Reaction Steps
To a degassed solution of 2-(bicyclo[3.1.0]hexan-1-yl)-N-methyl-6-(N-methylmethylsulfonamido)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuran-3-carboxamide (100 mg, 0.20 mmol), 2-chloro-11-fluoro-6H-pyrido[2′,3′:5,6][1,3]oxazino[3,4-a]indole (67 mg, 0.24 mmol), K3PO4 (109 mg, 0.41 mmol) in 1,4-Dioxane (5 mL) and H2O (0.5 ml) was added Pd(dba)3 (5 mg), X-Phos (5 mg) under N2, then the mixture was stirred at 110° C. for 2 hours. The reaction mixture was cooled to RT and filtered. The filtrate was washed with H2O, brine, extracted with DCM, and dried over Na2SO4. After concentration, the residue was purified by prep-HPLC to give the product of 2-(bicyclo[3.1.0]hexan-1-yl)-5-(11-fluoro-6H-pyrido[2′,3′:5,6][1,3]oxazino[3,4-a]indol-2-yl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (20 mg, yield: 16%). 1H-NMR (CDCl3, 400 MHz) δ 8.12 (s, 1H), 7.55 (s, 1H), 7.46 (s, 2H), 7.21 (s, 2H), 7.12 (d, J=8.0 Hz, 1H), 6.86 (q, J=8.0 Hz, 1H), 6.17 (d, J=4.0 Hz, 1H), 5.60 (s, 2H), 3.38 (s, 3H), 3.05 (d, J=4.8 Hz, 3H), 2.67 (s, 3H), 2.14˜2.22 (m, 2H), 2.11˜2.16 (m, 2H), 2.01˜2.09 (m, 2H), 1.91˜1.98 (m, 1H), 1.84 (d, J=4.0 Hz, 2H). MS (M+H)+: 601.
