Reaction Steps
A solution of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-pyrrolo[2,3-b]pyridine (21.15 g, 53.11 mmol) in DME (212 ml) was added to a solution of (3R)-4-(2-chloro-6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)pyrimidin-4-yl)-3-methylmorpholine (12.55 g, 37.93 mmol) in DME:water 4:1 (55 ml). 2M aqueous sodium carbonate solution (22.76 ml, 45.52 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.666 g, 0.95 mmol) were added. The resulting solution was stirred at 90° C. for 2 hours under nitrogen. The reaction mixture was diluted with EtOAc (400 ml), and washed with water (400 ml). The organic layer was dried over MgSO4, filtered and evaporated. The residue was dissolved in DCM (100 ml) and a portion was purified by flash chromatography on silica eluting with a gradient of 0 to 5% MeOH in DCM. Pure fractions were evaporated to afford (3R)-3-methyl-4-(6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)-2-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-yl)pyrimidin-4-yl)morpholine (8.42 g, 39%); 1H NMR (400 MHz, CDCl3) 1.36 (3H, d), 1.52 (2H, dd), 1.80 (2H, dd), 2.24-2.46 (3H, s), 3.10 (3H, s), 3.36 (1H, td), 3.60 (1H, td), 3.74 (1H, dd), 3.84 (1H, d), 3.99-4.18 (2H, m), 4.47 (1H, s), 6.91 (1H, s), 7.23-7.3 (3H, m, obscured by CDCl3), 7.45 (1H, d), 7.81 (1H, d), 8.08 (3H, dd), 8.51 (1H, d); m/z: (ES+) MH+, 567.4. The rest of the material was evaporated and the residue was dissolved in DCM (500 ml) and concentrated in vacuo onto silica (100 g). The resulting powder was purified by flash chromatography on silica, eluting with a gradient of 0 to 5% MeOH in DCM. Pure fractions were evaporated to dryness to afford (3R)-3-methyl-4-(6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)-2-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-yl)pyrimidin-4-yl)morpholine (4.00 g, 19%); 1H NMR (400 MHz, DMSO-d6) 1.19-1.31 (3H, m), 1.37-1.58 (3H, m), 1.75 (1H, ddd), 2.34 (3H, s), 3.04 (3H, d), 3.2-3.27 (1H, m), 3.46-3.54 (1H, m), 3.65 (1H, dd), 3.78 (1H, d), 3.82 (1H, s), 3.99 (1H, dd), 4.16 (1H, d), 4.54 (1H, s), 7.04 (1H, s), 7.42 (2H, d), 7.54 (1H, d), 8.01 (3H, dd), 8.10 (1H, d), 8.49 (1H, d); m/z: (ES+) MH+, 567.00. Example 2.02 can also be prepared as follows: 2M NaOH solution (0.2 ml, 0.40 mmol) was added to (3R)-3-methyl-4-(6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)-2-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-yl)pyrimidin-4-yl)morpholine (0.107 g, 0.19 mmol) in DME:water 4:1 (4 ml). The resulting solution was stirred at 50° C. for 18 hours and then further 2M NaOH solution (0.2 ml, 0.40 mmol) was added and the solution was stirred at 50° C. for 3 hours. The reaction mixture was evaporated to dryness and the residue dissolved in DCM (10 ml), and then washed with water (10 ml). The organic layer was dried over MgSO4, filtered and then evaporated. The residue was purified by preparative HPLC (Waters SunFire column, 5μ silica, 19 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 0.1% formic acid) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.026 g, 30%) as the formate salt; 1H NMR (400 MHz, DMSO-d6) 1.28 (3H, d), 1.38-1.47 (1H, m), 1.47-1.57 (2H, m), 1.75 (1H, dd), 3.11 (1H, s), 3.28 (1H, dd), 3.52 (1H, dd), 3.67 (1H, dd), 3.81 (1H, d), 3.98-4.04 (1H, m), 4.18 (1H, s), 4.58 (1H, s), 7.00 (1H, s), 7.22 (1H, d), 7.59 (1H, d), 7.95 (1H, d), 8.34 (1H, d), 8.41 (3H, s), 11.83 (1H, s); m/z: (ES+) MH+, 413.11. Example 2.02 can also be prepared as follows: Dichlorobis(triphenylphosphine)palladium(II) (0.061 g, 0.09 mmol) was added to (3R)-4-(2-chloro-6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)pyrimidin-4-yl)-3-methylmorpholine (1.15 g, 3.48 mmol), 2M sodium carbonate solution (6.95 ml, 13.90 mmol) and 1H-pyrrolo[2,3-b]pyridin-4-ylboronic acid (1.877 g, 3.48 mmol) under nitrogen. The resulting solution was stirred at 85° C. for 6 hours. The reaction mixture was diluted with EtOAc (200 ml), and washed sequentially with water (200 ml) and saturated brine (100 ml). The organic layer was dried over MgSO4, filtered and then evaporated onto silica gel (10 g). The resulting powder was purified by flash chromatography on silica, eluting with a gradient of 0 to 5% MeOH in DCM. Pure fractions were evaporated to afford the title compound (0.660 g, 46%); 1H NMR (400 MHz, CDCl3) 1.39 (3H, d), 1.53-1.61 (2H, m), 1.78-1.84 (2H, m), 2.43 (1H, s), 3.16 (3H, s), 3.39 (1H, td), 3.63 (1H, td), 3.77 (1H, dd), 3.86 (1H, d), 4.07 (1H, dd), 4.17 (1H, d), 4.53 (1H, s), 6.92 (1H, s), 7.34 (1H, dd), 7.41-7.47 (1H, m), 8.06 (1H, d), 8.43 (1H, d), 9.60 (1H, s); m/z: (ES+) MH+, 413.12. Chiral HPLC: (HP1100 System 4, 5 μm Chiralcel OJ-H (250 mm×4.6 mm) column eluting with Heptane/EtOH/MeOH/TEA 50/25/25/0.1) Rf, 8.113 98.9%.
