1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 22184968, compound

Participants

Reaction Steps

To a solution of 2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline (142 mg, 0.30 mmol) in tetrahydrofuran (THF) (5 mL) was added glycine t-butyl ester hydrochloride (44 mg, 0.33 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (64 mg, 0.33 mmol), 1-hydroxybenzotriazole (HOBT) (45 mg, 0.33 mmol) and diisopropylethylamine (DIEA) (0.43 g, 0.33 mmol). The reaction was stirred at ambient temperature overnight. The resultant solution was partitioned between water and ethyl acetate. The organic layer was concentrated in vacuo to afford an oil. The crude product was purified by elution through silica gel with 20:1 methylene chloride-methanol to afford 2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxycarbonyl)methyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline (62 mg, 35%); NMR (CDCl3) 1.25 (t, 3), 1.50 (s, 9), 2.00 (m, 1), 2.15–2.50 (m, 3), 3.31–3.95 (m, 9), 4.10–4.32 (m, 7), 5.40 (m, 1), 759 (t, 1), 7.63 (s, 1), 7.75 (t, 1), 8.14 (d, 1), 8.22 (d, 1), 9.41 (d, 1) ppm.

Provenance & Evidence