Methyl iodide → (S)-1-(3,3-dimethyl-1-(methylamino)-1-oxobutan-2-ylcarbamoyl)-7,7-dimethyl-3-phenyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazin-7-ium iodide

Participants

Reaction Steps

(S)—N-(3,3-dimethyl-1-(methylamino)-1-oxobutan-2-yl)-7-methyl-3-phenyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazine-1-carboxamide (Compound 48; 0.09 g, 0.24 mmol) was dissolved in acetone (2 mL) and methyl iodide (0.038 g, 0.26 mmol) was added. The reaction mixture was stirred for 18 hours. The mixture was concentrated, ethyl acetate was added and the resulting solid was filtered, washed with cold ethyl acetate and dried under vacuum to provide the desired product, Compound 311 (0.031 g, 24%) as a yellow solid. 1H-NMR (400 MHz, DMSO-d6) δ: 0.93 (s, 9H), 2.59 (d, 3H), 3.30 (s, 6H), 3.86 (t, 2H), 4.32 (d, 1H), 4.57 (t, 2H), 5.06 (dd, 2H), 7.54 (m, 4H), 7.82 (m, 2H), 8.17 (m, 1H); LCMS (+ESI) m/z 398.2 [M+H]+.

Provenance & Evidence