N,N-Dimethylethylenediamine → isopropyl ((2S,4R)-1-acetyl-6-(4-((2-(dimethylamino)ethyl)carbamoyl)phenyl)-2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)carbamate

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Reaction Steps

To a solution of 4-((2S,4R)-1-acetyl-4-((isopropoxycarbonyl)amino)-2-methyl-1,2,3,4-tetrahydroquinolin-6-yl)benzoic acid (for a preparation see Intermediate 48) (67 mg, 0.163 mmol) and N1,N1-dimethylethane-1,2-diamine (28.8 mg, 0.326 mmol) in DMF (2 mL) were added HATU (93 mg, 0.245 mmol) and DIPEA (0.086 mL, 0.490 mmol). The resulting mixture was stirred at room temperature for 1 h, then hydrolyzed by adding water and EtOAc. The layers were separated and the aqueous phase was extracted with EtOAc (×3). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated in vacuo. The residue was dissolved in 1:1 MeOH/DMSO and was purified by MDAP (formate). The appropriate fractions were combined and concentrated under reduced pressure to give isopropyl ((2S,4R)-1-acetyl-6-(4-((2-(dimethylamino)ethyl)carbamoyl)phenyl)-2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)carbamate (35 mg, 41%) as a viscous colourless oil. LCMS (Formate, 2 min), Rt=0.65 min, MH+=481.

Provenance & Evidence