Reaction Steps
To a well stirred suspension of thiomorpholine 1,1-dioxide (0.36 g, 2.7 mmol) and potassium carbonate (0.37 g, 2.7 mmol) in acetone (5 mL) was added 1-bromo-4-chloromethyl-benzene (0.50 g, 2.4 mmol). The mixture was stirred for 48 hours at room temperature. The mixture was filtered and the volatiles were evaporated. The residue was suspended in ether (100 mL), filtered and evaporated to a solid. The material was purified via chromatography utilizing an ISCO automated purification apparatus (24 g silica gel column 10%→100% ethyl acetate in hexane). 4-(4-Bromo-benzyl)-thiomorpholine 1,1-dioxide was isolated as a white solid (0.72 g, 97%). 1H NMR (400 MHz, CDCl3, δ, ppm): 7.47 (d, J=7.6 Hz, 2H), 7.19 (d, J=7.7 Hz, 2H), 3.60 (s, 2H), 3.08-2.94 (m, 8H). MS=304, 306 (MH)+. 114b) N-{4-[(1,1-dioxidothiomorpholin-4-yl)methyl]phenyl}-8-[4-(methylsulfonyl)phenyl][1,2,4]triazolo[1,5-a]pyridin-2-amine was prepared from 8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine (75.0 mg, 0.260 mmol) and 4-(4-bromo-benzyl)-thiomorpholine 1,1-dioxide (90.0 mg, 0.296 mmol) with 2,2′-bis-dicyclohexylphosphanyl-biphenyl (25.0 mg, 0.0457 mmol) as the ligand in a manner analogous to Example 2d. Product isolated as a pale yellow foam (0.039 g, 29%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.50 (d, J=6.7 Hz, 1H), 8.23 (d, J=7.4 Hz, 2H), 8.09 (d, J=8.0 Hz, 2H), 7.67 (d, J=6.9 Hz, 1H), 7.56 (d, J=7.2 Hz, 2H), 7.29 (d, J=7.8 Hz, 2H), 7.04 (t, J=7.2 Hz, 1H), 6.94 (s, 1H), 3.62 (s, 2H), 3.10 (s, 3H), 3.08-3.03 (m, 4H), 3.02-2.97 (m, 4H). MS=512 (MH)+.
