Ethyl Acetate → 4,5,6,7-Tetrahydro-benzo[b]thiophene-2-carboxylic acid [3-(6-{4-[(2-hydroxy-ethyl)-methyl-carbamoyl]-3-nitro-phenylamino}-4-methyl-5-oxo-4,5-dihydro-pyrazin-2-yl)-2-methyl-phenyl]-amide

Beteiligte Stoffe

Reaktionsschritte

4-(6-Bromo-4-methyl-3-oxo-3,4-dihydro-pyrazin-2-ylamino)-N-(2-hydroxy-ethyl)-N-methyl-2-nitro-benzamide (4) (250 mg, 0.59 mmol, 1.0 equiv), 4,5,6,7-Tetrahydro-benzo[b]thiophene-2-carboxylic acid[2-methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-amide (257 mg, 0.65 mmol) and tetrakis(triphenylphosphine)palladium (68 mg, 0.06 mmol) are dissolved in 1,4-dioxane (2.0 mL) and sodium carbonate (1N, 1.0 mL) and heated in a microwave glass reactor for 6 minutes at 140° C. Once completed the reaction is transferred to a seperatory funnel with ethyl acetate (50 mL) and washed with saturated sodium bicarbonate (1×100 mL), then washed with saturated sodium chloride (1×100 mL) and dried over sodium sulfate. The solution is then filtered and concentrated under reduced pressure. The resulting residue is then triturated with DCM and hexane to give 4,5,6,7-tetrahydro-benzo[b]thiophene-2-carboxylic acid [3-(6-{4-[(2-hydroxy-ethyl)-methyl-carbamoyl]-3-nitro-phenylamino}-4-methyl-5-oxo-4,5-dihydro-pyrazin-2-yl)-2-methyl-phenyl]-amide (5) as a light yellow solid (225 mg).

Herkunft & Nachweise