1-bromo-2-propan-2-ylsulfonylbenzene

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using analogous conditions to those described in Example 1 utilizing 5-(2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)pyrazin-2-amine and 1-bromo-2-(isopropylsulfonyl)benzene. MS (ESI): mass calcd. for C19H18FN3O2S, 371.11; m/z found, 372.1 [M+H]+. 1H NMR (400 MHz, CD3OD) δ 8.42 (s, 1H), 8.15 (dd, J=8.0, 1.1, 1H), 8.09 (d, J=1.4, 1H), 7.93 (m, 1H), 7.78 (m, 1H), 7.68 (m, 1H), 7.51-7.44 (m, 1H), 7.37-7.28 (m, 2H), 2.90-2.77 (m, 1H), 1.09 (d, J=6.8, 6H).

Conditions: temp:95.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 21B (0.53 g, 2.0 mmol), 3A (0.51 g, 2.4 mmol) and sodium carbonate (4.0 mL, 2M, 8.0 mmol) in 1,2-dimethoxyethane (25 mL, flushed and degassed (3×) with nitrogen) was added Pd(PPh3)4 (0.23 g, 0.2 mmol) under nitrogen. The reaction was heated to 95° C. for 3 h. The catalyst was filtered over celite and washed with ethyl acetate. The organic layer was washed with water, brine and then dried over sodium sulfate. The solvent was removed and the crude residue was purified by flash column chromatography to give 0.58 g of product 21C (69% yield). The catalyst was filtered over celite washed with ethyl acetate The organic layer was washed with water, brine dried over sodium sulfate The solvent was removed the crude residue was purified by flash column chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 21A (0.7 g, 3.0 mmol) in methanol (5 mL) was added oxone®8 (5.6 g, 9.0 mmol) in water (5 mL). The reaction was stirred at rt for 4 h. The reaction was quenched with 5% NaHSO3 and then neutralized with 1 M NaOH. The organic solvent was evaporated and the aqueous layer was extracted with dichloromethane (3×). The combined extracts were washed with brine and dried over sodium sulfate. The solvent was removed to give 0.53 g of product 21B (67% yield). 1H NMR (400 MHz, Methanol-d4) δ ppm 1.26 (d, J=6.85 Hz, 6H) 3.80-4.00 (m, 1H) 7.45-7.68 (m, 2H) 7.87 (dd, J=7.46, 1.59 Hz, 1H) 8.10 (dd, J=7.34, 2.20 Hz, 1H). The reaction was quenched with 5% NaHSO3 The organic solvent was evaporated the aqueous layer was extracted with dichloromethane (3×) The combined extracts were washed with brine dried over sodium sulfate The solvent was removed