Methyl iodide → ethanesulfonic acid methyl-[5-(1-methyl-1H-indol-2-yl)-pyridin-3-yl]-amide

Participants

Reaction Conditions

Reaction Steps

A flask is charged with ethanesulfonic acid [5-(1-methyl-1H-indol-2-yl)-pyridin-3-yl]-amide (Example 226, 100 mg, 0.317 mmol) and DMF (4 mL). The reaction is cooled to 0° C. and sodium hydride (15.85 mg, 0.396 mmol) is added. The reaction is stirred at 0° C. for 10 min, then methyl iodide (56.3 mg, 0.396 mmol) is added. The reaction is stirred for 1 hour at room temperature. The reaction is quenched with water (0.5 mL) and filtered. The filtrate is purified using Xbridge C18 eluting with a 10 to 100% acetonitrile-water gradient to afford ethanesulfonic acid methyl-[5-(1-methyl-1H-indol-2-yl)-pyridin-3-yl]-amide. 1H NMR (400 MHz, MeOD) δ ppm 1.39 (t, J=7.5 Hz, 3H), 3.28 (q, J=7.5 Hz, 2H), 3.49 (s, 3H), 3.84 (s, 3H), 6.74 (s, 1H), 7.14 (t, J=7.6 Hz, 1H), 7.28 (ddd, J=7.6, 1.1 Hz, 1H), 7.49 (d, J=8.3 Hz, 1H), 7.63 (d, J=7.8 Hz, 1H), 8.13 (t, J=2.1 Hz, 1H), 8.70 (d, J=2.0 Hz, 1H), 8.70 (d, J=2.5 Hz, 1H). HRMS (ESI) m/z 330.1281 [(M+H)+ Calcd for C17H19N3O2S 330.1270].

Provenance & Evidence