Methyl iodide → 2-(6-chloro-1-methyl-1H-indol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide

Participants

Reaction Conditions

Reaction Steps

In a round-bottomed flask, 2-(6-chloro-1H-indol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide (90 mg, 0.156 mmol) was dissolved in DMF (1 ml). The reaction mixture was cooled to 0° C. and sodium hydride (60% dispersion in mineral oil, 8 mg, 0.20 mmol) was added. The reaction mixture was stirred at 0° C. for 30 min then methyl iodide (10 μl, 0.16 mmol) was added. The reaction mixture was stirred at 0° C. for 1.5 h then quenched with water and extracted with diethyl ether (2×). The combined organic layers were washed twice with water and once with brine then dried over sodium sulfate, filtered and concentrated. The residue was chromatographed over silica gel with MeOH/CH2Cl2/0.5% NH4OH (gradient 0-2% MeOH) to afford 56 mg (61%) of 2-(6-chloro-1-methyl-1H-indol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide as a yellow foam.

Provenance & Evidence