反应详情

For 3 min, N2 was bubbled through a mixture of 4-bromo-2-methylisoquinolin-1(2H)-one (54 mg, 0.23 mmol), (1-methylpyrazol-4-yl)boronic acid (31 mg, 0.25 mmol), aqueous 2M Na2CO3 (0.375 mL) and Pd(dppf)Cl2 (8 mg, 0.01 mmol) in 1,4-dioxane (1.5 mL) which was then microwaved at 120° C. for 1 h. Work up in a manner similar to Example 18, step 3, and two successive silica gel chromatographies, eluting with 15-80% EA in hexane over 6 min and continuing 80% isocratic EA followed by a second chromatography 15-100% EA in hexane over 6 min and continuing 100% isocratic EA gave the title compound (28 mg, 0.12 mmol) as a cream solid in 51% yield. 1H NMR (400 MHz, DMSO-d6) δ ppm 3.54 (s, 3H) 3.92 (s, 3H) 7.50 (s, 1H) 7.55 (ddd, J=8.02, 5.87, 2.27 Hz, 1H) 7.60-7.64 (m, 1H) 7.70-7.80 (m, 2H) 7.95 (s, 1H) 8.31 (d, J=7.83 Hz, 1H). LCMS (M+H)+ 240.

1. customwas then microwaved at 120° C. for 1 h
2. washeluting with 15-80% EA in hexane over 6 min
3. waitfollowed by a second chromatography 15-100% EA in hexane over 6 min