Cesium carbonate → 4-(4-(6-(3-Aminopiperidin-1-yl)pyridin-3-ylamino)-3-(methylsulfonyl)quinolin-6-yl)-2-chloro-6-fluorophenol

Participants

Reaction Conditions

Reaction Steps

To a suspension of tert-butyl 1-(5-(6-bromo-3-(methylsulfonyl)quinolin-4-ylamino)pyridin-2-yl)piperidin-3-ylcarbamate (70 mg, 0.121 mmol), 2-chloro-6-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (40 mg, 0.145 mmol) and Pd(dppf)Cl2 (9 mg, 0.012 mmol) in dioxane (4 mL) was added Cs2CO3 (182 μL, 2.0 M solution in H2O). The reaction mixture was degassed using N2 and heated at 140° C. for 30 min. The reaction mixture was cooled to rt and to purification by preperatory HPLC. The crude mixture was then treated with TFA to deprotect the pendant amine and reduced to a red-orange residue. This residue was then dissolved in MeOH (2 mL) and treated with a 2.0 M HCl solution in diethyl ether to afford the product (15 mg, 19%) as a brown-yellow solid: 1H NMR (300 MHz, MeOD) δ 9.07 (s, 1H), 8.32 (d, J=2.7 Hz, 1H), 8.27 (dd, J=8.8, 1.9 Hz, 1H), 8.05 (d, J=8.8 Hz, 1H), 7.93 (d, J=1.8 Hz, 1H), 7.88 (dd, J=9.3, 2.7 Hz, 1H), 7.28 (m, 1H), 7.09 (m, 2H), 4.56 (q, J=10.4, 9.4 Hz, 1H), 4.09 (d, J=13.3 Hz, 1H), 3.47 (s, 3H), 3.39 (d, 8.1 Hz, 2H), 2.21 (s, 1H), 2.01 (m, 1H), 1.75 (m, 2H); ESI MS m/z 542, [C26H25ClFN5O3S+H]+; HPLC 99.6% (AUC), tR=9.90 min.

Provenance & Evidence