Reaction Steps
To a microwave tube was added (S,E)-methyl 2-(2-(3-bromophenyl)-7-(4-(buta-1,3-dien-1-yl)-4-methylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (100 mg, 0.172 mmol), (5-chloro-2-hydroxyphenyl)boronic acid (44.5 mg, 0.258 mmol), and 2.0 M aqueous K2CO3 (0.086 mL, 0.172 mmol) in dioxane (2 mL) and water (0.5 mL). The reaction was sparged with nitrogen for 1 minutes, treated Pd(PPh3)4 (19.87 mg, 0.017 mmol) then sparged for 1 min. The reaction tube was sealed and then heated at 90° C. in a microwave tube for 1 h. LCMS analysis showed 40% completion. Additional 10 mg of Pd(PPh3)4 added and heated at 90° C. for another 2 h. The reaction was concentrated, diluted with water (15 mL) and extracted wtih EtOAc. The EtOAc layer was washed with brine, then dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by biotage (0%-40% EtOAc in hexanes) to isolate 80 mg (74%) of the product as off-white foam. 1H NMR (500 MHz, CDCl3) δ 8.09 (br. s., 1H), 8.06 (d, J=7.9 Hz, 1H), 7.60 (t, J=7.5 Hz, 1H), 7.50-7.45 (m, 1H), 7.34 (d, J=2.5 Hz, 1H), 6.99 (d, J=8.7 Hz, 1H), 6.85 (s, 1H), 6.39 (dt, J=16.9, 10.2 Hz, 1H), 6.17 (dd, J=15.4, 10.4 Hz, 1H), 6.07 (s, 1H), 5.88 (d, J=15.3 Hz, 1H), 5.33 (br. s., 1H), 5.19 (d, J=17.2 Hz, 1H), 5.04 (d, J=9.6 Hz, 1H), 4.50-2.50 (m, 4 H), 3.75 (s, 3H), 2.64 (s, 3H), 1.93 (d, J=12.9 Hz, 1H), 1.87-1.73 (m, 2H), 1.67 (br. s., 1H), 1.29-1.24 (m, 12H). LCMS (M+1)=629.08.
