Diisopropylethylamine → 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((1R,2S)-2-hydroxy-1-hydroxymethyl-propyl)-amide

Participants

Reaction Steps

A 25 mL round-bottomed flask was charged with 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (102 mg, 0.23 mmol), (2R,3S)-2-aminobutane-1,3-diol (34 mg, 0.32 mmol), and HATU (97 mg, 0.25 mmol). Then added acetonitrile (6 mL) followed by N,N-diisopropylethylamine (0.25 mL, 1.43 mmol). The reaction mixture was stirred at room temperature overnight then quenched with water. The mixture was extracted with ethyl acetate (3×). The organic layers were combined, dried over Na2SO4, and concentrated. The residue was purified by chromatography over SiO2 with EtOAc/heptanes (gradient: 5-100% EtOAc) to afford 100 mg (82%) of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((1R,2S)-2-hydroxy-1-hydroxymethyl-propyl)-amide as a white solid. MS: [M+Na]+=551.

Provenance & Evidence