Diisopropylethylamine → Benzyl [2-[({4-[(3S,5R)-3-amino-5-methylpiperidin-1-yl]pyridin-3-yl}amino)carbonyl]-7-(3-oxopiperazin-1-yl)quinolin-3-yl]carbamate

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Reaction Steps

To a mixture of 3-{[(benzyloxy)carbonyl]amino}-7-(3-oxopiperazin-1-yl)quinoline-2-carboxylic acid (0.014 g, 0.033 mmol), tert-butyl [(3S,5R)-1-(3-aminopyridin-4-yl)-5-methylpiperidin-3-yl]carbamate (0.014 g, 0.046 mmol) and HATU (0.034 g, 0.089 mmol) in DMF (0.3 mL), DIPEA (0.020 mL, 0.11 mmol) was added. The mixture was stirred at room temperature for 2 h. The mixture was then diluted with 5 mL of EtOAc and 3 mL of 1 M NaOH. The layers were separated and the aqueous layer was extracted with EtOAc. The organic layers were combined and concentrated under reduced pressure. To the resulting residue, 2 mL of 4 M HCl in dioxane and 1 mL of MeOH were added. The mixture was stirred at room temperature for 1 h, then concentrated under reduced pressure. The resulting residue was purified by preparative HPLC (XBridge™ C18 column, eluting with a gradient of MeCN/water containing 0.1% NH4OH, at a flow rate of 60 mL/min.) to afford the sub-title compound (0.0088 g, 43%). LCMS calc. for C33H37N8O4 [M+H]+: m/z=609.3. found: 609.3.

Provenance & Evidence