. The aqueous layer was then removed. The reaction mixture was treated with HCl (4N in dioxane) (0.953 ml, 3.81 mmol) and was heated to 100° C. for one hour. LC/MS showed mostly product, so the reaction mixture was concentrated. Purification of the crude residue by reverse phase column chromatography [Puriflash C18 30μ, 10-100% (0.1% NH4OH in MeOH)/(0.1% NH4OH in water)] gave 1-(4-(difluoromethyl)-2,5-dimethoxyphenyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide (0.016 g, 0.034 mmol, 17.58% yield). 1H NMR (MeCN-d3) δ: 8.68 (d, J=5.7 Hz, 1H), 8.51 (s, 1H), 7.93 (d, J=6.0 Hz, 1H), 7.87 (d, J=8.9 Hz, 1H), 7.73 (d, J=8.8 Hz, 1H), 7.32 (s, 1H), 7.10 (d, J=6.1 Hz, 1H), 6.99 (d, J=4.7 Hz, 1H), 6.61 (d, J=4.7 Hz, 1H), 3.81 (s, 3H), 3.65 (s, 3H); (M+H)+=478.0.

Provenance & Evidence