Diisopropylethylamine → Hydrochloric Acid

Participants

Reaction Steps

To a solution of (R)-5-(methyl(piperidin-3-yl)amino)-3-(4-(morpholine-4-carbonyl)phenylamino)pyrazine-2-carboxamide hydrochloride (92) (40 mg, 0.084 mmol) in NMP (3 mL) was added (E)-4-(dimethylamino)but-2-enoic acid (42 mg, 0.25 mmol), DIEA (150 μL, 0.84 mmol) and then PyBOP (88 mg, 0.17 mmol). The mixture was stirred at RT for 1.5 h, quenched with TFA (0.2 mL), diluted with 2 mL water, and subjected to reverse phase preparative HPLC to isolate the title compound (94) as an HCl salt (29 mg). MS found for C28H38N8O4 as (M+H)+ 551.3, (M−H)− 549.3. UV: λ=274, 281, 313, 344, 369 nm.

Provenance & Evidence